SSC Stenographer 2025 PYQ — Question 89

SSC Stenographer - 06 Aug 2025 - Shift 1 • Reasoning • Q89

Select the correct option that will complete the series. (2, 7), (3, 13), (5, 31), ?, (11, 133)

Show answer & explanation

Correct answer: C

Explanation

First numbers are consecutive prime numbers:

2, 3, 5, 7, 11

Now check rule for second number:

2 → 7 = 2² + 3

3 → 13 = 3² + 4

5 → 31 = 5² + 6

11 → 133 = 11² + 12

So missing pair:

First number = 7

Second number = 7² + 8 = 49 + 8 = 57

Hence, the correct answer is option 3.