Multiple Choice Questions on If the positions of the digits of a two digit number are interchanged the number obtained is smaller........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

If the positions of the digits of a two digit number are interchanged the number obtained is smaller...........

Quantitative Aptitude ( CCS) Number System
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    If the positions of the digits of a two digit number are interchanged, the number obtained is smaller than the original number by 27. If the digits of the number are in the ratio of 1:2, what is the original number?

    16

    Incorrect Answer

    32

    Incorrect Answer

    63

    Correct Answer

    48

    Incorrect Answer
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    Explanation:

    original number – 10x + y
    (10x + y) – (10y + x) = 27
    9(x – y) = 27
    x – y = 3
    y/x = 1/2
    x = 2y
    y = 3, x = 6
    =>63

    By: Amit Kumar
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