Multiple choice general knowledge math & puzzles Which of the following is a composite number? 37 47 57 67 Reveal answer Fill a bubble to check yourself C Correct answer Explanation A composite number has more than two factors. 37, 47, and 67 are prime numbers. 57 is composite because it is divisible by 3 and 19 ($3 \times 19 = 57$). Thus, 57 is the correct choice.