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      Question

      In the following number-pairs, the second number is

      obtained by applying certain mathematical operations to the first number. In three of the four pairs, the same pattern is applied and hence they form a group. Select the number-pair that does NOT belong to this group. A. 2 : 5 B. 4 : 18 C. 6 : 39 D. 8 : 66
      A B Correct Answer Incorrect Answer
      B A Correct Answer Incorrect Answer
      C D Correct Answer Incorrect Answer
      D C Correct Answer Incorrect Answer

      Solution

      22 + 1 = 5 42 + 2 = 18 62 + 3 = 39 82 + 4 = 68 Hence option 4 is the correct answer

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