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

You are not logged in. #26 20050527 03:53:39
Re: Problem24= 3x8 School is practice for the future. Practice makes perfect. But  nobody's perfect, so why practice? #28 20050527 09:29:34
Re: ProblemI've got the answer...at least I think so.... #29 20050527 09:36:11
Re: ProblemIts about half past midnight, but I just thought of a genius answer (that doesn't have factorials) and I couldn't wait to share! #30 20050530 15:47:07
Re: ProblemSo impressed with both solutions ... ! "The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  Leon M. Lederman #33 20050530 20:09:34
Re: ProblemLike, this page. School is practice for the future. Practice makes perfect. But  nobody's perfect, so why practice? #35 20050530 20:30:58
Re: ProblemThat page. School is practice for the future. Practice makes perfect. But  nobody's perfect, so why practice? #36 20050530 21:08:23
Re: Problem"Click and ye shall find" "The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  Leon M. Lederman #37 20050531 17:14:27
Re: ProblemOhh! I see. Is there are way for you to make all links colourful or underlined or something in your forum? You can never tell if it is linked or not... or is that just me? #38 20050531 18:06:02
Re: ProblemOh... I wonder why not. It is underlined in Internet Explorer and Firefox on my PC. "The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  Leon M. Lederman #39 20050531 18:10:10
Re: ProblemOkie dokie, fixed it... I'm using firefox. #40 20050602 22:12:18
Re: ProblemWell, the answer is not easy, but it exists: #43 20060604 12:35:15
Re: Problem
And plus, you realise that this post is one year old? Almost exactly. #44 20060604 17:27:08
Re: ProblemInteresting... Can't you make some program, which gives all possible solutions? IPBLE: Increasing Performance By Lowering Expectations. #45 20060604 18:34:43
Re: ProblemMaking progress... IPBLE: Increasing Performance By Lowering Expectations. #46 20060604 19:08:17
Re: ProblemMy program is ready. And guess whatthere aren't another solutions except: IPBLE: Increasing Performance By Lowering Expectations. #47 20060604 19:10:31
Re: ProblemThis program was personal challenge. Last edited by krassi_holmz (20060604 19:17:46) IPBLE: Increasing Performance By Lowering Expectations. #48 20060604 19:20:35
Re: ProblemHere's the code (Mathematica, rewritten, but really messy and hardtounderstand): Code:K[n1_, n2_] := Union[{n1 + n2, n1  n2, n1*n2, n1/n2}]; KK[list_, num_] := Union[Flatten[Table[K[list[[i]], num], {i, 1, Length[list]}]]]; KKK[list1_, list2_] := Union[Flatten[Table[KK[list1, list2[[i]]], {i, 1, Length[list2]}]]]; d[a_, b_, c_, d_, f_] := { (*abcdfff*) f[{a}, f[{b}, f[{c}, {d}]]], (*abcfdff*) f[{a}, f[f[{b}, {c}], {d}]], (*abcffdf*) f[f[{a}, f[{b}, {c}]], {d}], (*abfcdff*) f[f[{a}, {b}], f[{c}, {d}]], (*abfcfdf*) f[f[f[{a}, {b}], {c}], {d}] } d[l_, f_] := d[l[[1]], l[[2]], l[[3]], l[[4]], f]; dd[l_, f_] := dd[l[[1]], l[[2]], l[[3]], l[[4]], f]; dd[a_, b_, c_, d_, f_] := ( Print["abcdfff:", f[{a}, f[{b}, f[{c}, {d}]]]]; Print["abcfdff:", f[{a}, f[f[{b}, {c}], {d}]]]; Print["abcffdf:", f[f[{a}, f[{b}, {c}]], {d}]]; Print["abfcdff:", f[f[{a}, {b}], f[{c}, {d}]]]; Print["abfcfdf:", f[f[f[{a}, {b}], {c}], {d}]]; ) p = Permutations[{3, 3, 8, 8}]; res = Table[Union[Flatten[d[p[[i]], KKK]]], {i, 1, Length[p]}]; Union[Flatten[res]] Could explain and rewrite it later. IPBLE: Increasing Performance By Lowering Expectations. 