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      Question

      Four number-pairs have been given, out of which, three are alike in some manner and one is different. Select the number-pair that is different from the rest.

      A 48 – 576 Correct Answer Incorrect Answer
      B 57 – 684 Correct Answer Incorrect Answer
      C 82 – 820 Correct Answer Incorrect Answer
      D 63 – 554 Correct Answer Incorrect Answer

      Solution

      The 2nd number is the product of sum of digits of 1st number and the 1st number. In option 'a', 48 – 576 → [48 X (4 + 8)] = [48 X 12] = 576 In option 'b', 57 – 684 → [57 X (5 + 7)] = [57 X 12] = 684 In option 'c', 82 – 820 → [82 X (8 + 2)] = [82 X 10] = 820 In option 'd', 63 – 554 → [63 X (6 + 3)] = [63 X 9] = 567 ≠ 554

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