Question

Find the sum of integers from 1-500 which are multiple of 2or5

Answer 1

hey sis,

The numbers which are multiple of 2 as well as 5 are also multiple of 10.So, they form an arithmetic progression starting with 10 and common difference of the progression is 10.

Here,number of the terms of A.P. from 1 to 500 is =(500–10)/10+1=50

So,sum=50*(2*10+(50–1)*10)/2=12750

have a gr8 day,........

Answer 2

ANSWER IS - 5000

NOW U CAN DOO

ITS GOOD