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      Question

      The sum of two numbers is 16 and their product is 63.

      The sum of their reciprocal is equal to:
      A 63/16 Correct Answer Incorrect Answer
      B 8/63 Correct Answer Incorrect Answer
      C 60/63 Correct Answer Incorrect Answer
      D 16/63 Correct Answer Incorrect Answer

      Solution

      Let the numbers be = a, b a + b = 16 ab = 63 ∴ Sum of the reciprocal of a and b = 1/a + 1/b ⇒ (b + a)/ab ⇒ 16/63

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