80 is a prime or composite?
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 80 can be evenly divided by 1, 2, 4, 5, 8, 10, 16, 20, 40 and 80, with no remainder. Since 80 cannot be divided by just 1 and 80, it is a composite number.