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

1, 8, 9, ?, 25, 216, 49 

(a) 60 (b) 64 (c) 70 (d) 75 (e) None of these

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1 Answers

(b) Can you see that the pattern is
12, 23, 32, 43, 52, 63, 72

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