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81 is not a Prime number, it is the product of 9 X 9.
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Earn +20 ptsQ: Is eighty one a composite or prime number?
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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.
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
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.
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