To determine if 1380 is a prime number or a composite number, we simply look at the factors for 1380.
If the factors of 1380 are only 1380 and 1, then we know that 1380 is a prime number. Otherwise, 1380 is a composite number.
To explain better, if 1380 is only divisible by 1 and 1380, then it is a prime number, and if 1380 is divisible by more than 1380 and 1, then it is a composite number.
The factors of 1380 are as follows:
1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 23, 30, 46, 60, 69, 92, 115, 138, 230, 276, 345, 460, 690, 1380
Therefore, since 1380 is divisible by more than one and itself, the answer to the
question "Is 1380 prime or composite?" is highlighted in blue below.
composite
Is 1381 prime or composite?
OK. Now you know that 1380 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.
|
|
