Is 51 a composite or prime number?

Answer 1

51 is divisible by 3, therefor it is composite. A Prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1, 2, and 0. 1, 2, and 0 have a different name.

Answer 2

Checking Divisibility by 3 of 51:

Sum of digits: 5+1 = 6

6 is divisible by 3.

Therefore 51 is divisible by 3. (17 x 3 = 51)

Hence 51 is a composite number

Answer 3

51 is a composite number because 3 X 17 = 51 and 1 X 51 = 51.

Answer 4

51 is a composite number because 3 X 17 = 51 and 1 X 51 = 51.
composite
Composite
It is Composite!!

Answer 5

51 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.

Answer 6

51 is composite.

Answer 7

51 = 3 x 17 so it's not a prime number

Answer 8

It is a composite number.

Answer 9

composite

Answer 10

prime