a prime #
Positive times negative equals negative.
17/9 is 1 and 8/9 as a mixed number
Do you mean a "prime" number? If so, a prime number is a number that can only be divided evenly by itself or the number one.
53 is a prime number if that is what you mean.
No
No.
31, 37
No. It is divisible by 7. 7*7 = 49
17 is a prime number because it has only two factors which are itself and one.
3 x 3 x 7 = 63
No, 98 is divisible by 2; therefore, it is a composite number.
81 is a composite number because its factors are more than 2
2 x 2 x 2 x 2 x 2 x 2 or 2^6
2 x 8 = 16 4 x 4 = 16
Prime numbers have two factors, composite numbers have more than two.
747 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.