MathForces: Math Olympiads
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All problems with tag: Combinatorics



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Name сортировать Difficulty сортировать Users
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Probability computer 300 36 Combinatorics
Sum of four 100 417 Combinatorics, Digits
Love Triangle 400 6 Combinatorics
Prime Sets 500 8 Combinatorics, Number-Theory
C Sum 300 118 Algebra, Combinatorics, Formulas
Lin the Racoon's Debut 600 18 Combinatorics, Raccoon
Convex triangle 400 39 Geometry, Combinatorics
Again these rooks 600 58 Combinatorics, Boards
2020 Palindromes 100 377 Combinatorics, Palindromes
Weird games 500 20 Combinatorics
Checkboard 600 3 Combinatorics
Pencils 400 7 Combinatorics
Bingo! 200 157 Combinatorics, Probabilities
Big set 400 15 Combinatorics
School Clubs 500 3 Combinatorics
Friendly rooks 200 163 Combinatorics, Chess
Air MF 500 6 Combinatorics
Money date 100 325 Combinatorics, Probabilities
Ordered papers 300 34 Combinatorics
Switchers 400 44 Combinatorics, Sets
Friendly Team 400 12 Combinatorics
Simple expression 300 83 Algebra, Combinatorics
More dominos 400 31 Combinatorics
Equilateral Triangles 200 213 Combinatorics, Grids
Total inversion 500 31 Combinatorics, Geometry
Zeros and Ones 300 25 Combinatorics
Teleporting button 300 18 Combinatorics, Probabilities
Bools and cows 200 164 Random, Combinatorics
Difference of squares 200 51 Combinatorics, Number-Theory
Unfair Game 400 31 Combinatorics
Regular Polygons 200 53 Geometry, Combinatorics
!Fancy grid 700 9 Combinatorics, Graphs
Subsets Collection 600 27 Combinatorics, Sets
Divisible sets 300 6 Combinatorics
Random numbers 400 17 Algebra, Combinatorics
These Triangles 300 21 Geometry, Combinatorics
0,1,2 polynomial 400 20 Combinatorics, Algebra
Fill the square 400 16 Combinatorics, Algebra
Number Coloring 400 22 Combinatorics
Sum probability 300 82 Combinatorics, Algebra, Probablilities
Revolution 300 22 Combinatorics
Math lesson 400 40 Number-Theory, Combinatorics
MathForces Store 500 32 Combinatorics
Parking 300 188 Combinatorics
Soccer Game 500 11 Combinatorics
Factorial Factor 200 63 Number-Theory, Combinatorics
Reverse Product 400 36 Combinatorics, Number-Theory
Independence 300 10 Combinatorics, Probabilities
Rooks 600 16 Combinatorics
Obtuser 400 19 Combinatorics, Geometry
Pentagon 500 17 Geometry, Combinatorics, Pentagons
Flights 500 9 Combinatorics, Graphs
Half Integers 500 2 Combinatorics, Geometry
Infinite game 500 41 Combinatorics, Games
!Fancy sequence 600 8 Combinatorics, Number-Theory
Friends Playing 600 18 Combinatorics
Lin's Game 400 9 Combinatorics, Games
Novirus 300 81 Combinatorics, Graphs
Monochromatics 400 6 Combinatorics, Graphs
Lin's Octagon 300 45 Combinatorics
Almost fixed 400 13 Combinatorics, Algebra
Lin Jumper 500 15 Combinatorics
Rotating Hexagon 600 3 Geometry, Combinatorics
Quadratic Sets 400 8 Combinatorics, Sets, Algebra
Half of Octahedron 400 123 Combinatorics, Graphs
Circled 700 13 Geometry, Combinatorics
Where is my husband 500 23 Combinatorics, True-False
Magic Ruler 500 7 Geometry, Combinatorics