What should come in place of the question mark (?) in the following number series? 1 3 9 31 ? 651

What should come in place of the question mark (?) in the following number series?

1 3 9 31 ? 651

(a) 97 (b) 127 (c) 129 (d) 109 (e) None of these

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

Salim Ahmed Kawsar

(c) The series is as follows × 1 + 2, × 2 + 3, × 3 + 4, ...

4 views Answered 2023-02-05 15:29

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