Composite Numbers

30,000,000 = 3 x 10^7

No.

Composites are the numbers which have more than 2 factors. The 5 composites after 12 are 14,15,16,18 and 20.

31 is a prime number because it has only 2 factors which are itself and one

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. 4536 is composite.

21, 22, 24, 25, 26, 27, and 28.

That's seven of them.

Yes. It ends in 5 so it is a multiple of 5. 5 * 77 = 385.

22 is a composite number because it has more than two factors

prime

It is a composite number.

prime

262331 is a prime number

yes because it is in the 5x 2x 10x and 1x tables xx

abbey

135 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.

Okay I think it is 2520.

First 4 prime numbers are; 2 3 5 7

First 4 composites are; 4 6 8 9

I put the composites into there prime factor form.

4=2*2

6=2*3

8=2*2*2

9=3*3

Therefore the prime factor of this number had to have three twos, two threes.

It also had to have a 5 and a 7 because of the prime numbers.

So the index form was;

?=2*2*2*3*3*5*7

?=2520

All the even numbers except 2 are composite numbers.

512 is an even number so, it is a composite number.

Yes.

111 is not a prime number. It is a composite number. A prime number is any number whose only factors are 1 and itself. 111's factors are 1, 3, 37, and 111.

Well, it is prime if 111 is base 2 (binary) :P

Composite 2 goes into it

Since 400 is an even number greater than 2, it is divisible by 2 and therefore is not a prime number.

21 and 30, among others.

Prime numbers have just two factors, 1 and itself.

Composite numbers have more than two factors.

Zero is not a prime number.

All even numbers greater than 2 are composite.