SSC CPO 2025 PYQ — Question 4

SSC CPO - 11 Dec 2025 - Shift 1 • Reasoning • Q4

Find the missing number in the series.
8, 13, 21, 34, 55, ?, 144

Show answer & explanation

Correct answer: D

Explanation

Series: 8, 13, 21, 34, 55, ?, 144

Pattern:

Each term = sum of previous two terms

Check:

8 + 13 = 21

13 + 21 = 34

21 + 34 = 55

Next:

34 + 55 = 89

55 + 89 = 144

Hence, the correct answer is option 4.