What should come at the place of the question mark (?) in the following series? 2, 3, 8, 9, 26, 27, ?

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Accepted Answer

1. Look at pairs: (2, 3), (8, 9), (26, 27).
2. The first of each pair follows the rule $x_{next}=3x+2$, since $8=2	imes3+2$ and $26=8	imes3+2$.
3. So after 26 we get $26	imes3+2=80$.
4. The next term would be $80+1=81$, so the required term is 80.

FINAL_ANSWER: c

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Answer

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