Find the odd one out: 4, 9, 16, 20, 25
Show answer & explanation
Correct answer: D
Explanation
4 = 2² (perfect square)
9 = 3² (perfect square)
16 = 4² (perfect square)
25 = 5² (perfect square)
But 20 is not a perfect square of any number.
SSC CHSL - 24 Nov 2025 - Shift 2 • Reasoning • Q31
Find the odd one out: 4, 9, 16, 20, 25
Correct answer: D
Explanation
4 = 2² (perfect square)
9 = 3² (perfect square)
16 = 4² (perfect square)
25 = 5² (perfect square)
But 20 is not a perfect square of any number.