Q:
# Is Zero a Prime Number?

**Zero is not a prime number.** Zero divided by any other number other than itself, is still zero. It should be noted that since zero is neither positive nor negative, it's not considered a composite number, either.

Prime numbers are numbers that can only be divided by 1 and themselves. An example of a prime number would be 7, as the only whole number it can be divided by is 1 or 7. Any other whole number than can be divided by different whole numbers is called composite. An example of a composite number would be 4, as it can be divided by 1, 2 and 4.

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Q:
## What Is Zero Squared?

A: Zero squared is still equal to zero because zero times any real number is zero. Squaring a number simply means to multiply it by itself, or to raise it to ... Full Answer >Filed Under: -
Q:
## Is 21 a Prime Number?

A: The number 21 is not a prime number. Prime numbers are numbers greater than one that are evenly divisible by only 1 and themselves. As the number 21 has mu... Full Answer >Filed Under: -
Q:
## Is 9 a Prime Number?

A: Nine is not a prime number. It is a composite number, because it has more than two factors. A prime number is only divisible by one and by itself, and nine... Full Answer >Filed Under: -
Q:
## Is "0" a Prime Number?

A: The number zero is not a prime number. By definition, a prime number dictates that the number must be a whole number greater in value than one and must be ... Full Answer >Filed Under: