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Multiples of 4 between 12 and 96

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money9111 GMAT Titan
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Multiples of 4 between 12 and 96 Post Mon Feb 01, 2010 9:34 pm
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    How many multiples of 4 are there between 12 and 96, inclusive?

    a. 21
    b. 22
    c. 23
    d. 24
    e. 25

    didn't know where to begin with this one either... this is the last question out of my problem set that I did not get... if you'll notice there's a theme with the questions I've just posted... all the same topic... Exponents, Odds & Evens, Postives, Negatives, and Roots were all easy for me... ::sigh::

    OA B

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    kabirmohammed Just gettin' started! Default Avatar
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    Post Mon Feb 01, 2010 9:44 pm
    How many multiples of 4 are there between 12 and 96, inclusive?

    a. 21
    b. 22
    c. 23
    d. 24
    e. 25

    Multiples of 4 are : 12, 16, 20, 24, ........, 96
    for a evenly spaced set: total no of terms = (last - first)/increment
    = 96-12/4
    = 21
    as the question ask for inclusive = 21+1 =22

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    money9111 GMAT Titan
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    Post Mon Feb 01, 2010 9:52 pm
    ah ha... "Last-First/increment"... going in my notecards... thanks!

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    Cally627 Just gettin' started! Default Avatar
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    Post Sun Apr 29, 2012 10:22 am
    quick question,

    if the problem mentions "inclusive" - we add the 1.

    large - small / 2 + 1


    if the problem doesn't mention inclusive - do we not add the 1?

    thanks.

    LalaB GMAT Destroyer!
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    Post Sun Apr 29, 2012 10:53 am
    Cally627 wrote:
    quick question,

    if the problem mentions "inclusive" - we add the 1.

    large - small / 2 + 1


    if the problem doesn't mention inclusive - do we not add the 1?

    thanks.
    no.

    as for the q. above it can be solved this way-

    ((96-12)/4) +1=22

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