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Find the odd one out: 41, 43, 47, 53, 57

A41
B47
C53
D57
Answer & Solution
Correct answer: D. 57
1. Check each for primality: 41 prime; 43 prime; 47 prime; 53 prime. 2. 57 = 3 × 19 → composite. 3. Therefore 57 is the odd one. _Source: KMAT Karnataka 2022 PYQ Q.93_
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