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    Question

    Four number-pairs are given, out of which three are

    alike in a certain manner and one is different. Choose the different number-pair.
    A 345 : 100 Correct Answer Incorrect Answer
    B 284 : 168 Correct Answer Incorrect Answer
    C 562 : 130 Correct Answer Incorrect Answer
    D 693 : 250 Correct Answer Incorrect Answer

    Solution

    The pattern followed here is: The square of each digit of the first number is added together, and the result is multiplied by 2 to obtain the code. 345: 100 → 2 X (3² + 4² + 5²) = 2 X (9 + 16 + 25) = 2 X 50 = 100 284 : 168 → 2 X (2² + 8² + 4²) = 2 X (4 + 64 + 16) = 2 X 84 = 168 562 : 130 → 2 X (5² + 6² + 2²) = 2 X (25 + 36 + 4) = 2 X 65 = 130 693 : 252 → 2 X (6² + 9² + 3²) = 2 X (36 + 81 + 9) = 2 X 126 = 252

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