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    Question

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

    such that ab = 70 and bc = 45. Find the value of (a + b + c).
    A 24 Correct Answer Incorrect Answer
    B 26 Correct Answer Incorrect Answer
    C 28 Correct Answer Incorrect Answer
    D 30 Correct Answer Incorrect Answer

    Solution

    Given, ab = 70 and bc = 45 Therefore, their H.C.F = b = 5 Therefore, a = 70/5 = 14 And, c = 45/5 = 9 Therefore, a + b + c = 14 + 5 + 9 = 28

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