Which of the following is different from the rest?
Show answer & explanation
Correct answer: D
Explanation
11, 13, 17 are prime numbers, whereas 21 is not prime.
Hence, the correct answer is option (4).
SSC CPO - 9 Dec 2025 - Shift 2 • Reasoning • Q25
Which of the following is different from the rest?
Correct answer: D
Explanation
11, 13, 17 are prime numbers, whereas 21 is not prime.
Hence, the correct answer is option (4).