Reasoning • Analogy & Odd One OutMedium
Which number is the odd one out: 19, 53, 21, 43?
A. 19
B. 53
C. 21✓ Correct Answer
D. 43
💡 Solution & Explanation
19, 53, 43 are each a prime number. 21 is not a prime number, so it is the odd one out.
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