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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.

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โˆ™ 2012-02-26 18:21:29
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Q: 81 prime or composite
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Related questions

What is 81 is that a prime?

81 is not prime it's a composite number


Why is 81 prime?

81 is not prime, it is composite.


Is 81 a prime or composite number?

It is a composite number, you can get 81 by mulitpling 1*81, 3*27, and 9*9.compositeNo the number 81 is not prime it can be divided by nine.composite


Is 81 neither prime or composite?

Composite


Is 81 is a prime or composite?

It is composite.


Is 81 prime composite or neather?

It is composite.


Is 81 a prime or composite or neither?

It is composite.


IS 81 a prime composite or neither?

81 = 92 = 34 So 81 is not prime


Is 81 prime or a composite?

81 is a composite number because it has more than two factors.


What is the prime number of 81 is it even or odd?

81 is an odd composite number.


Is 81 prime or composite numder?

81 is a composite number because its factors are more than 2


Is 81 and 111 co prime numbers?

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.


Is 51 61 71 81 91 a prime or composite?

61 and 71 are prime numbers the rest are composite numbers


Is 81a prime?

81 is a Composite Number


Is 81 prime or comsite?

It is a composite number.


Is 81 a prime number?

81 is not a prime number. Its positive integer factors are: 1, 3, 9, 27, 81.81 is a Composite Number.


What are composite not prime numbers 3 27 38 81?

3 is prime. Rest are composite.


What times what equals 81?

1 times 81 3 times 27 9 times 9


Is 81 a composite or prime number?

81 is a composite number because it has more factors than 1 and itself. The factors of 81 are 1, 3, 9, 27, and 81.


Is 81 a prime a number a composite?

Composite because it has more than two factors.


Is 81 a prime number or a composite number?

81 is a composite number because it has factors other than 1 and itself. 81 is not a prime number. 81 = 3 * 3 * 3 * 3. Its positive integer factors are: 1, 3, 9, 27, 81.


Is 81 a prime composite or neither number?

81 is a composite number as it has factors other than 1 and itself (3, 27 and 9).


Which is prime or composite 13 51 18 31 23 15 66 81?

Prime: 13, 23, 31 Composite: 15, 18, 51, 66, 81


What is the greatest common factor of 29 and 81?

The greatest common factor of a prime number & a composite number is 1 if the composite number is not divisible by the prime number. 81(composite number) is not divisible by 29(prime number) so, gcf(29,81) = 1.


Is 81a composite number or a prime number?

81 is a composite number and it is also a square number