25 is a composite number. A composite number is a positive integer that has at least one positive divisor other than one or itself. In other words, it can be formed by multiplying two smaller positive integers.
To determine whether 25 is prime or composite, we can check its divisors. The number 25 can be divided evenly by 1, 5, and 25. Since it has divisors other than 1 and itself, it is not a prime number. Specifically, 25 is the square of 5 (5 × 5 = 25), which clearly shows that it is a composite number.