Which number replaces the question mark?
8 13 5 22 9 4 37 15 6 ?

Question: Which number replaces the question mark?

Solution:
এখানে,
13 - 8 = 5
22 - 13 = 9
9 - 5 = 4
37 - 22 = 15
15 - 9 = 6
6 - 4 = 2

সুতরাং, প্রশ্নবোধক চিহ্নের স্থানে 2 বসবে।