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      Question

      Four number-pairs are given, three of which are alike in

      certain manner and one is different. Choose the different number-pair.
      A 587: 607 Correct Answer Incorrect Answer
      B 459: 477 Correct Answer Incorrect Answer
      C 568: 587 Correct Answer Incorrect Answer
      D 897: 928 Correct Answer Incorrect Answer

      Solution

      The pattern followed here is: The sum of digits of 1st number is added to 1st number to obtain the 2 nd number. In option (a) 587: 607 β†’ {587 + (5 + 8 + 7)} = {587 + 20} = 607 In option (b) 459: 477 β†’ {459 + (4 + 5 + 9)} = {459 + 18} = 477 In option (c) 568: 587β†’ {568 + (5 + 6 + 8)} = {568 + 19} = 587 In option (d) 897: 928 β†’ {897 + (8 + 9 + 7)} = {897 + 24} = 921

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