Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ ¹ ² ³ °
 

You are not logged in. #1 20081102 06:46:30
how manyIt is possible to replace each of the ± signs below by either – or + so that #2 20081102 07:06:44
Re: how many1+2+3+4+5+...+76  77 + 78+...+82  83  84  ...  95  96 = 1996. Why did the vector cross the road? It wanted to be normal. 