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      Question

      If 'U' is the prime number 17, then find the fourth

      proportion of (U + 3), (U - 7) and (U + 5).
      A 11 Correct Answer Incorrect Answer
      B 12 Correct Answer Incorrect Answer
      C 10 Correct Answer Incorrect Answer
      D 9 Correct Answer Incorrect Answer

      Solution

      'U' = 17

      So, the numbers are 20, 10 and 22.

      Let fourth proportion be 'm'.

      So, 20m = 10 Γ— 22

      Or, 20m = 220

      Or, 'm' = 11

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