81 is a composite number. Composite numbers are any number that has more than two factors(one and itself). Therefore, since 3,9, and 27 are factors of 81 that makes it 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. 81 is composite, 111 is prime.
81 is not prime it's a composite number
Composite
81 is not prime, it is composite.
Both 81 and 313968 are composite numbers.
If you mean: 53 81 41 47 and 31 then 81 is a composite number while all the rest are prime numbers
81 is a composite number. Composite numbers are any number that has more than two factors(one and itself). Therefore, since 3,9, and 27 are factors of 81 that makes it a composite number.
61 and 71 are prime numbers the rest are composite numbers
3 is prime. Rest are composite.
number of composite numbers between 81 and 100 = 15composite numbers between 81 and 100 = 82, 84, 85, 86, 87, 88, 90, 91, 92, 93, 94, 95, 96, 98, 99
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. 81 is composite, 111 is prime.
No, 41, 51, 71, 81, and 91 are not prime numbers. A prime number is a natural number greater than 1 that cannot be formed by multiplying two smaller natural numbers. In this case, all the numbers listed can be divided by numbers other than 1 and themselves, making them composite numbers.
No because they are all composite numbers having more than two factors
81 is not prime it's a composite number
81, 82, 84, 85, 86, 87, 88. 80 and 90 are composite too
The composite numbers are: 72, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85, 86 ,87, 88