To determine if 1575 is a prime number or a composite number, we simply look at the factors for 1575.
If the factors of 1575 are only 1575 and 1, then we know that 1575 is a prime number. Otherwise, 1575 is a composite number.
To explain better, if 1575 is only divisible by 1 and 1575, then it is a prime number, and if 1575 is divisible by more than 1575 and 1, then it is a composite number.
The factors of 1575 are as follows:
1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 63, 75, 105, 175, 225, 315, 525, 1575
Therefore, since 1575 is divisible by more than one and itself, the answer to the
question "Is 1575 prime or composite?" is highlighted in blue below.
composite
Is 1576 prime or composite?
OK. Now you know that 1575 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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