MathOratory - Quant Notes - Arithmetic - Part 2


  • 99.9+ Quant %ile in CAT, XAT | IIM Lucknow | Managing Partner - MathOratory


    In this note, we will solve some good questions from previous XAT papers.

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    Mean Median Mode definitions below

    Mean = Arithmetic Mean = Simple Average

    Median = 50th percentile (All numbers arranged in ascending or descending order, the mid value or the average of the two mid values)

    Mode = Value having the maximum frequency = Value occurring the most number of times!

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    We have numbers 71,76,80,82,91
    As
    a,b,c,d,e
    Now
    (a+b)/2= Int.
    Also
    (a+b+c)/3= Int.
    a,b must be (76,80),(80,82),(76,82)
    Now remainders by 3

    2 for 71.
    1 for 76
    2 for 80
    1 for 82
    1 for 91

    Only triplet
    76,82,91
    Possible
    So 71 and 80

    If there are (2n + 1) terms in an AP, then find the ratio of odd terms and sum of even terms.

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