13, 17, 19, 23, 27 - which number is different?
Show answer & explanation
Correct answer: C
Explanation
Check the properties of the given numbers:
• 13, 17, 19, 23 are all prime numbers (divisible only by 1 and themselves).
• 27 is a composite number ().
Hence, 27 is the odd one out.
Therefore, the correct option is (C).