21, 9, 21, 11, 21, 13, 21 what would be the next answer

Solution (By Examveda Team)

Let's break down this number pattern to find the next number!

Notice that the number 21 appears frequently.

If we look at the sequence without the 21s, we have: 9, 11, 13.

This sequence is increasing by 2 each time. (9 + 2 = 11, 11 + 2 = 13)

So, the next number in *that* sequence would be 13 + 2 = 15.

The full sequence alternates between 21 and the increasing numbers.

Therefore, the next number in the sequence is 15.

So the correct answer is: Option B: 15