AGES 2 SEC TRICK | NO PEN NO PAPER | BEST & SMART APPROACHES By Chandan Venna | #Chandan_Logics

00:32:28
https://www.youtube.com/watch?v=STaokT5d9Q4

Sintesi

TLDREn aquest vídeo, Chendan del canal

Punti di forza

  • 💡 Es poden resoldre problemes d'edats sense paper i bolígraf.
  • ⌛ Important ser ràpid i eficient en els exàmens.
  • 📝 Utilitzar la verificació d'opcions pot estalviar temps.
  • 🔄 Els problemes d'edat solen seguir patrons repetitius.
  • 📏 Les proporcions són clau per solucionar els problemes.
  • 📚 Ideal per a estudiants que es preparen per a proves de competència.
  • 🧠 Cal comprendre i analitzar bé les preguntes.
  • 📈 Els mètodes proposats cobreixen el 95% dels casos.
  • 🧮 Mitjana i progressions són eines útils.
  • 🎯 Enfocament en estratègies úniques per destacar.

Linea temporale

  • 00:00:00 - 00:05:00

    El vídeo comença amb una salutació i una presentació del canal de YouTube 'Channel Logics', animant els espectadors a subscriure's si encara no ho han fet i compartint que el vídeo proporcionarà tècniques per resoldre qüestions del tema 'edats' sense utilitzar paper i llapis, destacant la seva rellevància en exàmens competitius.

  • 00:05:00 - 00:10:00

    Les tècniques explicades inclouen un mètode basat en la simplificació de ràtios mitjançant parts iguals per resoldre qüestions sobre edats, exemplificant amb un problema d'edats on les edats actuals estan en una proporció de 3:5. Es destaca la importància d'estalviar temps utilitzant mètodes intel·ligents en exàmens.

  • 00:10:00 - 00:15:00

    Es descriu com utilitzar la verificació d'opcions per a estalviar temps en exàmens. Quan es tracta d'un problema en què les edats actuals d'A i B estan en proporció de 3:5, s'indica com identificar la resposta correcta mitjançant les opcions proposades, subratllant la utilitat d'entendre ben les preguntes en exàmens competitius.

  • 00:15:00 - 00:20:00

    Es presenta un altre exemple on es utilitzen mètodes de verificació d'opcions per identificar ràpidament la resposta correcta. Utilitzar correctament la informació donada en una pregunta pot permetre una resolució eficient i sense fer càlculs extensos, fent ús del mètode intel·ligent.

  • 00:20:00 - 00:25:00

    L'exemple mostra com calcular ràpidament la suma d'edats en un problema relacionat amb la mitjana d'edats. La clau resideix a identificar que els termes estan en progressió aritmètica i que per tant l'edat mitjana és el terme mig, destacant la simplificació a través d'aquesta observació crítica.

  • 00:25:00 - 00:32:28

    El vídeo conclou amb l'advertència sobre la importància d'entendre bé les preguntes i pensar de manera innovadora per tenir èxit en exàmens competitius, impulsant els espectadors a treballar dur i utilitzar estratègies úniques per destacar entre la competència, i animant a seguir el canal per més contingut útil.

Mostra di più

Mappa mentale

Mind Map

Domande frequenti

  • De què tracta aquest vídeo?

    El vídeo tracta sobre tècniques per resoldre problemes de càlcul d'edats de forma ràpida i eficient.

  • Quines tècniques es presenten?

    Es presenten tècniques per resoldre problemes de càlcul d'edats sense utilitzar paper i bolígraf.

  • Aquestes tècniques són útils per a quin tipus d'exàmens?

    Són útils per a exàmens de competències com bancs, SSC, defensa, i exàmens CAT.

  • Quina és l'estratègia clau suggerida pel vídeo?

    L'estratègia clau és utilitzar la verificació d'opcions i càlcul ràpid de diferències en parts i anys.

  • És necessari utilitzar paper i bolígraf?

    No, el vídeo destaca tècniques que la majoria dels problemes es poden resoldre sense paper i bolígraf.

  • Quantes preguntes cobreix el vídeo?

    No es menciona un nombre específic de preguntes cobertes.

  • Quin és el ratio inicial d'edats d'A i B plantejat en el vídeo?

    Inicialment, les edats d'A i B són en la proporció de 3:5.

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Sottotitoli
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    hi everyone this is chendan and welcome
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    you want to download free pdf materials
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    you can join our telegram group we have
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    provided our telegram group link in the
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    description so in this video we're going
  • 00:00:44
    to discuss questions from topic ages
  • 00:00:47
    actually ages is one of the simplest
  • 00:00:50
    topic and truly speaking 95 percent of
  • 00:00:54
    questions from topic ages can be
  • 00:00:57
    answered without using your pen and
  • 00:00:59
    paper yes without using your pen and
  • 00:01:02
    paper 95 percent of questions can be
  • 00:01:05
    solved very very easily in just fraction
  • 00:01:08
    of seconds
  • 00:01:09
    i am going to share the wonderful
  • 00:01:11
    technique where you can solve 95 percent
  • 00:01:15
    of questions from topic ages without
  • 00:01:18
    using your pen and paper so just watch
  • 00:01:20
    the video completely and you are going
  • 00:01:22
    to get complete idea how to solve
  • 00:01:24
    questions from ages without using your
  • 00:01:27
    pen and paper okay
  • 00:01:29
    and this is very important topic and
  • 00:01:31
    from this topic you're going to get
  • 00:01:33
    questions frequently in every committee
  • 00:01:35
    to exam whatever the examination you're
  • 00:01:37
    going to write whether it is bank exam
  • 00:01:39
    or ssc exam or railway or defense or cat
  • 00:01:42
    or afghan examination whatever the
  • 00:01:44
    examination may be definitely you are
  • 00:01:45
    going to get questions from topic ages
  • 00:01:47
    okay look here here we have a question
  • 00:01:50
    the ages of a and b are presently in the
  • 00:01:54
    ratio three ratio five
  • 00:01:57
    nine years ago
  • 00:01:59
    this ratio will become 12 ratio 23 what
  • 00:02:03
    is the present age of a so we are
  • 00:02:05
    supposed to say what is the present age
  • 00:02:07
    of a and don't forget in this video i am
  • 00:02:10
    not going to discuss complete concept i
  • 00:02:13
    am going to share you smart approaches
  • 00:02:16
    to solve questions in examination point
  • 00:02:18
    of view okay now look here we are
  • 00:02:20
    supposed to say present age of a
  • 00:02:23
    actually this question can be solved in
  • 00:02:26
    several ways
  • 00:02:27
    first what generally most of the
  • 00:02:29
    students do i am going to show that
  • 00:02:31
    observe carefully what most of the
  • 00:02:33
    students will do is they will take
  • 00:02:35
    present ages as
  • 00:02:37
    3 x
  • 00:02:38
    5 x yes or no percentages 3 x 5 x
  • 00:02:43
    next question said 9 years ago this
  • 00:02:47
    ratio will become 12 ratio 23 nine years
  • 00:02:50
    ago means i have to subtract yes or no
  • 00:02:53
    nine years ago means i have subtract if
  • 00:02:56
    percentage is three x
  • 00:02:57
    nine years ago means it should be three
  • 00:02:59
    x minus nine if percentage is five x
  • 00:03:02
    means nine years ago means it should be
  • 00:03:04
    5 x minus 9 9 years ago what is the
  • 00:03:07
    ratio ratio is 12 ratio 23 yes now what
  • 00:03:12
    we have to do we have to do cross
  • 00:03:14
    multiplication once we do cross
  • 00:03:16
    multiplication we'll come to the value
  • 00:03:18
    of x once we know the value of x then we
  • 00:03:20
    can say ash and bh also yes now this is
  • 00:03:25
    how most of the students do in
  • 00:03:27
    examination this is one way to solve the
  • 00:03:30
    question okay one more way one more way
  • 00:03:32
    to solve the question is observe
  • 00:03:34
    carefully percentage ratio is what
  • 00:03:37
    percentage ratio is 3 ratio 5 yes or no
  • 00:03:40
    present ages ratio is 3 ratio 5
  • 00:03:45
    years ago this ratio will become 12
  • 00:03:48
    ratio 23 nine years ago ratio is 12
  • 00:03:52
    ratio 23 now observe here most of the
  • 00:03:55
    students they will try to do with parts
  • 00:03:58
    when they are trying to do with parts
  • 00:04:00
    look here what's the difference here 3
  • 00:04:02
    12 difference is nothing but 9
  • 00:04:04
    okay next similarly if you observe here
  • 00:04:07
    5 or 23 what is the difference 5 23
  • 00:04:10
    difference is nothing but 18 okay
  • 00:04:13
    now observe here this is nine parts this
  • 00:04:16
    is 18 parts which means parts are not
  • 00:04:19
    same when parts are not the same we have
  • 00:04:22
    to make them same how to make them same
  • 00:04:24
    just to take above difference three five
  • 00:04:26
    difference is what two
  • 00:04:28
    next take below difference 12 23
  • 00:04:31
    difference is what level take above
  • 00:04:33
    difference take below difference and
  • 00:04:35
    next what you have to do is multiply
  • 00:04:38
    above difference below multiply above
  • 00:04:40
    difference below okay next similarly
  • 00:04:44
    multiply below difference above now once
  • 00:04:46
    if you are going to do this then
  • 00:04:48
    automatically parts is going to become
  • 00:04:50
    same if you want you can check 3 into 11
  • 00:04:53
    now is going to be 33 5 into 11 now this
  • 00:04:56
    is going to be 55 okay similarly observe
  • 00:04:59
    here similarly if you observe here just
  • 00:05:01
    a minute this is 3 into 2 so if you
  • 00:05:04
    observe here 2 into 12 now is going to
  • 00:05:06
    be 24 23 into
  • 00:05:09
    2 now this is going to be 46 okay now
  • 00:05:13
    observe carefully once after getting the
  • 00:05:15
    new ratios you have to neglect old
  • 00:05:18
    ratios once after getting new ratios you
  • 00:05:20
    can neglect old ratios now check whether
  • 00:05:23
    the parts are same or not now observe
  • 00:05:26
    here 33 24 means difference is going to
  • 00:05:28
    be how many parts 33 24 means difference
  • 00:05:31
    is going to be 9 parts yes similarly 46
  • 00:05:35
    55 46 55 is different is going to be how
  • 00:05:38
    many parts nine parts yes now observe
  • 00:05:41
    your parts are same yes parts are same
  • 00:05:44
    and this is nothing but present ratio
  • 00:05:47
    yes this is present ratio this one is
  • 00:05:49
    what this is nine years ago ratio which
  • 00:05:52
    means difference in parts is nine parts
  • 00:05:56
    yes difference in parts is nine parts
  • 00:06:00
    difference in years is nine years yes
  • 00:06:03
    parts difference is nine parts years
  • 00:06:05
    difference is nine years so i can simply
  • 00:06:07
    say nine parts is equal to nine years
  • 00:06:11
    yes if nine parts is nine years we can
  • 00:06:14
    say one part is equal to one year if one
  • 00:06:17
    part is one year we need to know present
  • 00:06:21
    age of a present age of a is nothing but
  • 00:06:24
    33 parts so if one part is one year 33
  • 00:06:27
    parts is going to be 33 years so we can
  • 00:06:29
    say answer for this question is going to
  • 00:06:31
    be 33 years yes
  • 00:06:33
    now this is one way to solve the
  • 00:06:35
    question even if you solve in this way
  • 00:06:37
    it is going to consume time in
  • 00:06:38
    examination yes we have one more way
  • 00:06:41
    observe carefully one more way and after
  • 00:06:43
    this i am going to say
  • 00:06:45
    how to solve the question just by
  • 00:06:48
    looking at the question just by looking
  • 00:06:49
    at the question how to solve ages
  • 00:06:51
    questions very easily okay absolutely
  • 00:06:53
    carefully one more method
  • 00:06:55
    one more method to solve this question
  • 00:06:57
    is percentages ratio is what percentage
  • 00:06:59
    ratio is three ratio 5
  • 00:07:02
    present age ratio 3 ratio 5
  • 00:07:05
    9 years ago ratio will become 12 ratio
  • 00:07:08
    23 yes so 12 raise to 23 when nine years
  • 00:07:12
    ago as it is 98 ago minus 9 minus 9 okay
  • 00:07:15
    now what you can do is do cross
  • 00:07:17
    multiplication 3 into 23 what is 3 into
  • 00:07:20
    23 it is going to be 69 so 69 parts 12
  • 00:07:24
    into 5 it is going to be 60 so this is
  • 00:07:26
    going to be 60 parts now 69 parts 60
  • 00:07:29
    parts means difference is going to be
  • 00:07:30
    how much 9 parts so difference in terms
  • 00:07:33
    of parts is 9 parts similarly 12 into
  • 00:07:37
    minus 9 now this is nothing but minus 9
  • 00:07:40
    into 12 okay similarly minus 9 into 23
  • 00:07:44
    minus 9 into 23 minus 9 into 23 and you
  • 00:07:48
    have to subtract as you have to subtract
  • 00:07:50
    minus of minus means now this is going
  • 00:07:52
    to be plus yes or no so plus 9 into 23
  • 00:07:55
    now observe here just for the purpose of
  • 00:07:57
    making calculations simple what i am
  • 00:07:59
    going to do is i am going to take 9 9
  • 00:08:02
    common if i take 9 common this is going
  • 00:08:05
    to be how much 9 common then it is going
  • 00:08:07
    to be 23 minus 12 yes or no if i take 9
  • 00:08:11
    common this is 9 into 23 9 into 23 minus
  • 00:08:14
    9 into 12 you can write in this way yes
  • 00:08:16
    or no 9 into 23 minus 9 in 12 if you
  • 00:08:18
    take 9 common it will be 23 minus 12
  • 00:08:21
    which means 9 into 11. now observe here
  • 00:08:24
    we got in terms of parts nine parts nine
  • 00:08:27
    parts equal to nine into eleven now from
  • 00:08:30
    this if you observe nine nine gets
  • 00:08:32
    cancelled so we can say one part equal
  • 00:08:34
    to eleven if one part is eleven now we
  • 00:08:37
    need to know the present age of a
  • 00:08:39
    present age of a is going to be how many
  • 00:08:41
    parts percentage of a is 3 parts if one
  • 00:08:44
    part is 11 3 parts will be 3 into 11
  • 00:08:46
    that is going to be 33 yes now even this
  • 00:08:49
    is going to consume lot of time in
  • 00:08:50
    examination then how to solve these type
  • 00:08:53
    of questions very easily in examination
  • 00:08:56
    observe carefully what you can do is
  • 00:08:58
    whenever you have questions based upon
  • 00:09:01
    ages what you can do is most of the time
  • 00:09:04
    95 percent of time you can solve these
  • 00:09:06
    questions just by using option
  • 00:09:08
    verification yes just by applying option
  • 00:09:11
    verification you can solve these
  • 00:09:13
    questions but when you are applying
  • 00:09:14
    option verification you have to read the
  • 00:09:17
    question carefully understand the
  • 00:09:19
    question carefully and then you have to
  • 00:09:21
    apply option verification okay now our
  • 00:09:23
    requirement what is our requirement our
  • 00:09:25
    requirement is present age off in
  • 00:09:28
    whenever you're trying to apply option
  • 00:09:30
    verification first of all you need to
  • 00:09:32
    know what are the given options so given
  • 00:09:35
    options are present age of a okay these
  • 00:09:38
    are present days of a in the question it
  • 00:09:40
    is very clearly said that a b present
  • 00:09:43
    ratio is 3 ratio 5 which means yes
  • 00:09:46
    percentage is going to be 3 multiple 3
  • 00:09:49
    ratio 5 means 3 into something 3 into
  • 00:09:52
    something means 3 multiple yes or no now
  • 00:09:54
    is a 27 multiple of 3 yes is 33 multiple
  • 00:09:58
    of 3 yes sir is 49 multiple of 3 no is
  • 00:10:01
    55 multiple of 3 no which means out of
  • 00:10:04
    four options two options eliminated okay
  • 00:10:08
    now we have two more options you need
  • 00:10:10
    not worry we have statement something
  • 00:10:12
    okay we have extra statements in the
  • 00:10:14
    question read that extra statements next
  • 00:10:17
    nine years ago this ratio will become 12
  • 00:10:20
    ratio 23 which means nine years back
  • 00:10:23
    ratio was given nine years back ratio 12
  • 00:10:26
    ratio 23 i am looking for a y means in
  • 00:10:29
    options i have a as i have a that is
  • 00:10:31
    reason now yes age should be multiple of
  • 00:10:35
    12 yes a should be multiple of 12 when
  • 00:10:38
    nine years back nine years back it
  • 00:10:40
    should be multiple of twelve nine years
  • 00:10:42
    back means i need to subtract nine yes
  • 00:10:44
    from 27 if you subtract 9 this is going
  • 00:10:46
    to be how much 18 yes he is 18 multiple
  • 00:10:49
    of 12 no so this is also going to be
  • 00:10:51
    wrong answer yes y means 18 is not
  • 00:10:53
    multiple of 12. now observe carefully
  • 00:10:56
    out of four options three options
  • 00:10:57
    eliminated which means definitely i can
  • 00:10:59
    say 33 is going to be my answer yes if
  • 00:11:02
    you want you can verify also if you
  • 00:11:03
    verify 9 years back means 33 minus 9 if
  • 00:11:07
    you subtract 33 minus 9 it is going to
  • 00:11:09
    be 24. now look is 24 multiple of 12 yes
  • 00:11:13
    24 is multiple of 12 so we can say
  • 00:11:15
    answer is going to be 33 so 33 is going
  • 00:11:18
    to satisfy the condition so we can solve
  • 00:11:20
    either in this way or in this way or in
  • 00:11:22
    this way or you can solve using option
  • 00:11:25
    verification also when you are trying to
  • 00:11:27
    solve question using option verification
  • 00:11:29
    this question can be solved without
  • 00:11:31
    using pen and paper but for all these
  • 00:11:33
    techniques obviously you have to use pen
  • 00:11:35
    and paper so that is the reason try to
  • 00:11:38
    be always smart and unique in
  • 00:11:40
    examination if you're smart and unique
  • 00:11:42
    in examination then obviously you can
  • 00:11:44
    save lot of time in examination just
  • 00:11:47
    getting the mark is not important in how
  • 00:11:49
    much time you're getting the mark it is
  • 00:11:51
    very very important in competitive exams
  • 00:11:53
    always you have to be smart always you
  • 00:11:55
    have to be unique try to utilize the
  • 00:11:57
    information given in the question
  • 00:11:59
    properly if you are able to utilize the
  • 00:12:01
    information given in the question
  • 00:12:02
    properly then you can solve these type
  • 00:12:04
    of questions very very easily almost 95
  • 00:12:07
    percent of questions from topic ages can
  • 00:12:09
    be solved just by using option
  • 00:12:12
    verification yes
  • 00:12:14
    we can solve one more question look at
  • 00:12:15
    this
  • 00:12:16
    the respective ratio of the present age
  • 00:12:19
    of a mother and daughter is seven ratio
  • 00:12:21
    one
  • 00:12:23
    four years ago the respective ratio of
  • 00:12:25
    their age was 19 ratio one
  • 00:12:28
    what will be the mother's age four years
  • 00:12:31
    from now we are supposed to know
  • 00:12:33
    mother's age four years from now so
  • 00:12:35
    given options are mother's age after
  • 00:12:38
    four years yes or no mother's age after
  • 00:12:41
    four years now even now this question
  • 00:12:43
    can be done using option verification if
  • 00:12:46
    you want to verify option verification
  • 00:12:48
    first you need to know what is the
  • 00:12:50
    option we can know that options are
  • 00:12:52
    nothing but mother's age after four
  • 00:12:54
    years now what is given in the question
  • 00:12:56
    in the question it is said present age
  • 00:12:58
    of mother daughter is seven ratio one
  • 00:13:01
    which means percentage of mother should
  • 00:13:03
    be multiple of seven yes mother's
  • 00:13:05
    present day should be multiple of seven
  • 00:13:07
    if i need to know mother's percentage
  • 00:13:09
    means i need to subtract four y means
  • 00:13:12
    these ages are after four years after
  • 00:13:15
    four years these are ages of mother if i
  • 00:13:18
    need to know percentage means i have to
  • 00:13:20
    subtract 4 now subtract 42 minus 4 it is
  • 00:13:23
    going to be 38 is 38 multiple of 7 no so
  • 00:13:27
    this is wrong answer next 38 minus 4
  • 00:13:30
    that is going to be 34 is 34 multiple of
  • 00:13:34
    7 no wrong answer next 46 minus 4 it is
  • 00:13:38
    going to be 42 yes is 42 multiple of 7
  • 00:13:42
    yes 42 is multiple of 7 so this can be
  • 00:13:45
    our answer next 36 minus 4 it is going
  • 00:13:48
    to be 32 yes now is 32 multiple of 7 no
  • 00:13:53
    so this is wrong answer so i can simply
  • 00:13:55
    say answer for this question is going to
  • 00:13:56
    be 46
  • 00:13:58
    and look at these are the exact
  • 00:14:00
    questions exact options that came in
  • 00:14:02
    examination now so many students they
  • 00:14:04
    will think like options are framed in
  • 00:14:07
    such a manner where it is going to be a
  • 00:14:10
    multiple no it's not framed by me these
  • 00:14:13
    are the exact questions that came in
  • 00:14:14
    examination if you want even you can try
  • 00:14:16
    you can open the book and you can try
  • 00:14:18
    questions whatever that came in ages
  • 00:14:21
    95 percent of questions definitely you
  • 00:14:23
    can solve just by looking at the
  • 00:14:25
    question itself yes it's true if you
  • 00:14:26
    want you can try it
  • 00:14:28
    is it clear you can try it then you'll
  • 00:14:30
    come to know you whether you're able to
  • 00:14:32
    solve these questions without using your
  • 00:14:34
    pen and paper or not okay so answer for
  • 00:14:36
    this question is nothing but 46 years
  • 00:14:38
    very very simple
  • 00:14:39
    let us look at one more question and one
  • 00:14:41
    more important thing if you like this
  • 00:14:43
    video click on the like button and try
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    to share this video with as many friends
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    as possible so that it will be
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    very supportive for us and it will be
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    very booster for us also so that we'll
  • 00:14:53
    be coming across with
  • 00:14:54
    best content which is going to be
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    helpful for you in company to exams okay
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    don't forget to share with all your
  • 00:15:00
    friends who are preparing for complete
  • 00:15:01
    exams
  • 00:15:02
    next one average age of abc is 10 years
  • 00:15:07
    less than age of c
  • 00:15:09
    if ratio of age of abc is 3 ratio 4
  • 00:15:14
    ratio 5 look here here ratio of age it
  • 00:15:18
    was mentioned but whether it is
  • 00:15:19
    presentage or
  • 00:15:21
    whether it is after 5 years or whether
  • 00:15:23
    it is three years ago nothing was
  • 00:15:25
    mentioned if nothing was mentioned you
  • 00:15:27
    are supposed to take it as present age
  • 00:15:30
    only is it clear very important point if
  • 00:15:32
    nothing was mentioned you're supposed to
  • 00:15:34
    take percentage only percentage ratio of
  • 00:15:36
    abc is 3 ratio 4 ratio 5 we are supposed
  • 00:15:40
    to know what is the sum of age of a and
  • 00:15:44
    c so we are supposed to know sum of
  • 00:15:46
    edges of ac sum of edges of ac now
  • 00:15:50
    observe carefully in the question abc
  • 00:15:52
    age ratio was mentioned yes what is abc
  • 00:15:55
    age ratio abc age ratio is 3 ratio 4
  • 00:16:00
    ratio 5 yes or no 3 ratio 4 ratio 5 we
  • 00:16:05
    are supposed to find sum of edges of ac
  • 00:16:08
    which means sum of present days of ac
  • 00:16:11
    nothing was mentioned means percentage
  • 00:16:13
    now observe carefully percentage of a
  • 00:16:16
    should be multiple of 3 percentage of c
  • 00:16:18
    should be multiple of 5 sum means 3 plus
  • 00:16:22
    5 that is going to be 8 parts 8 parts
  • 00:16:24
    means our answer should be multiple of 8
  • 00:16:27
    yes or no our should be multiple of 8
  • 00:16:29
    let us check 80 is multiple of 8 72 is
  • 00:16:32
    multiple of 8 85 is not multiple of
  • 00:16:35
    eight 78 is not multiple of eight which
  • 00:16:38
    means out of four options two options
  • 00:16:40
    are eliminated and we are left with two
  • 00:16:42
    more options yes now read the
  • 00:16:45
    information whatever that you have a
  • 00:16:47
    guest why in the question we have some
  • 00:16:49
    more information if we observe in the
  • 00:16:51
    question is clearly said
  • 00:16:53
    average age of abc average age of abc is
  • 00:16:58
    10 years less than age of c
  • 00:17:02
    look average age of abc is 10 years less
  • 00:17:06
    than age of c now observe carefully if
  • 00:17:08
    you observe carefully average age of abc
  • 00:17:11
    means three four five three four five
  • 00:17:14
    these are nothing but ages ratio which
  • 00:17:17
    means average of three four five is what
  • 00:17:20
    three four five average is nothing but
  • 00:17:22
    four which means middle term what means
  • 00:17:24
    three four five are in arithmetic
  • 00:17:25
    progression when the given series is an
  • 00:17:27
    arithmetic progression average is
  • 00:17:29
    something but middle term so middle term
  • 00:17:30
    means for which means average age of abc
  • 00:17:34
    is going to be four parts and age of c
  • 00:17:37
    is going to be five parts and in the
  • 00:17:39
    question it is clearly said that average
  • 00:17:41
    age of abc is
  • 00:17:43
    10 years 10 years less than age of c so
  • 00:17:47
    10 years less than age of c means
  • 00:17:49
    difference between average and age of c
  • 00:17:52
    is going to be 10 years yes or no now
  • 00:17:55
    observe carefully we know that average
  • 00:17:58
    of abc in terms of parts it is four
  • 00:18:01
    parts
  • 00:18:02
    c is age in terms of parts five parts
  • 00:18:05
    difference between these two is going to
  • 00:18:07
    be one part so one part equal to ten
  • 00:18:09
    years if one part is ten years we are
  • 00:18:12
    supposed to know sum of ages of ac sum
  • 00:18:15
    of ace of ac is eight parts so 18 to 10
  • 00:18:18
    we can say answer is going to be 80
  • 00:18:20
    years so 72 is also eliminated is it
  • 00:18:22
    clear very very simple just a fraction
  • 00:18:25
    of seconds everything is given in the
  • 00:18:27
    question itself and this one also exact
  • 00:18:30
    question that came in examination you
  • 00:18:32
    will have complete information in the
  • 00:18:34
    question itself but you are supposed to
  • 00:18:37
    be in a position to understand the
  • 00:18:39
    question carefully and
  • 00:18:41
    collect the key point that was mentioned
  • 00:18:43
    the question if you're able to collect
  • 00:18:45
    the key points that is mentioned the
  • 00:18:46
    question then obviously you can solve
  • 00:18:48
    these questions in fraction of seconds
  • 00:18:50
    without using your pen and paper
  • 00:18:52
    average of three four five i can say
  • 00:18:54
    average of three four five something but
  • 00:18:56
    four which means average is four and c
  • 00:19:00
    sage is five parts
  • 00:19:02
    four parts five parts difference is one
  • 00:19:04
    part in the question it is clearly said
  • 00:19:06
    that average of abc is 10 years less
  • 00:19:09
    than age of c which means difference in
  • 00:19:11
    terms of years is 10 years difference in
  • 00:19:13
    terms of parts is one part so one part
  • 00:19:16
    is 10 years we are supposed to know age
  • 00:19:18
    of aac together age of ac is nothing but
  • 00:19:21
    total eight parts eight parts means
  • 00:19:23
    eighteen to ten eight years just a
  • 00:19:25
    fraction of seconds
  • 00:19:27
    always you have to be smart and unique
  • 00:19:30
    you have to be smart and unique once if
  • 00:19:32
    you are smart and unique then you can
  • 00:19:34
    save lot of time in examination when
  • 00:19:37
    thousands lacks of students are writing
  • 00:19:39
    examination then why only you need to
  • 00:19:41
    get the job just think of that why you
  • 00:19:44
    need to get the job means then
  • 00:19:45
    definitely you have to work hard you
  • 00:19:48
    have to be unique you have to be smart
  • 00:19:50
    you have to spend a lot of time for the
  • 00:19:52
    purpose of practice you have to come
  • 00:19:54
    across with many innovative thinkings
  • 00:19:56
    which is going to helpful for you in
  • 00:19:58
    examination when you're doing lot of
  • 00:20:00
    hard work lot of smart work if you're
  • 00:20:02
    going to do all of this then only you're
  • 00:20:04
    going to get success why means we know
  • 00:20:06
    that there is a huge competition any
  • 00:20:09
    exam whatever the examination you're
  • 00:20:10
    going to trade there is a huge
  • 00:20:11
    competition in this huge competition if
  • 00:20:14
    you are going to be one out of those
  • 00:20:17
    selected students means definitely your
  • 00:20:19
    hard work your smart work your guidance
  • 00:20:21
    and how well you're practicing what are
  • 00:20:23
    the approaches how much time you're
  • 00:20:25
    spending how much time you're spending
  • 00:20:27
    for questions how much time you're
  • 00:20:28
    spending every day all these are going
  • 00:20:30
    to play vital role who is going to work
  • 00:20:33
    hard work smart and they are going to
  • 00:20:35
    practice regularly only for them success
  • 00:20:38
    is going to come in this competition why
  • 00:20:40
    means there is a huge competition for
  • 00:20:42
    community exams yes or no
  • 00:20:44
    let us look at the next question
  • 00:20:46
    sushil got married six years ago
  • 00:20:49
    his age is seven by six times of his age
  • 00:20:53
    at the time of his marriage
  • 00:20:56
    three years ago his son was three years
  • 00:20:59
    old
  • 00:21:00
    the ratio of his sun and sushil at
  • 00:21:03
    present so we are supposed to know
  • 00:21:05
    present age ratio of
  • 00:21:08
    sushil's sun
  • 00:21:10
    and sushil okay so we are supposed to
  • 00:21:12
    know sushil sun and sushil age ratio
  • 00:21:16
    this is very very simple question even
  • 00:21:18
    in this question also complete
  • 00:21:21
    information is given in the question
  • 00:21:22
    itself but most of the students they
  • 00:21:24
    don't understand the question carefully
  • 00:21:27
    there is reason commentary to
  • 00:21:28
    examination it's all about reading the
  • 00:21:31
    question carefully understand the
  • 00:21:33
    question carefully once you very able to
  • 00:21:35
    understand question and if you are able
  • 00:21:37
    to collect the key points then it is
  • 00:21:39
    very simple to mark the answer look here
  • 00:21:42
    it is very clearly said that
  • 00:21:44
    sushil got married six years ago so six
  • 00:21:48
    years ago sushil got married
  • 00:21:50
    his age is
  • 00:21:52
    seven by six times of his age at the
  • 00:21:55
    time of his marriage
  • 00:21:57
    which means it is said that presentage
  • 00:22:00
    of sushil is
  • 00:22:01
    seven by six times of
  • 00:22:04
    his age at the time of marriage
  • 00:22:06
    which means which means this is
  • 00:22:08
    presentage yes or no this is percentage
  • 00:22:11
    and this is at the time of marriage
  • 00:22:14
    percentage of socially seven parts and
  • 00:22:17
    age of sushil at the time of marriage is
  • 00:22:20
    six parts now difference between these
  • 00:22:22
    two is going to be how many parts one
  • 00:22:24
    part yes or no difference between these
  • 00:22:26
    two is one part and it's very clear that
  • 00:22:28
    sushil got married six years ago which
  • 00:22:31
    means age difference in terms of parts
  • 00:22:35
    is one part age difference in terms of
  • 00:22:37
    years is six years so one part is equal
  • 00:22:41
    to six years if one part is six years
  • 00:22:44
    then i can say presentage of sushil is
  • 00:22:47
    going to be seven parts seven parts
  • 00:22:48
    means seven into six that is going to be
  • 00:22:51
    42 years so sushil percentage is 42
  • 00:22:54
    years i need to know sun percentage in
  • 00:22:56
    the question it is clearly said three
  • 00:22:58
    years ago his son was three years old
  • 00:23:01
    three years ago his son was three years
  • 00:23:04
    old means three years back three years
  • 00:23:07
    then what is the percentage three plus
  • 00:23:09
    three it is going to be six years yes or
  • 00:23:11
    no
  • 00:23:13
    let us say three years back my age is 24
  • 00:23:16
    years if three years back my age 24
  • 00:23:18
    means now it is going to be 24 plus 327
  • 00:23:21
    similarly here also three years back sun
  • 00:23:24
    sage is three years now will be what is
  • 00:23:26
    the age means three plus three six years
  • 00:23:28
    now calculate the ratio if you calculate
  • 00:23:30
    the ratio what happened six cancels here
  • 00:23:33
    one time six cancels here seven times so
  • 00:23:35
    ratio is going to be one ratio seven
  • 00:23:38
    just a fraction of second complete
  • 00:23:40
    information is given in the question
  • 00:23:41
    itself so it's very clearly mentioned
  • 00:23:44
    that what is his age
  • 00:23:46
    present and what is the
  • 00:23:49
    age when he was got married ratio was
  • 00:23:52
    mentioned very clearly ratio was seven
  • 00:23:54
    ratio six and it's very clearly said
  • 00:23:56
    that he got married six years back which
  • 00:23:58
    means the difference in terms of parts
  • 00:24:00
    is one part difference in terms of years
  • 00:24:02
    is six years one part is six years if
  • 00:24:04
    one party is six years we are supposed
  • 00:24:05
    to know president is a social present is
  • 00:24:07
    seven parts seven into six forty two
  • 00:24:09
    years so social age present is 42 years
  • 00:24:12
    social sun age is nothing but six years
  • 00:24:14
    six ratio 42 which is same as 1 ratio 7
  • 00:24:18
    okay complete information given in the
  • 00:24:20
    question now without understanding the
  • 00:24:22
    question what many students will do
  • 00:24:23
    they'll go on doing the rough work no
  • 00:24:25
    you are not supposed to do that
  • 00:24:27
    understanding the question is very very
  • 00:24:29
    important understand the question if
  • 00:24:30
    you're able to understand the question
  • 00:24:32
    then obviously getting the answer is
  • 00:24:34
    very easy without understanding the
  • 00:24:35
    question then how you are going to solve
  • 00:24:37
    the question you have to understand the
  • 00:24:39
    question read the question carefully
  • 00:24:41
    understand the question what is given in
  • 00:24:44
    the question you have to understand this
  • 00:24:46
    once you are able to understand the
  • 00:24:47
    information that is given in the
  • 00:24:48
    question then obviously solving
  • 00:24:50
    questions will be very very simple okay
  • 00:24:53
    let us look at one more question
  • 00:24:55
    sunigra's age is one by sixth of her
  • 00:24:58
    father's age
  • 00:24:59
    which means sunita's age will be one by
  • 00:25:02
    sixth of our father's percentage so
  • 00:25:05
    nothing was mentioned means here the
  • 00:25:06
    information is about the percentages
  • 00:25:08
    okay next her father's age will be twice
  • 00:25:12
    the
  • 00:25:13
    twice of varun sage after 10 years after
  • 00:25:16
    10 years her father's age will be twice
  • 00:25:18
    of varun say it seems if varun's eighth
  • 00:25:21
    birthday was celebrated two years ago
  • 00:25:23
    very important point warren's eighth
  • 00:25:25
    birthday was celebrated two years ago
  • 00:25:28
    then what is sunita's percentage so we
  • 00:25:32
    are supposed to know sunita's percentage
  • 00:25:34
    observe carefully in this question if
  • 00:25:36
    you need to find suritas age means first
  • 00:25:38
    you need to know father's age if you
  • 00:25:40
    really know father says means first you
  • 00:25:42
    need to know varun says once if you know
  • 00:25:44
    one stage based upon varun sage you can
  • 00:25:46
    say father sage once if you know father
  • 00:25:48
    say then automatically you can say
  • 00:25:49
    sunitas h yes first of all try to know
  • 00:25:52
    what is varun sage it is very clearly
  • 00:25:54
    said warren's eighth birthday was
  • 00:25:56
    celebrated two years ago which means two
  • 00:25:59
    years ago varun celebrated eighth
  • 00:26:02
    battery means warren's age was eight
  • 00:26:04
    years when two years ago two years ago
  • 00:26:07
    eight years means present it should be
  • 00:26:10
    eight plus two ten years yes which means
  • 00:26:13
    warren's presentation is going to be ten
  • 00:26:15
    years okay warren's a percentage
  • 00:26:18
    actually this question can be done
  • 00:26:20
    orally without using pen and paper but
  • 00:26:22
    as you guys need to understand that is
  • 00:26:24
    reason i am using pen paper okay so
  • 00:26:27
    warren's present is going to be 10 years
  • 00:26:29
    now what it is said in the question her
  • 00:26:31
    father's age will be twice of varun sage
  • 00:26:35
    after 10 years now percentage is 10
  • 00:26:38
    years means warren's present days 10
  • 00:26:39
    years means after 10 years after 10
  • 00:26:43
    years warren sage will be how much 10
  • 00:26:45
    plus 10 20 yes if varun sage is 20 means
  • 00:26:48
    father say should be double so father
  • 00:26:50
    should double means 20 double that is
  • 00:26:52
    going to be 40 which means father's age
  • 00:26:55
    is going to be 40 years after 10 years
  • 00:26:58
    but we are supposed to know what is
  • 00:27:00
    sunita's percentage if i need to know
  • 00:27:02
    what is present it means first of all i
  • 00:27:04
    need to know what is father's percentage
  • 00:27:06
    father's age after 10 years is 40 after
  • 00:27:09
    10 years 40 means percentage of father
  • 00:27:11
    is going to be 30 percentage of father
  • 00:27:13
    30 means it is very clearly said that
  • 00:27:16
    sunita's age is one by sixth or father
  • 00:27:18
    so one by sixth or father means one by
  • 00:27:20
    six in two fathers is going to be 30 so
  • 00:27:23
    30 cancels in six how many times five
  • 00:27:25
    times so we can say sunita's present day
  • 00:27:27
    is going to be five years is it clear
  • 00:27:29
    very very simple and truly speaking all
  • 00:27:32
    this information we need not write
  • 00:27:35
    but as i was explaining you each and
  • 00:27:37
    every student should be clear that is
  • 00:27:40
    reason i have written very clearly but
  • 00:27:42
    this question can be done orally if
  • 00:27:44
    varun celebrated
  • 00:27:45
    his eighth birthday two years back means
  • 00:27:47
    warren's present day is going to be 10
  • 00:27:49
    years if one's present days 10 years
  • 00:27:51
    means after 10 years warren says will be
  • 00:27:53
    28 and it's very clear that father's
  • 00:27:55
    sage is going to be twice of varun sage
  • 00:27:57
    after 10 years so 20 double will be 40.
  • 00:28:00
    so father's day is going to be 40 years
  • 00:28:02
    when after 10 years after 10 years 40
  • 00:28:04
    means present it is going to be 30 years
  • 00:28:06
    father's present is 30 years if father's
  • 00:28:08
    present day is 30 years suritas age is
  • 00:28:11
    one by six of father so one by six of 30
  • 00:28:13
    one by six of 30 means 5 which means
  • 00:28:16
    sunita's present day is going to be 5
  • 00:28:18
    years is it clear very very simple
  • 00:28:20
    question
  • 00:28:21
    so let us look at one more question the
  • 00:28:23
    sum of ages of 5 children born at the
  • 00:28:27
    regular intervals of 3 years each
  • 00:28:30
    is 50 years find out the age of youngest
  • 00:28:34
    child so we are supposed to find the age
  • 00:28:35
    of angus to child
  • 00:28:37
    actually this question is also very
  • 00:28:39
    simple question you can just mark the
  • 00:28:41
    question in fraction of seconds but what
  • 00:28:44
    most of the students will do is like
  • 00:28:46
    they will as they does not know when the
  • 00:28:48
    smallest child was born they will take
  • 00:28:51
    the smallest childless x
  • 00:28:53
    after every three years new child born
  • 00:28:55
    yes or no so
  • 00:28:57
    firstly child x means next to it will be
  • 00:28:59
    x plus 3
  • 00:29:00
    next to chill it will be x plus 6
  • 00:29:03
    next chill it will be x plus 9
  • 00:29:05
    next child it will be x plus 12 yes or
  • 00:29:08
    no total how many children 5 children 1
  • 00:29:10
    two three four five so total five
  • 00:29:13
    children every three years every three
  • 00:29:15
    years new child born first child exceeds
  • 00:29:17
    means next child x plus three years next
  • 00:29:20
    shall explain six years next year next
  • 00:29:22
    plus nine years next child x plus 12
  • 00:29:24
    years yes or no now what they're saying
  • 00:29:27
    some of their ages some of their ages is
  • 00:29:29
    going to be how much some of their ages
  • 00:29:31
    is something but 50 years now what many
  • 00:29:33
    students will do they will do some and
  • 00:29:35
    they will equal it to 50 and they will
  • 00:29:37
    find the value of x and then they will
  • 00:29:39
    say what is the age of youngest child
  • 00:29:42
    yes or no then they will say what is the
  • 00:29:44
    age of the youngest child yes but truly
  • 00:29:46
    speaking if you are going to do this in
  • 00:29:48
    examination it is going to waste lot of
  • 00:29:50
    time in examination yes or no if you are
  • 00:29:53
    really smart it is very clear that sum
  • 00:29:56
    is 50 yes or no sum is 50 if some is 50
  • 00:29:59
    what is average average of five children
  • 00:30:02
    is going to be 50 by 5 that is going to
  • 00:30:05
    be 10 years yes or no which means
  • 00:30:07
    average of five children is nothing but
  • 00:30:10
    ten years it is very clear that
  • 00:30:12
    x i x plus three x plus six x plus nine
  • 00:30:15
    x plus twelve this is in arithmetic
  • 00:30:17
    progression yes or no as the given
  • 00:30:19
    series is an arithmetic progression
  • 00:30:21
    average is nothing but a middle term
  • 00:30:23
    middle term is nothing but x plus 6 so x
  • 00:30:25
    plus 6 is nothing but 10 if x plus 6 is
  • 00:30:28
    10 then what is the value of x value of
  • 00:30:30
    x is nothing but 4 years yes or no so
  • 00:30:32
    you can directly say answer is going to
  • 00:30:33
    be 4 years you need not calculate it you
  • 00:30:36
    do not elaborate it nothing is required
  • 00:30:38
    commentary to exams no one will check
  • 00:30:41
    your rough sheet how much paper work
  • 00:30:43
    will you be you have done
  • 00:30:45
    will anyone check it no one will check
  • 00:30:47
    it after completion of your examination
  • 00:30:49
    you will throw it in the discipline so
  • 00:30:50
    always you have to avoid paperwork if
  • 00:30:54
    you have to avoid paperwork means
  • 00:30:56
    definitely you have to be smart yes or
  • 00:30:58
    no if you are smart only then you can
  • 00:31:00
    avoid paperwork so try to be smart try
  • 00:31:03
    to be unique so that you can avoid
  • 00:31:05
    paperwork if you're going to avoid
  • 00:31:07
    paperwork then obviously you can save a
  • 00:31:09
    lot of time in examination is it clear
  • 00:31:11
    so answer for this question is going to
  • 00:31:13
    be four years okay so with this we are
  • 00:31:15
    going to end the session and if you're
  • 00:31:17
    looking for more videos you can download
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    through these members and don't forget
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    try to share these videos with as many
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    friends as possible why means if you're
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  • 00:31:42
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    be helpful for us that is reason i
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    request each and every student to try to
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    is going to be helpful for us and we are
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    going to come across with more and more
  • 00:32:00
    unique techniques which are going to be
  • 00:32:01
    helpful for you in examination okay and
  • 00:32:03
    as situations are not good try to be
  • 00:32:05
    safe at your home meet in the next
  • 00:32:07
    session thank you have a nice day bye
  • 00:32:12
    [Music]
  • 00:32:27
    you
Tag
  • Aritmètica
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