Question

Total number of prime numbers between $90$ and $110$ is

Answer 1

Numbers between $90$ and $110$ are $\{91,92,93,...109\}$
Even numbers are not prime. And
$91=7\times 13$
$93=3\times 21$
$95=5\times 19$
$99=3\times 33$
$105=3\times 35$
$97,101,103,107,109$ are prime