No.
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
Factors of prime numbers are only 1 and itself. Nothing else.The factors of 98 are 1, 2, 7, 14, 49, and 98. So, it is not prime.
No
No.
31, 37
No. It is divisible by 7. 7*7 = 49
A prime number is a number that can not be divisible by any other number besides one.
17 is a prime number because it has only two factors which are itself and one.
3 x 3 x 7 = 63
81 is a composite number because its factors are more than 2
98 is NOT a prime number. Prime factorization of 98: 2 x 7 x 7
The prime factors of 98 are: 2 7
The prime numbers (factors) of 98 are: 2 and 7
25 and 98 are not prime numbers