Question:
Find the odd number from the following.
Find the odd number from the following.
Show Hint
Always check for primality when looking for an odd number in a set of odd integers.
Updated On: Jun 26, 2026
- 13
- 37
- 21
- 41
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The Correct Option is C
Solution and Explanation
Step 1: Concept
Categorizing numbers based on their divisors (Prime vs. Composite).
Step 2: Analysis
- 13: Prime number (divisible only by 1 and 13). - 37: Prime number (divisible only by 1 and 37). - 41: Prime number (divisible only by 1 and 41).
Step 3: Comparison
- 21: Composite number (divisible by 1, 3, 7, and 21).
Step 4: Conclusion
21 is the odd one because it is not a prime number. Final Answer: (3)
Categorizing numbers based on their divisors (Prime vs. Composite).
Step 2: Analysis
- 13: Prime number (divisible only by 1 and 13). - 37: Prime number (divisible only by 1 and 37). - 41: Prime number (divisible only by 1 and 41).
Step 3: Comparison
- 21: Composite number (divisible by 1, 3, 7, and 21).
Step 4: Conclusion
21 is the odd one because it is not a prime number. Final Answer: (3)
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