Question

    Which of the following numbers will replace the question mark (?) in the given series?

    54, 53, 57, 48, 64, 39, ?

    A 72 Correct Answer Incorrect Answer
    B 77 Correct Answer Incorrect Answer
    C 73 Correct Answer Incorrect Answer
    D 75 Correct Answer Incorrect Answer

    Solution

    54 – 1² = 53 53 + 2² = 57 57 - 3² = 48 48 + 4² = 64 64 - 5² = 39 39 + 6² = 75

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