Question

Write down all the prime numbers between:

$16and27$

Answer 1

A prime number is an integer, or whole number, that has only two factors — 1 and itself.

The numbers between $16and27$ are $17,18,19,20,21,22,23,24,25,26$

$17$ is a prime number because $17$ cannot be divided evenly by any number except for $1$ and $17$.

$18$ is not a prime number because factors of $18$ are $1,2,3,6,9,18$. It has more than two factors, So it is not a prime number.

$19$ is a prime number because $19$ cannot be divided evenly by any number except for $1$ and $19$.

$20$ is not a prime number because factors of $20$ are $1,2,4,5,10,20$. It has more than two factors, So it is not a prime number.

$21$ is not a prime number because factors of $21$ are $1,3,7,21$. It has more than two factors, So it is not a prime number.

$22$ is not a prime number because factors of $22$ are $1,2,11,22$. It has more than two factors, So it is not a prime number.

$23$ is a prime number because $23$ cannot be divided evenly by any number except for $1$ and $23$.

$24$ is not a prime number because factors of $24$ are $1,2,3,4,6,8,12,24$. It has more than two factors, So it is not a prime number.

$25$ is not a prime number because factors of $25$ are $1,5,25$. It has more than two factors, So it is not a prime number.

$26$ is not a prime number because factors of $26$ are $1,2,13,26$. It has more than two factors, So it is not a prime number.

Hence,$17,19,23$ are the prime numbers between $16and27$