Question

9, 17, 33, 65, ?

• A. 117
• B. 119
• C. 129
• D. 99

Answer 1

Answer:

C. 129

→ (9 × 2 -1) = 17 → (17 × 2 -1) = 33 → (33 × 2 -1) = 65 → (65 × 2 -1) = 129