Question
7 29 ? 129 211
349 What should come in place of question mark (?) in the following number series?Solution
2³ - 1 = 7 3³ + 2 = 29 4³ - 3 = 61 5³ + 4 = 129 6³ - 5 = 211 7³ + 6 = 349
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