Question

Which is the smallest odd composite number? How many even prime numbers are there?

Answer 1

Determine the smallest odd composite number and also find the even prime numbers there.

A composite number is one that has components other than $1$ and the number itself. A composite number has more than two elements.

A composite number is a number with at least $3$ factors. From number $1$ we can check whether the number is composite or not.

$1=$Neither prime nor composite.

$3,5,and7$ are prime.

$9$ is a composite as it is a multiple of more than two numbers, or is divisible by three numbers i.e. $1,3,$and itself. Hence, the smallest natural odd composite number is $9$. The number of even primes $=1$and the even prime is $2$.

Hence, the $9$ is the smallest odd composite number and there is only $1$an even prime number that is $2$.