Question

Fill in the blanks by choosing the appropriate word from the bracket.

Numbers more than $1$ that have only two factors are called _________ numbers and numbers more than $1$ that have more than two factors are called _________ numbers. Also, every even except $2$ is a ___________ numbers. (composite/prime)

• A. prime, composite
• B. composite

Answer 1

Definition of prime and composite numbers:

A prime number is a number that has only two factors, $1$ and the number itself.

A few examples are $2,3,5,7,11,$ etc. Note that $2$ is the only even prime number. Every other prime number is odd.

A composite number is a number that has more than $2$ factors.

A few examples are $4,6,8,10,$ etc.

Thus, numbers having only two factors are called prime numbers and numbers having more than $2$ factors are called composite numbers.

Hence, numbers more than $1$ that have only two factors are called prime numbers and numbers more than $1$ that have more than two factors are called composite numbers. Also, every even except $2$ is a composite numbers.