Question

Addition of a number from 1 to 140 which is divisible by 4

Answer 1

First no.=a=4
Difference=d=4
Last no.=l=140
l=a+(n-1)d
140=4+(n-1)4
136=(n-1)4
39=n-1
n=40
Addition=Sn=n/2(a+l)
Sn=40/2(4+140)
Sn=20(144)
Sn=2880..

Answer 2

heya dear

plz refer the attachment which is given above for your answer! !!