Question

In the following number series, a wrong number is given. Find out the wrong number.

12, 24, 72, 289, 1440, 8640

1. 8640
2. 1440
3. 289
4. 12
5. None of these

Answer 1

Correct Answer - Option 3 : 289

Given:

12, 24, 72, 289, 1440, 8640

Calculation:

The series follows the following pattern

12 × 2 = 24

24 × 3 = 72

72 × 4 = 288

288 × 5 = 1440

1440 × 6 = 8640

∴ The wrong term in this series is 289.