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    Question

    Which of the following numbers will replace the question

    mark (?) in the given series?   13, 41, 81, 245, 489, ?
    A 1369 Correct Answer Incorrect Answer
    B 1469 Correct Answer Incorrect Answer
    C 1521 Correct Answer Incorrect Answer
    D 1449 Correct Answer Incorrect Answer

    Solution

    The logic followed here is: (13 × 3) + 2 = 39 + 2 = 41 (41 × 2) - 1 = 82 - 1 = 81 (81 × 3) + 2 = 243 + 2 = 245 (245 × 2) - 1 = 490 - 1 = 489 (489 × 3) + 2 = 1467 + 2 = 1469 Hence, the correct answer is (B).

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