How many multiples of 4 lie between 10 and 250?

How many multiples of 4 lie between 10 and 250?

First term in this series will be 12. also the last digit will be 248. the the series will be 12,16,20……….248. it is a arithmetic series with first term a=12 and common difference of 4. with last term as 248. so 248=12+(n-1)x4 (lets assume it has n such numbers.) (n-1).4= 248–12=236 n-1=236/4=59 n=59+1=60. so 60 multiples of 4 lie between 10 and 250.