MathForces: Math Olympiads
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Name сортировать Difficulty сортировать Users
Solved сортировать
Tags сортировать
Cubical squares 100 429 Algebra, Exponents
Half of Octahedron 400 112 Combinatorics, Graphs
Not your business 200 156 Geometry, Tangents
Tommorow's day 100 512 Algebra, Digits
Temirlan's cake 100 578 Algebra, Arithmetics
New FE 300 35 Functional-Equations
Test 100 527
Oh-matrix 300 105 Algebra, Linear-Algebra, Matrices
2020 digit 200 354 Algebra, Digits
Numbers ratio 100 475 Algebra, Arithmetics
Triangle in Hexagon 200 27 Geometry, Probabilities
Just sequence 300 120 Algebra, Sequences
Viet said 500 73 Number-Theory
Point O 400 88 Geometry
NRD pair 200 76 Number-Theory, Prime-Numbers
Product of differences 300 69 Algebra, Inequalities
Special square 500 38 Number-Theory, Squares
Sum of four 100 268 Combinatorics, Digits
Triangle in hyperbola 400 48 Algebra, Geometry, Coordinates
Fractions 300 28 Algebra
Positive product of sums 300 50 Algebra, Equations, Number-Theory
C Sum 300 78 Algebra, Combinatorics, Formulas
Random answer 100 357 Random
Odd divisors 300 66 Number-Theory, Divisors
Convex triangle 400 30 Geometry, Combinatorics
Powers of 6 500 33 Number-theory, Equations
2020 Palindromes 100 256 Combinatorics, Palindromes
Divisibility by 4 200 152 Number-Theory, Digits
Infinite game 500 37 Combinatorics, Games
Relatively prime with 2020 200 172 Number-Theory, Prime-Numbers
Squared fours 200 132 Number-Theory, Algebra
Tricky sequence 500 26 Number-Theory, Algebra, Sequences
Polynomial without 4 400 36 Algebra, Polynomials
2+1 200 196 Algebra, Arithmetics
Prime Sets 500 3 Combinatorics, Number-Theory
5th power equation 500 58 Algebra, Equations
Friendly rooks 200 113 Combinatorics, Chess
Similar polynomials 500 42 Algebra, Polynomials
Sum of digits 2020 200 114 Number-Theory, Digits
All such 400 46 Number-Theory, Equations
335577 500 26 Number-Theory, Powers
Functional Eq 700 12 Algebra, Functional-Equations
Tricky polynomial 600 36 Algebra, Polynomials, Complex-Numbers
Area of triangle 200 150 Geometry, Squares, Areas
Cuboid 300 20 Number-Theory
x[x] 400 39 Number-Theory, Floor-Function
First geometry 400 48 Geometry, Circles, Tangents
Expanding brackets 300 123 Algebra, Polynomials
VNT 500 92 Number-Theory, LTE
Many digits 400 82 Algebra
Minimizing Fibb 400 98 Algebra, Sequences
One three-digit number 200 209 Algebra, Inequalities
Fancy meal 300 66
Lin the Racoon's Debut 600 12 Combinatorics, Raccoon
Progressive sequence 500 16 Algebra, Number-Theory, Sequences
Function 300 167 Algebra, Functional-Equations
Angle chasing 300 114 Geometry, Angle-Chasing
Solutions on the interval 300 49 Algebra, Equations
Again these rooks 600 50 Combinatorics, Boards
Tricky 400 56 Number-Theory
Rational Irrational 300 17 Algebra, Number-Theory
What a function 400 32 Algebra, Functions
Circled 700 9 Geometry, Combinatorics
Simple expression 300 68 Algebra, Combinatorics
Permutational Polynomial 500 28 Algebra
Lin Jumper 500 9 Combinatorics
Almost squared numbers 300 36 Number-Theory
Odd factors 500 24
Tan-Sin 500 35 Geometry, Trigonometry
Bingo! 200 101 Combinatorics, Probabilities
Money date 100 242 Combinatorics, Probabilities
5 instead of 1 200 154
Sum probability 300 62 Combinatorics, Algebra, Probablilities
Prime powers 400 33
Exactly two roots 400 37 Number-Theory, Equations
Sqaure in square 600 31 Geometry, Squares
Square multiples of 24 200 190
Pentagon 500 14 Geometry, Combinatorics, Pentagons
Cool-divisble numbers 300 55 Number-Theory, Digits
Zero sequence 200 53 Algebra, Sequences
Orthocenter 600 11 Geometry, Circles, Tangents
Nice polynomial 700 5 Algebra
MathForces Store 500 15 Combinatorics
Arithmetic derivative 500 35 Number-Theory, Functions
6 Apart 500 79 Geometry, 3D
Novirus 300 72 Combinatorics, Graphs
Too much 600 21 Algebra, Equations
U turn 200 128 Algebra, Number-Theory, Digits
MTMTK System 400 15 Algebra, Equations
Friendly Team 400 7 Combinatorics
Sequenta 300 52 Algebra, Sequences
Unfair Game 400 23 Combinatorics
Switchers 400 38 Combinatorics, Sets
Math lesson 400 35 Number-Theory, Combinatorics
!Fancy grid 700 7 Combinatorics, Graphs
Equilateral Triangles 200 181 Combinatorics, Grids
Simple sum 300 20 Algebra, Sums
Gineq 300 34 Geometry
Rotating Hexagon 600 1 Geometry, Combinatorics
More dominos 400 24 Combinatorics
Also palindrome 400 36 Digits
Small triangular numbers 200 106 Algebra, Number-Theory
Sharp inequality 500 7 Algebra, Inequalities
!Fancy polygon 400 36 Geometry, 3D
Bools and cows 200 128 Random, Combinatorics
Powered Numbers (Duplicate) 300 44 Algebra, Number-Theory
Interesting functions 600 9 Number-Theory
Rational Polynomial 400 19 Algebra, Polynomials
Digital Cubes 100 34 Algebra, Digits
Obtuser 400 15 Combinatorics, Geometry
Lucky numbers 100 78 Digits, Algebra
ADAD (Duplicate) 400 35 Geometry, Circles
Equiangular Hexagon 400 8
Lin's Game 400 5 Combinatorics, Games
!Fancy cubic 300 58 Algebra, Number-Theory
Weird equation 200 165 Algebra, Polynomials
Flip 200 45 Algebra, Number-Theory, Digits
Odd polynomial 400 95 Algebra, Polynomials
Subsets Collection 600 21 Combinatorics, Sets
ADAD 400 33 Geometry, Circles
!Fancy FE 500 7 Algebra, Polynomials
6-sums 100 50 Algebra
Sum of Digits 200 36 Number-Theory, Digits
Four on a circle 400 40 Geometry, Circles
Powered Numbers 300 44 Algebra, Number-Theory
Maximum of Minimum 500 20 Algebra, Inequalities
Base4 300 20 Number-Theory
Lin's Octagon 300 31 Combinatorics
Polynomial Probability 600 20
Daniyar's Friends 300 20
0,1,2 polynomial 400 13 Combinatorics, Algebra
Concetric 200 34 Geometry
Just Easy Sum 100 54 Algebra
Fancy polynomial 800 17 Algebra, Polynomials
!Fancy sequence 600 6 Combinatorics, Number-Theory
Discriminant 400 22 Algebra, Polynomials
Sequence 300 33 Number-Theory
Almost fixed 400 7 Combinatorics, Algebra
Not fibbo 300 36 Algebra, Sequences
Binary Sum 500 18 Number-Theory, Algebra
Number Coloring 400 17 Combinatorics
Parking 300 165 Combinatorics
Big set 400 12 Combinatorics
Fancy integral 700 29 Algebra, sums, integrals
Total inversion 500 28 Combinatorics, Geometry
Factorial Factor 200 34 Number-Theory, Combinatorics
Where is my husband 500 22 Combinatorics, True-False
Checkboard 600 1 Combinatorics
Cyclic Q 600 8 Geometry
Reverse Product 400 26 Combinatorics, Number-Theory
Fancy limit 400 30 Algebra, Sequences
Administrative function 900 7
Weird games 500 18 Combinatorics
Rooks 600 8 Combinatorics
Fill the square 400 13 Combinatorics, Algebra
Fancy point 500 11 Geometry
Small triangle 600 11 Geometry, Areas
Five Primes 100 37 Number-Theory
Diameter 400 44 Geometry, Perpendiculars
Sharingan 500 7 Geometry
Regular Polygons 200 34 Geometry, Combinatorics
Lin does shopping 200 11 Algebra, Number-Theory
D Flags 200 63 Web-Search