Question

What should come in the place of question mark (?) in the given series ? 10 11 13 17 25

• A. 42
• B. 40
• C. 43
• D. 41

Answer 1

Answer:

D. 41

Let’s examine the pattern.

Series:
10, 11, 13, 17, 25, ?

Find the differences:
11 − 10 = 1
13 − 11 = 2
17 − 13 = 4
25 − 17 = 8

The differences are doubling each time:
1, 2, 4, 8 → next difference = 16

So, the next term is:
25 + 16 = 41