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    Question

    What should be subtracted from 64 and 40 to make the ratio

    of resulting numbers 3:1?
    A 28 Correct Answer Incorrect Answer
    B 25 Correct Answer Incorrect Answer
    C 12 Correct Answer Incorrect Answer
    D 36 Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let the number be 'y'.

    (64 - y) : (40 - y) = 3 : 1

    → 1 × (64 - y) = 3 × (40 - y)

    → 64 - y = 120 - 3y

    → 2y = 56

    So, y = 28

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