Question

Select the number that can replace the question mark (?) in the following series.

2, 4, 5, 19, 71, ?

1. 368
2. 390
3. 361
4. 349

Answer 1

Correct Answer - Option 3 : 361

The pattern followed is;

2 × 1 = 2 + 2 = 4

4 × 2 = 8 - 3 = 5

5 × 3 = 15 + 4 = 19

19 × 4 = 76 - 5 = 71

71 × 5 = 355 + 6 = 361

Hence, the answer is 361.