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 18 : 42 Correct Answer Incorrect Answer
    B 1 : 6 Correct Answer Incorrect Answer
    C 15 : 34 Correct Answer Incorrect Answer
    D 7 : 18 Correct Answer Incorrect Answer

    Solution

    1 x 2 + 4 = 6 15x 2 + 4 = 34 7x 2 + 4 =18 18 x 2 +6 = 42      

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