To determine if 7890 is a prime number or a composite number, we simply look at the factors for 7890.
If the factors of 7890 are only 7890 and 1, then we know that 7890 is a prime number. Otherwise, 7890 is a composite number.
To explain better, if 7890 is only divisible by 1 and 7890, then it is a prime number, and if 7890 is divisible by more than 7890 and 1, then it is a composite number.
The factors of 7890 are as follows:
1, 2, 3, 5, 6, 10, 15, 30, 263, 526, 789, 1315, 1578, 2630, 3945, 7890
Therefore, since 7890 is divisible by more than one and itself, the answer to the
question "Is 7890 prime or composite?" is highlighted in blue below.
composite
Is 7891 prime or composite?
OK. Now you know that 7890 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.
|
|
