Question

Choose the correct alternative that will continue the same pattern and replace the question mark in the given series.

$5,6,9,15,?,40$

• A. $21$
• B. $25$
• C. $27$
• D. $33$

Answer 1

The correct option is B $25$

5, 6, 9, 15, ?, 40
The pattern is + 1, + 3, + 6,....., i.e. + 1, + (1, + 2), + (1 + 2 + 3),.....
Thus, the missing term is $15+10=25$