To determine if 1425 is a prime number or a composite number, we simply look at the factors for 1425.
If the factors of 1425 are only 1425 and 1, then we know that 1425 is a prime number. Otherwise, 1425 is a composite number.
To explain better, if 1425 is only divisible by 1 and 1425, then it is a prime number, and if 1425 is divisible by more than 1425 and 1, then it is a composite number.
The factors of 1425 are as follows:
1, 3, 5, 15, 19, 25, 57, 75, 95, 285, 475, 1425
Therefore, since 1425 is divisible by more than one and itself, the answer to the
question "Is 1425 prime or composite?" is highlighted in blue below.
composite
Is 1426 prime or composite?
OK. Now you know that 1425 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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