How many multiples of 4 lie between 10 and 250?

Solution: Multiple of 4 lie between $10$ and $250$ are,$12,16,20,24\dots 248$
So, it is an $AP$ with starting term, $a=12$ and difference, $d=4$
If $n$ is the total number of terms, then,
$a+\left(n-1\right)d=248$
$12+4\left(n-1\right)=248$
$4\left(n-1\right)=236$
$n-1=59\Rightarrow n=60$
So, there are $60$ multiples of 4 lie between 10 and 250.