Question
What will come in place of the question mark (?) in the following series? 13, 27, 57, 119, ?, 487
Solution
13 × 2 + 1 = 27 27 × 2 + 3 = 57 57 × 2 + 5 = 119 119 × 2 + 7 = 245 245 × 2 + 9 = 499
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