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      Question

      Three numbers are in the ratio 4:5:6. If the sum of the

      largest and smallest numbers is 60 more than the middle number, what is the largest number?
      A 90 Correct Answer Incorrect Answer
      B 72 Correct Answer Incorrect Answer
      C 68 Correct Answer Incorrect Answer
      D 62 Correct Answer Incorrect Answer
      E 58 Correct Answer Incorrect Answer

      Solution

      Let the numbers be 4x, 5x and 6x 6x + 4x = 5x + 60 10x = 5x + 60 10x - 5x = 60 5x = 60 x = 12 The largest number = 6x = 6 ร— 12 = 72

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