Art of Problem Solving Forum

Try our innovative online adaptive learning system, Alcumus.
Over 1100 problems and 60+ video lessons. FREE!

The time now is Mon Dec 07, 2009 11:09 am
All times are UTC - 8

View posts since last visit
View unanswered posts

Combinatorics Proposed & Own Problems

Moderators: High School Olympiad Moderators, darij grinberg, freemind, Megus, N.T.TUAN, orl, pbornsztein

Home » Olympiad Section » Combinatorics » Combinatorics Proposed & Own Problems

2328 Topics • Page 1 of 47 • 1, 2, 3, ..., 45, 46, 47 Next

Topics		Author	Replies	Views	Last Post
	permutation.	ayush_2008	1	31	Today, at 8:42 am pleurestique
	Korean Olympiad Finals (2007-2) fkmo 2007-2	Stephen	1	38	Today, at 6:34 am JBL
	combinatorics toughie me not getting it	b555	1	47	Sat Dec 05, 2009 2:40 pm pleurestique
	minimum number of elements in S	b555	0	37	Sat Dec 05, 2009 2:28 pm b555
	A Mixed Function Equation	pmvald	0	39	Fri Dec 04, 2009 11:24 pm pmvald
	problem about table and triangles	Ahiles	1	76	Fri Dec 04, 2009 7:34 am JBL
	Bypassing the Routes	pmvald	0	40	Fri Dec 04, 2009 12:32 am pmvald
	Prove or disprove own identity: binomial coefficients	pfanni	6	172	Thu Dec 03, 2009 11:59 am Mathias_DK
	Smallest value of m Baltic way 2009	uNc	1	263	Thu Dec 03, 2009 3:58 am Johan Gunardi
	erasing some digits Indonesia IMO 2010 TST, Stage 1, Test 5, Problem 4	Raja Oktovin	1	217	Thu Dec 03, 2009 12:11 am Johan Gunardi
	A set with $a_n+a_m\|a_na_m$	pmvald	3	197	Wed Dec 02, 2009 11:08 pm pmvald
	A Permutation of N with $a_i \| a_{i+1}+a_{i+2}$	pmvald	1	73	Tue Dec 01, 2009 6:14 am Johan Gunardi
	Find the sum of all 3 digit numbers satisfying Regional Mathematical Olympiad (RMO-India -2009 - 4th problem)..very easy	srinath.r	3	182	Tue Dec 01, 2009 3:38 am aadil
	no consecutive numbers	The Enigma	3	155	Mon Nov 30, 2009 5:33 am AutumnRose
	coloring the points Indonesia IMO 2010 TST, Stage 1, Test 3, Problem 2	Raja Oktovin	1	228	Mon Nov 30, 2009 12:25 am pleurestique
	binary sequance need help	kai_desmond11	2	137	Sun Nov 29, 2009 7:20 am JBL
	sorry	rationalist	1	115	Sat Nov 28, 2009 6:02 pm cvaneg
	rmo	rationalist	1	110	Sat Nov 28, 2009 1:04 pm pleurestique
	boys and girls shortlist problem of Romania 2004 TST	hxy09	1	358	Sat Nov 28, 2009 1:22 am hxy09
	Cuts of pizza...	Buddy Rich	4	167	Wed Nov 25, 2009 1:59 pm Buddy Rich
	graph turkey TST 2007	Litlle 1000t	4	946	Wed Nov 25, 2009 6:22 am JBL
	Points on a straight line with zero sum	Talegari	1	122	Tue Nov 24, 2009 11:58 am shoki
	another n x n table problem. Romanian JBTST III 2007, problem 3	pohoatza	2	1155	Tue Nov 24, 2009 10:15 am Sashsiam_2
	$\gcd(a,b)+\gcd(b,c) > \gcd(a,c)$	pmvald	1	156	Tue Nov 24, 2009 1:15 am Johan Gunardi
	Combinatorial Function Equation: $n+m \| f^m(n)$	pmvald	0	126	Mon Nov 23, 2009 12:24 am pmvald
	Number of Triangles	pmvald	0	124	Mon Nov 23, 2009 12:23 am pmvald
	Difference between numbers of elements in A-A and A+A Schweitzer 2009	dmitin	11	643	Sat Nov 21, 2009 2:51 pm Fedor Petrov
	Romania 2000 TST	CoBa_c_Kacka	0	161	Tue Nov 17, 2009 1:29 pm CoBa_c_Kacka
	1,2,...,20 on the blackboard Indonesia IMO 2010 TST, Stage 1, Test 4, Problem 1	Raja Oktovin	5	375	Mon Nov 16, 2009 10:18 pm gwy
	crow on regular n-gon Indonesia IMO 2007 TST, Stage 2, Test 5, Problem 3	Raja Oktovin	1	216	Sun Nov 15, 2009 8:24 pm pleurestique
	points and segments Indonesia IMO 2007 TST, Stage 2, Test 2, Problem 4	Raja Oktovin	1	170	Sun Nov 15, 2009 12:41 pm JBL
	calculating the summation Indonesia IMO 2007 TST, Stage 2, Test 1, Problem 4	Raja Oktovin	2	185	Sun Nov 15, 2009 9:49 am nsato
	Class representative voting Own	Johan Gunardi	2	332	Sun Nov 15, 2009 5:53 am Raja Oktovin
	subset of 100 integers	gwy	0	173	Sun Nov 15, 2009 3:57 am gwy
	squares and the family Indonesia IMO 2007 TST, Stage 2, Test 4, Problem 4	Raja Oktovin	0	141	Sat Nov 14, 2009 10:12 pm Raja Oktovin
	party but graph Indonesia IMO 2010 TST, Stage 1, Test 1, Problem 3	Raja Oktovin	1	273	Sat Nov 14, 2009 10:01 am Mashimaru
	Graph and prime numbers Schweitzer 2009	dmitin	1	226	Fri Nov 13, 2009 8:35 am Mashimaru
	Deck of cards and 17-gons Schweitzer 2009	dmitin	0	160	Fri Nov 13, 2009 2:26 am dmitin
	infinite squence own?	hxy09	2	221	Thu Nov 12, 2009 9:40 pm hxy09
	calculation of sum of 2^(f(n)) Indonesia IMO 2010 TST, Stage 1, Test 2, Problem 4	Raja Oktovin	3	287	Thu Nov 12, 2009 9:32 am pleurestique
	Fitting a figure in a square	Scorpius	5	459	Wed Nov 11, 2009 4:15 pm Scorpius
	Croatian Mathematical Olympiad 2006 problem 4	yuyang	1	198	Wed Nov 11, 2009 8:24 am JBL
	Number of subset with no adjacent cells	walrusvn	2	206	Tue Nov 10, 2009 8:01 pm walrusvn
	Operations on a matrix Romania TST 2009, Day 1, Problem 2	Maxim Bogdan	4	500	Mon Nov 09, 2009 12:35 pm kevinatcausa
	Mapping of interior points of spehere and circle An extremely good problem	Agr_94_Math	1	232	Mon Nov 09, 2009 12:22 pm JBL
	tetris covering	Peter	6	361	Mon Nov 09, 2009 4:23 am Peter
	points on a circle are painted	silouan	0	204	Mon Nov 09, 2009 3:42 am silouan
	KGB Agents!	pmvald	3	307	Sun Nov 08, 2009 11:07 pm mavropnevma
	How many are there?	mathVNpro	2	207	Sun Nov 08, 2009 4:46 pm mathVNpro
	Prove that one of the real nos. differ by 1/n from integer	Agr_94_Math	3	306	Sat Nov 07, 2009 11:41 am Mashimaru
Display topics from previous: Sort by:

2328 Topics • Page 1 of 47 • 1, 2, 3, ..., 45, 46, 47 Next

Home » Olympiad Section » Combinatorics » Combinatorics Proposed & Own Problems

Jump to:

Who is Online
	Users browsing this forum: 0 Registered, 0 Hidden and 1 Guest Registered Users: None
	Legend: [ Administrator ][ Moderator ][ User ][ Bot ]

	New posts			Announcement
	No new posts			Sticky
	Popular			Event
	Locked			Moved
	You have posted in this topic

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
You cannot post calendar events in this forum