Question

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

74, 92, 115, 143, 176, 217, 257

1. 92
2. 74
3. 143
4. 176
5. 217

Answer 1

Correct Answer - Option 5 : 217

Calculation:

The series follows the following pattern:

⇒ 74 + 18 = 92

⇒ 92 + 23 = 115

⇒ 115 + 28 = 143

⇒ 143 + 33 = 176

⇒ 176 + 38 = 214

⇒ 214 + 43 = 257

∴ The wrong number is 217