Answer: No, 90 is not a prime number, it is a composite number.
Step-by-step explanation:
A composite number is a number that can be divided evenly by more numbers than 1 and itself. It is the opposite of a prime number. The number 90 can be evenly divided by 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45 and 90, with no remainder. Since 90 cannot be divided by just 1 and 90, it is a composite number.
