Question

how many multiples of 4 lie btw 20 and 250​

Answer 1

Answer:

multiple lie b/w 20 and  250

A = 24 , L = 248 , D= 4

248 = 24+(n-1)4

==> 248-24 = (n-1)4

==> 224/4 = n-1

==> 56 = n-1

==> 57 =n

Answer 2

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 58 multiples of 4 lie between 20 and 250.