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Numbers with more than two factors are not prime numbers

Q: Which is not a prime number in the 100 square grid?

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100 is a square.

No square number is a prime number, since it has the number you squared as a factor. There are several square numbers less than 100. Just calculate the squares of all numbers, starting with 1, until you reach or pass 100. Then stop.

A prime number can't be divided, then it's not a square

A square number, by definition, cannot be a prime so the answer is there are no such numbers.A square number, by definition, cannot be a prime so the answer is there are no such numbers.A square number, by definition, cannot be a prime so the answer is there are no such numbers.A square number, by definition, cannot be a prime so the answer is there are no such numbers.

Nope - 81 is a square number, and the next one is 100. 89 is actually a PRIME number

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it looks like a 100 square grid with 1 to 100 and you highlight all the prime numbers

100 is a square.

No square number is a prime number, since it has the number you squared as a factor. There are several square numbers less than 100. Just calculate the squares of all numbers, starting with 1, until you reach or pass 100. Then stop.

One; the only even prime number is two.

A prime number can't be divided, then it's not a square

A square number, by definition, cannot be a prime so the answer is there are no such numbers.A square number, by definition, cannot be a prime so the answer is there are no such numbers.A square number, by definition, cannot be a prime so the answer is there are no such numbers.A square number, by definition, cannot be a prime so the answer is there are no such numbers.

There is only one even prime number and that is 2 as all over even numbers can be divided by 2 and 2 is not square so there isn't a number less than 100 that is an even prime square number.

Nope - 81 is a square number, and the next one is 100. 89 is actually a PRIME number

There can't be a prime number that has a square root because the square root would be a factor of the number.

A [perfect] square number, by definition, has a factor which is its square root. As a result it CANNOT be a prime!

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Yes.