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

You are not logged in. #1 20130122 04:13:22
probability and counting??How many 20digit numbers are such that the sum of their digits is even? I see you have graph paper. You must be plotting something #3 20130122 08:25:37
Re: probability and counting??That doesn't help, I knew that just that i keep losing count. I see you have graph paper. You must be plotting something #4 20130122 12:24:26
Re: probability and counting??Hi; In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #5 20130123 11:02:13
Re: probability and counting??Thank you I see you have graph paper. You must be plotting something 