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New posts in recreational-mathematics
Can the golden ratio accurately be expressed in terms of $e$ and $\pi$
soft-question
recreational-mathematics
approximation
diophantine-approximation
golden-ratio
$4494410$ and friends
algebra-precalculus
elementary-number-theory
arithmetic
recreational-mathematics
If $x$, $y$, $x+y$, and $x-y$ are prime numbers, what is their sum?
elementary-number-theory
prime-numbers
recreational-mathematics
What's the largest possible volume of a taco, and how do I make one that big?
differential-geometry
multivariable-calculus
optimization
recreational-mathematics
calculus-of-variations
How do you find the center of a circle with a pencil and a book?
recreational-mathematics
circles
puzzle
Can we remove any prime number with this strange process?
number-theory
prime-numbers
recreational-mathematics
recursive-algorithms
Logic puzzle: Which octopus is telling the truth?
recreational-mathematics
puzzle
Topology: The Board Game
general-topology
algebraic-topology
soft-question
recreational-mathematics
education
What is the smallest number of $45^\circ-60^\circ-75^\circ$ triangles that a square can be divided into?
geometry
puzzle
recreational-mathematics
open-problem
tiling
Methods to compute $\sum_{k=1}^nk^p$ without Faulhaber's formula
summation
recreational-mathematics
alternative-proof
big-list
Probability that a stick randomly broken in five places can form a tetrahedron
probability
geometry
euclidean-geometry
recreational-mathematics
problem-solving
Help find hard integrals that evaluate to $59$? [closed]
integration
definite-integrals
indefinite-integrals
recreational-mathematics
puzzle
Are there four numbers in AP such that their prime factors are also in AP?
sequences-and-series
number-theory
elementary-number-theory
divisibility
recreational-mathematics
How to put 9 pigs into 4 pens so that there are an odd number of pigs in each pen?
arithmetic
recreational-mathematics
The Hole in One Pizza
euclidean-geometry
recreational-mathematics
problem-solving
What happens when we (incorrectly) make improper fractions proper again?
number-theory
elementary-number-theory
recreational-mathematics
fractions
Deleting any digit yields a prime... is there a name for this?
elementary-number-theory
prime-numbers
recreational-mathematics
There are apparently $3072$ ways to draw this flower. But why?
combinatorics
graph-theory
recreational-mathematics
How do people perform mental arithmetic for complicated expressions?
algebra-precalculus
recreational-mathematics
mental-arithmetic
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