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New posts in recreational-mathematics
Integral for the New Year $2019$!
integration
definite-integrals
recreational-mathematics
Quotient geometries known in popular culture, such as "flat torus = Asteroids video game"
general-topology
geometry
recreational-mathematics
education
Which is bigger: $9^{9^{9^{9^{9^{9^{9^{9^{9^{9}}}}}}}}}$ or $9!!!!!!!!!$?
inequality
recreational-mathematics
factorial
big-numbers
power-towers
Is it possible to draw this picture without lifting the pen?
geometry
graph-theory
recreational-mathematics
eulerian-path
How many ways are there to eat a chocolate bar?
combinatorics
recreational-mathematics
Do all natural numbers have a nonzero multiple that is a palindrome in base 10?
number-theory
recreational-mathematics
palindrome
Is $2^{16} = 65536$ the only power of $2$ that has no digit which is a power of $2$ in base-$10$?
number-theory
recreational-mathematics
exponentiation
decimal-expansion
Possible distinct positive real $x,y,z \neq 1$ with $x^{(y^z)} = y^{(z^x)} = z^{(x^y)}$ in cyclic permutation?
inequality
recreational-mathematics
A new interesting pattern to $i\uparrow\uparrow n$ that looks cool (and $z\uparrow\uparrow x$ for $z\in\mathbb C,x\in\mathbb R$)
algebra-precalculus
complex-numbers
recreational-mathematics
tetration
power-towers
How to tell if a Rubik's cube is solvable?
recreational-mathematics
rubiks-cube
Using Overpowered Theorems to Solve Easy Problems
recreational-mathematics
Mathematical literature to lose yourself in
reference-request
soft-question
recreational-mathematics
big-list
Joke explanation: "a comathematician is a device for turning cotheorems into ffee"
category-theory
recreational-mathematics
If the decimal expansion of $a/b$ contains "$7143$" then $b>1250$
elementary-number-theory
contest-math
recreational-mathematics
fractions
Turning coins on a chessboard
recreational-mathematics
Minesweeper - Chance of one-click win
probability
combinatorics
recreational-mathematics
Literary statements that are false as mathematics [closed]
soft-question
recreational-mathematics
big-list
Is there a clever solution to Arnold's "merchant problem"?
algebra-precalculus
recreational-mathematics
Proving a jigsaw is possible
combinatorics
recreational-mathematics
puzzle
What is the optimal number of dice to roll a Yahtzee in one roll?
probability-theory
recreational-mathematics
problem-solving
dice
inclusion-exclusion
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