Question

In the following number series, only one number is wrong. Find out that number:

9, 19, 40, 83, 170, 340

Options

• 340

• 170

• 83

• 40

Answer 1

340

Explanation:

The pattern is as follows:

9 × 2 + 1 = 19

19 × 2 + 2 = 40

40 × 2 + 3 = 83

83 × 2 + 4 = 170

170 × 2 + 5 = 345

Hence, the wrong number in the series is 340.