SSC CHSL 2025 PYQ — Question 33

Series:

(3,5), (5,10), (7,15), ?, (11,25)

First numbers:

3, 5, 7, ?, 13

Pattern: +2

3→5→7→9→11

So, the missing first number = 9

Second number:

Pattern: +5

5→10→15→20→25

So, the missing second number = 20

Missing pair = (9,20)

Hence, the correct answer is option (1).