To determine if 25 is a prime number or a composite number, we simply look at the factors for 25.
If the factors of 25 are only 25 and 1, then we know that 25 is a prime number. Otherwise, 25 is a composite number.
To explain better, if 25 is only divisible by 1 and 25, then it is a prime number, and if 25 is divisible by more than 25 and 1, then it is a composite number.
The factors of 25 are as follows:
1, 5, 25
Therefore, since 25 is divisible by more than one and itself, the answer to the
question "Is 25 prime or composite?" is highlighted in blue below.
composite
Is 26 prime or composite?
OK. Now you know that 25 is a composite number. Use our logic above and see if
you can figure out if the next number on our list is prime or composite before you check your answer.
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