Question

Find the sum of integers from 1 to 500 which are multiple of 2 and 5

Answer 1

multiple of 2and 5 = 10+20+30+40+50+60+70+80+90+100+110
+120+130+140+150+160+170+180+190+200
+210+220+230+240+250+260+270+280+290
+300+310+320+330+340+350+360+370
+380+390+400+410+420+430+440+450+460+470+480+490+500
= 550+1550+2550+3550+4550
= 12750