To determine if 3780 is a prime number or a composite number, we simply look at the factors for 3780.
If the factors of 3780 are only 3780 and 1, then we know that 3780 is a prime number. Otherwise, 3780 is a composite number.
To explain better, if 3780 is only divisible by 1 and 3780, then it is a prime number, and if 3780 is divisible by more than 3780 and 1, then it is a composite number.
The factors of 3780 are as follows:
1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 27, 28, 30, 35, 36, 42, 45, 54, 60, 63, 70, 84, 90, 105, 108, 126, 135, 140, 180, 189, 210, 252, 270, 315, 378, 420, 540, 630, 756, 945, 1260, 1890, 3780
Therefore, since 3780 is divisible by more than one and itself, the answer to the
question "Is 3780 prime or composite?" is highlighted in blue below.
composite
Is 3781 prime or composite?
OK. Now you know that 3780 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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