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    Question

    Three numbers a, b and c are co-prime to each other

    such that ab = 115 and bc = 253. Find the value of (a + b + c).
    A 33 Correct Answer Incorrect Answer
    B 36 Correct Answer Incorrect Answer
    C 38 Correct Answer Incorrect Answer
    D 39 Correct Answer Incorrect Answer

    Solution

    Given, ab = 115 and bc = 253 Therefore, their H.C.F = b = 23 Therefore, a = 115/23 = 5 And, c = 253/23 = 11 Therefore, a + b + c = 5 + 23 + 11 = 39

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