To determine if 3870 is a prime number or a composite number, we simply look at the factors for 3870.
If the factors of 3870 are only 3870 and 1, then we know that 3870 is a prime number. Otherwise, 3870 is a composite number.
To explain better, if 3870 is only divisible by 1 and 3870, then it is a prime number, and if 3870 is divisible by more than 3870 and 1, then it is a composite number.
The factors of 3870 are as follows:
1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 43, 45, 86, 90, 129, 215, 258, 387, 430, 645, 774, 1290, 1935, 3870
Therefore, since 3870 is divisible by more than one and itself, the answer to the
question "Is 3870 prime or composite?" is highlighted in blue below.
composite
Is 3871 prime or composite?
OK. Now you know that 3870 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.
|
|
