Many people get stuck on this brain teaser at first glance:
2, 4, 8, ___, 32
The missing number is 16.
Each number is doubled:
2 × 2 = 4
4 × 2 = 8
8 × 2 = 16
16 × 2 = 32
This simple puzzle is a reminder that the answer often becomes clear once you recognize the pattern.