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

You are not logged in. #1 20131208 19:21:54
eightdigits numbers...Find the number of 8digit numbers the sum of whose digits is 4. friendship is tan 90°. #2 20131208 20:08:48
Re: eightdigits numbers...Hi niharika_kumar; 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. #3 20131208 21:05:56
Re: eightdigits numbers...The possible combinations of nonzero digits in such an 8digit number are as follows: Last edited by Nehushtan (20131208 21:06:35) 134 books currently added on Goodreads #4 20131209 22:01:20
Re: eightdigits numbers...thank you so much. friendship is tan 90°. 