Composite Numbers

The numbers, "77" is not a prime number - it can be evenly divided by 1, 7, 11, and 77.

Integers greater than 1 can be prime or composite. No integer can be prime composite.

Not a prime as it ends in 0 so is at

least divisible by 10

There are several advanced methods, but they are all much more complicated than checking for factors. They are, however, efficient for extremely large numbers (such as the 300-digit or so numbers commonly used in cryptography).If you are actually interested in these (more complicated) methods, check the Wikipedia, or do a Google search, on the topic "primality tests".

No because it's prime number having only 2 factors which are itself and one

2 x 2 x 2 x 2 x 2 x 2 x 2 x 5 x 5 x 5 = 16,000

27 x 53 = 16,000

Just keep dividing by 2 and 5 and you'll find them all.

A prime number has exactly two factors, 1 and the number itself. Since 232 is an even number, it also has 2 as a factor so it is a composite number.

2,401=7x7x7x7, so it is composite.

I assume that if your 11 years old, you're in Grade 6, right?

Anyway, 1 is not a prime number or a composite number. A prime number is a number with only two factors: 1 and itself, while a composite number is a number with more than two factors. 1 is not either of those because its only factor is 1. Therefore, you could say it's a "special number".

20 is a composite number. A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.

728 is a composite number. A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 have a different name.

A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite. 1000 is composite.

It is prime.

A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite. 53 is prime.

15 and 16

A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.

Composite.

170 is not prime. 170 = 2 * 5 * 17

It is composite because it can be divided by something other than itself and one. (For example, it can be divided by two.)

Both composite.

39 is a Composite Number.

It is composite.

38 is a composite number. A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.

The concept of prime or composite is relevant only for integers larger than 1, so it is neither.

30, 32, 33, 34, 35, 36, 38, 39, 40, 42, 44, 45, 46, 48, 49, 50

903 = 3 x 7 x 43, so it is composite