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Can a number be both prime and square?
No. A prime number is divisible only by itself and 1. Squares have other factors.
What is the simplest radical form of the square root of 65?
It is already in simplest form! 65 is a prime number. plus 65= 13x5 and those are both prime numbers.
Why can a prime number not have 0 as its digit?
Everything that has 0 as its digit can be divided by both 2, and 5 as well as many more. Therefore it cannot be a prime number.
What number is both a prime number and a multiple of 3?
No number that is a multiple of 3, can be a prime number. A prime number must only be divisible by itself and 1. It cannot be divisible by any other number. Therefore if it is a multiple of 3, then it must be divisible by 3 and hence, not a prime number.
Can a prime number be 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. A number cannot be both.
