Question

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

16, 17, 38, 123, 510, 2565

1. 17
2. 2565
3. 38
4. 510
5. 123

Answer 1

Correct Answer - Option 4 : 510

 

16 × 1 + 1² = 17

17 × 2 + 2² = 38

38 × 3 + 3² = 123

123 × 4 + 4² = 508

508 × 5 + 5² = 2565

∴ Wrong term in given number series is 510.