Multiple Choice Questions on A is three times as old as B C was twice as old as A four years ago In four years 39 time A will be ........... for Logical Reasoning ( All Exams ) Preparation

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Multiple Choice Questions

A is three times as old as B C was twice as old as A four years ago In four years 39 time A will be ...........

Logical Reasoning(Master ) Arithmetical Reasoning
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    A is three times as old as B. C was twice-as old as A four years ago. In four years' time, A will be 31. What are the present ages of B and C ?

    9, 46

    Incorrect Answer

    9, 50

    Correct Answer

    10, 46

    Incorrect Answer

    10, 50

    Incorrect Answer

    10, 65

    Incorrect Answer
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    Explanation:

    We have : A = 3B ...(i) and
    C - 4 = 2 (A - 4) ...(ii)
    Also, A + 4 = 31 or A= 31-4 = 27.
    Putting A = 27 in (i), we get: B = 9.
    Putting A = 27 in (ii), we get C = 50.

    By: Amit Kumar
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