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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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