Question

    Select the option that is related to third number-cluster in the same way first number cluster is related to second number-cluster.

    26: 40 :: 39: ?

    A 90 Correct Answer Incorrect Answer
    B 72 Correct Answer Incorrect Answer
    C 81 Correct Answer Incorrect Answer
    D 100 Correct Answer Incorrect Answer

    Solution

    The logic is the sum of the square of the digits of the first and third number is the second and fourth number respectively. For '26: 40' = 2² + 6² = 4 + 36 = 40 Similarly, for '39: ?' = 3² + 9² = 9 + 81 = 90 So, '39' is related to '90' in the same way as '26' is related to '40'. Hence, option A.

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