Question
6 of
100
Question Palette
Find the missing number: 16, 33, 65, 131, 261, ____.
Correct Option:
A
Explanation
The pattern is ×2 + 1, ×2 − 1 alternately: 16 × 2 + 1 = 33, 33 × 2 − 1 = 65, 65 × 2 + 1 = 131, and 131 × 2 − 1 = 261. Therefore 261 × 2 + 1 = 523.
