Question

Complete the series given below by choose the missing term out of the given alternatives.
0, 1, 3, 7, 15, ?, 63

• A. 18
• B. 21
• C. 31
• D. 41

Answer 1

Answer: (C)

31

Differences are $2^0{.2}^1,2^2,2^3$. and so on.

So, next term will be 15+ $2^4$ = 31 (option C)