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.
No, 98 is divisible by 2; therefore, it is a composite number.
No, 63 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.
No, 98 is divisible by 2; therefore, it is a composite number.
No, 63 is not prime.
47 is a prime number - but 63 is not a prime number.
No, 63 is not.
The prime factors of 63 are 3 and 7.
81 is a composite number because its factors are more than 2