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    Question

    If 246x179y is divisible by 72, find the value of (x +

    2y).
    A 19 Correct Answer Incorrect Answer
    B 25 Correct Answer Incorrect Answer
    C 9 Correct Answer Incorrect Answer
    D 14 Correct Answer Incorrect Answer

    Solution

    ATQ,

    Check divisibility by 8: Last 3 digits = 79y

    Try y = 2 тЖТ 792 ├╖ 8 = 99 тЬЕ

    Now check sum:

    2 + 4 + 6 + x + 1 + 7 + 9 + 2 = (31 + x)

    x = 5 тЖТ 36 тЬЕ

    Required value = (5 + 2├Ч2) = (5 + 4) = 9

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