600 +590+580+------------------------+20+10
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570+560+550+540+530+520+510+500+490+480+470+460+450+440+430+420+410+400+390+380+370+360+350+340+330+320+310+300+290+280+270+260+250+240+230+220+210+200+190+180+170+160+150+140+130+120+110+100+90+80+70+60+50+40+30
sanskriti37:
What is the sum of this all number given in question
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Answer:
10 + (1+2+3...….…...……+58+59+60)
= 10×60×61÷2
= 300×61
= 18300
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