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    Question

    In the following question, select the odd pair of

    numbers from the given alternatives.
    A 15 : 144 Correct Answer Incorrect Answer
    B 21 : 361 Correct Answer Incorrect Answer
    C 18 : 256 Correct Answer Incorrect Answer
    D 29 : 729 Correct Answer Incorrect Answer

    Solution

    The logic followed here is: (First number – 2)² = Second number 15 : 144 = (15 – 2)² = 13²  = 169 ≠ 144 21 : 361 = (21 – 2)² = 19²  = 361 18 : 256 = (18 – 2)² = 16²  = 256 29 : 729 = (29 – 2)² = 27²  = 729 Thus, the odd pair is 15 : 144. Hence, the correct answer is (A).

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