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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 → {587 + (5 + 8 + 7)} = {587 + 20} = 607 In option (b) 459: 477 → {459 + (4 + 5 + 9)} = {459 + 18} = 477 In option (c) 568: 587→ {568 + (5 + 6 + 8)} = {568 + 19} = 587 In option (d) 897: 928 → {897 + (8 + 9 + 7)} = {897 + 24} = 921

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