Multiple Choice Questions on Eight years ago A was 4 times as old as B After 8 years A will be twice as old as B What are their a........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

Eight years ago A was 4 times as old as B After 8 years A will be twice as old as B What are their a...........

Quantitative Aptitude ( CCS) Problems based on Ages
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    Eight years ago, A was 4 times as old as B. After 8 years A will be twice as old as B. What are their ages respectively? 

    45, 18

    Incorrect Answer

    40, 10

    Incorrect Answer

    42, 18

    Incorrect Answer

    40, 16

    Correct Answer
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    Explanation:

    Let B’s age 8 yrs ago = x, then A’s age = 4x
    After (8+8) = 16 years:
    (4x+16) = 2 * (x+8)
    Solve, x = 8
    A’s present age = 4x+8 = 40
    B’s present age = x+8 = 16

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