Question
Which number will replace the question mark (?) in the
following series? 5, 8, 20, 34, 76, 142, ?Solution
5 × 2 − 2 = 8 8 × 2 + 4 = 20 20 × 2 − 6 = 34 34 × 2 + 8 = 76 76 × 2 − 10 = 142 142 × 2 + 12 = 296
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