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

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Q: Is eighty one a composite or prime number?
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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 the number 1 composite or prime and why?

1 is neither a prime nor a composite number because it has only one factor (itself (1)). The definition of a prime number is a number that has the factor of one and itself, so one is not prime. The definition of a composite number is a number that has more than 2 factors, so one is not composite. One is a special number.


What composite number that are prime?

A composite number is basically one that is NOT a prime - a composite number is a product of two or more primes.


Why is one a composite number?

ANSWER: One is not a composite number.One is not also a prime number.


Is forty one a prime or composite number?

Composite


Name the two composite numbers that are prime?

No composite numbers are prime. A composite number is a number that can be made by multiplying other numbers. A prime number is made only by one and itself. Therefore no number can be both prime and composite


Is one a prime composite or neither?

The number 1 is neither a prime nor a composite number.


Is 251 a prime or composite number?

It is a prime number, and therefore not a composite number.251 is prime.


Is 222 prime or composite?

Composite A prime number is a number that has only two factors (itself and one) A composite number is a number that has more than two factors.


What is the smallest composite number that is divisible by none of the prime numbers?

If it is a composite number, it is divisible by at least one prime number.


Which number is not a composite number 13-63-61 or 31?

13 prime 63 composite 61 prime 31 prime Well the question should have been either, Which one of these numbers is not a composite number? Or, Which one of these numbers is not a prime number?


What are prime number and composite numbers?

a prime number is a number that you can plus by one