In each of the following number series, the wrong number is given, find out that number.

1.5, 2.5, 7, 24, 110, 505

- 2.5
- 505
- 7
- 110
- 24

Option 4 : 110

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The series follows the following pattern:

1.5 × 1 + 1 = 2.5

2.5 × 2 + 2 = 7

7 × 3 + 3 = 24

24 × 4 + 4 = 100

100 × 5 + 5 = 505

∴ The wrong term in the series is 110.

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