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    Question

    The second number in the given number pairs is obtained

    by performing certain mathematical operation(s) on the first number. The same operation(s) is/are followed in all the number-pairs except one. Find that odd number-pair.
    A 46 – 56 Correct Answer Incorrect Answer
    B 62 – 70 Correct Answer Incorrect Answer
    C 85 – 98 Correct Answer Incorrect Answer
    D 37 – 48 Correct Answer Incorrect Answer

    Solution

    Second number = First number + (Sum of digits of first number) 46 - 56 = [{46 + (4 + 6)}] = 46 + 10 = 56 62 - 70 = [{62 + (6 + 2) }] = 62 + 8 = 70 85 – 98 = [{85 + (8 + 5) }] = 85 + 13 = 98 37 - 48 = [{37 + (3 + 7)}] = 37 + 10 = 47

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