Question
1+2+3+4+....+1997+1998+1999+2000
Answers
oobleck
As Gauss discovered, you can pair up the ends, resulting in
200/2 pairs that total 2001
So, the sum is
100* 2001 = _____
200/2 pairs that total 2001
So, the sum is
100* 2001 = _____