Jesse lists four factor pairs of 72 as 2 x 36, 4 x 18, 6 x 12, and 8 x 9. Which factor pair has a prime number?
The factor pair 2 x 36 does not have a prime number because 36 is not a prime number. The factor pair 6 x 12 does not have a prime number because 12 is not a prime number. The factor pair 8 x 9 does not have a prime number because both 8 and 9 are not prime numbers.
Therefore, the only factor pair that has a prime number is 4 x 18. Both 4 and 18 are composite numbers, but 18 is divisible by the prime number 2.