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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 12 : 140 Correct Answer Incorrect Answer
    B 15 : 221 Correct Answer Incorrect Answer
    C 8 : 60 Correct Answer Incorrect Answer
    D 11 : 112 Correct Answer Incorrect Answer

    Solution

    The pattern followed in this series is: the second number is obtained by squaring the first number and then subtracting 4. A) 12 : 140 → 12² - 4 = 144 - 4 = 140 B) 15 : 221 → 15² - 4 = 225 - 4 = 221 C) 8 : 60 → 8² - 4 = 64 - 4 = 60 D) 11 : 117 → 11² - 4 = 121 - 4 = 117

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