Question
9 25 ? 121 221
337 What should come in place of the question mark (?) in the following number series?Solution
2³ + 1 = 9 3³ - 2 = 25 4³ + 3 = 67 5³ - 4 = 121 6³ + 5 = 221 7³ - 6 = 337
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