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New posts in recreational-mathematics
What's special about 323 and squared rectangles?
number-theory
graph-theory
recreational-mathematics
integers
tiling
Difficult coin weighing puzzle: 14 coins, 1 fake (heavier or lighter), 3 pre-determined weighings
recreational-mathematics
puzzle
Is this (deceptive) pattern just a coincidence?
number-theory
elementary-number-theory
recreational-mathematics
pattern-recognition
How many disconnected graphs of the Rubik's cube exist?
combinatorics
graph-theory
recreational-mathematics
rubiks-cube
Polyhedra with identical faces
recreational-mathematics
polyhedra
Magical Numbers
elementary-number-theory
recreational-mathematics
A 3rd grade math problem: fill in blanks with numbers to obtain a valid equation
algorithms
diophantine-equations
recreational-mathematics
puzzle
recursive-algorithms
Rigid pentagons and rational solutions of $s^4+s^3+s^2+s+1=y^2$
geometry
number-theory
diophantine-equations
recreational-mathematics
geometric-construction
Integers less than $7000$ achievable by starting with $x=0$ and applying $x\to\lceil x^2/2\rceil$, $x\to\lfloor x/3\rfloor$, $x\to9x+2$
combinatorics
number-theory
functions
contest-math
recreational-mathematics
The Math behind rotation puzzles?
puzzle
recreational-mathematics
Reflected rays /lines bouncing in a circle? [duplicate]
geometry
recreational-mathematics
What is the parity of permutation in the 15 puzzle?
group-theory
recreational-mathematics
permutations
Winning strategy for a matchstick game
recreational-mathematics
game-theory
combinatorial-game-theory
Math games for car journeys
soft-question
recreational-mathematics
big-list
Improving Von Neumann's Unfair Coin Solution
probability
puzzle
recreational-mathematics
Doubling the cube with unit sticks
geometry
graph-theory
recreational-mathematics
geometric-construction
Finding the formula for the ulam spiral starting with $0$ as a bijective function $U:\mathbb{N}\rightarrow\mathbb{Z×Z}$
algebra-precalculus
recurrence-relations
recreational-mathematics
Deriving the 37-percent rule for dating
probability
combinatorics
recreational-mathematics
What hexahedra have faces with areas of exactly 1, 2, 3, 4, 5, and 6 units?
geometry
recreational-mathematics
polyhedra
solid-geometry
New Year Maths 2015
combinatorics
summation
binomial-coefficients
recreational-mathematics
products
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