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series of numbers

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LalaB GMAT Destroyer!
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series of numbers Post Sun Jan 01, 2012 3:36 am
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  • Lap #[LAPCOUNT] ([LAPTIME])
    in a series of even consecutive numbers, 30 is the eleventh smallest number and 28 is the thirteenth largest number. what is the range of the series?

    a)12
    b)22
    C)30
    d)42
    e)54

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    rijul007 GMAT Destroyer!
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    Post Sun Jan 01, 2012 3:44 am
    Lets say the series is a,b,c .... , 28, 30, 32, ....

    30 is 11th smallest
    this implies that 28 is 10th smallest

    28 is thirteenth largest


    -----(9 nos)---- 28 ----(12 nos)--

    range = 9 + 1 + 12 = 22

    Option B

    LalaB GMAT Destroyer!
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    Post Sun Jan 01, 2012 3:47 am
    rijul007 wrote:
    Lets say the series is a,b,c .... , 28, 30, 32, ....

    30 is 11th smallest
    this implies that 28 is 10th smallest

    28 is thirteenth largest


    -----(9 nos)---- 28 ----(12 nos)--

    range = 9 + 1 + 12 = 22

    Option B
    u r on a right way, but made a small mistake in ur thinking. please have one more try

    rijul007 GMAT Destroyer!
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    Post Sun Jan 01, 2012 5:04 am
    LalaB wrote:
    rijul007 wrote:
    Lets say the series is a,b,c .... , 28, 30, 32, ....

    30 is 11th smallest
    this implies that 28 is 10th smallest

    28 is thirteenth largest


    -----(9 nos)---- 28 ----(12 nos)--

    range = 9 + 1 + 12 = 22

    Option B
    u r on a right way, but made a small mistake in ur thinking. please have one more try
    Hey,
    I still dont see where I am going wrong.
    What's the OA?

    Bharath Krishnan Just gettin' started! Default Avatar
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    Post Sun Jan 01, 2012 6:21 am
    Hi,

    I am getting the answer D- 42

    28 is the 13th largest, that makes the last number to be 52

    If 30 is the 11th smallest, then 10 is the first number.

    Range: 52-10 = 42.

    Answer is D

    Please give the OA and correct me if I am wrong.

    Bharath-

    LalaB GMAT Destroyer!
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    Post Sun Jan 01, 2012 8:00 am
    rijul007 wrote:
    Lets say the series is a,b,c .... , 28, 30, 32, ....

    30 is 11th smallest
    this implies that 28 is 10th smallest

    28 is thirteenth largest


    -----(9 nos)---- 28 ----(12 nos)--

    range = 9 + 1 + 12 = 22

    Option B
    please do not forget, that the range is not the difference of terms, but the difference of numbers

    according to ur solution, if we have the series 2 4 6 8 , and 6 is the 3d smallest number and the 2nd largest number, then - 2+1+1=4, but the range is 8-2=6


    @Bharath Krishnan, yep, the correct answ is D Smile

    Thanked by: rijul007
    rijul007 GMAT Destroyer!
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    Post Sun Jan 01, 2012 9:04 am
    LalaB wrote:
    rijul007 wrote:
    Lets say the series is a,b,c .... , 28, 30, 32, ....

    30 is 11th smallest
    this implies that 28 is 10th smallest

    28 is thirteenth largest


    -----(9 nos)---- 28 ----(12 nos)--

    range = 9 + 1 + 12 = 22

    Option B
    please do not forget, that the range is not the difference of terms, but the difference of numbers

    according to ur solution, if we have the series 2 4 6 8 , and 6 is the 3d smallest number and the 2nd largest number, then - 2+1+1=4, but the range is 8-2=6


    @Bharath Krishnan, yep, the correct answ is D Smile
    oh yeah.. thanks for pointing out Very Happy

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