Question
Which of the following numbers will replace the question
mark (?) in the given series? Â 13, 41, 81, 245, 489, ?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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