Because 3 is a divisor of 51. 17*3=51.
Because it can be evenly divided by numbers other than 1 and itself. Example 3 times 17=51
51 is composite.
51 composite, 61 prime.
51 is composite.
51 is a composite number 3 x 17 = 51
It is composite.
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.
17 multiplied by 3 equals 51, and therefore 51 is a composite number.Composite.
It is composite.
24 and 51 are composite, 3 is prime.
composite
Just 51
51