Free Set
Question
Find odd one out: 2, 3, 5, 7, 9, 11
Options
A2
B3
C9 Correct Answer
D11
Correct Answer & Explanation
Option C: 9
Rationale
All except 9 are prime numbers. 2,3,5,7,11 are prime divisible only by 1 and itself. 9 is composite 3x3 not prime. So odd one is 9.
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