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    Question

    Four number-pairs have been given, out of which three

    are alike in some manner and one is different. Select the number-pair that is different.
    A 15 - 225 Correct Answer Incorrect Answer
    B 18 - 324 Correct Answer Incorrect Answer
    C 21 - 420 Correct Answer Incorrect Answer
    D 12 - 144 Correct Answer Incorrect Answer
    E 17 - 289 Correct Answer Incorrect Answer

    Solution

    The logic followed here is: In all of the above number pairs, the second number is the square of the first number, except for one pair. 15 ├Ч 15 = 225

    18 ├Ч 18 = 324

    21 ├Ч 21 тЙа 420

    12 ├Ч 12 = 144

    17 ├Ч 17 = 289

    The number pair (21 - 420) does not follow the pattern.

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