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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.

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โˆ™ 2012-05-09 01:00:43
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Q: Is 81 a composite or prime number?
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Related questions

What is 81 is that a prime?

81 is not prime it's a composite number


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


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

81 is an odd 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.


Is 81 prime or a composite?

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


Is 81a composite number or a prime number?

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


81 prime or composite?

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.


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 81 prime or composite numder?

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


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 81a prime?

81 is a Composite Number


Is 81 prime or comsite?

It is a composite number.


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).


What is the composite number as a product of prime number for 81?

81 = 3*3*3*3


Is 81 a prime a number a composite?

Composite because it has more than two factors.


Is eighty-one a composite or prime number?

81 is 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.


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.


Why is 81 prime?

81 is not prime, it is composite.


Is eighty one a composite or prime number?

81 is not a prime number, it is the product of 9 X 9.


Is 81 a composite number?

Yes. One of the reasons are that if you Google it, they say it's a composite #. Second, a prime number has 2 factors: 1 and itself. But 81 has 5 factors:1, 3, 9, 27, and 81.81 is a composite number 3 * 3 * 3 * 3 = 81


What is a composite number that is greater than 80?

How about 81 or any number that is not a prime number.


Which of these numbers are composite 53 81 41 47 31?

If you mean: 53 81 41 47 and 31 then 81 is a composite number while all the rest are prime numbers


Is 71 and 81 co prime?

71 is a prime number because it has only two factors whereas 81 is a composite number because it has more than two factors.


Is 729 a prime or composite number?

Composite; its factors are 1, 3, 9, 27, 81, 243, 729


Which is not composite 72 81 83 90?

It is 83 because it is a prime number