Math, asked by TIJILSIKKA, 1 month ago

1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+

Answers

Answered by titusquantam69

0

210

1+2+3+....+20 = 20(20+1)/2 = 210

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