SSC Selection Post 2025 PYQ — Question 89

4, 9, 21, 47, ?

Find the difference:

9 − 4 = 5

21 − 9 = 12

47 − 21 = 26

Now the series of differences:

5, 12, 26

Here's the pattern:

5 × 2 + 2 = 12

12 × 2 + 2 = 26

26 × 2 + 2 = 54

So the next term:

47 + 54 = 101

Correct answer: A) 101