31 is a Prime number because its only factors are 1 and itself.
91 has factors other than 1 and itself, so it is not a prime number. Its factors are 1, 7, 13, and 91. Therefore, it is a composite number.
91 is a composite number. This is because composite numbers are any number that has another factor besides one and itself. Therefore, since 7 and 13 are factors of 91 that makes it a composite number.
91 is not a prime number. 91 is a composite number having the factors 1, 7, 13, and 91.
Only 91 is the prime number, 57 is a composite number because it is divisible by 3. ------------------------------- 57 and 91 are both composite. 57 = 19*3, and 91 = 13*7.
31 and 61 are prime, the rest composite.
both are composite numbers 51 is divisible by 1,3,17,51 and 91 by 1,7,13,91
91 is composite.
The only composite number in this list is 91. The others are prime numbers.
91 is a Composite Number.
91 is a composite number. This is because composite numbers are any number that has another factor besides one and itself. Therefore, since 7 and 13 are factors of 91 that makes it a composite number.
21 is divisible by 3 and 7, so it is composite. 91 is divisible by 7 and 13, so it is composite. 51 is divisible by 3 and 17. 31 is divisible by only 1 and itself, so it is the prime number.
91 is a composite number. The factors of 91 are 7 and 13
91 is a prime number.
91 is composite. The others are prime number
91=13x7
91 is composite.
91 is a composite number because it has more than 2 factors
91 is a composite number. The factors of 91 are 7 and 13.139 is a prime number13 is a prime number29 is a prime number.