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    Question

    What will come in place of the question mark (?) in the

    following series? 15, 16, 25, 50, 99, 180, ?
    A 305 Correct Answer Incorrect Answer
    B 306 Correct Answer Incorrect Answer
    C 307 Correct Answer Incorrect Answer
    D 308 Correct Answer Incorrect Answer
    E 301 Correct Answer Incorrect Answer

    Solution

    15 + 12 = 16 16 + 32 = 25 25 + 52 = 50 50 + 72 = 99 99 + 92 = 180 180 + 112 = 301

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