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New posts in recreational-mathematics
The $n$ Immortals problem.
combinatorics
graph-theory
puzzle
recreational-mathematics
Class of integrals: $I(a)=\int_0^\infty \frac{dx}{e^x+ax}$
integration
definite-integrals
improper-integrals
recreational-mathematics
functional-equations
Question about a program generating palindromic prime numbers
prime-numbers
recreational-mathematics
palindrome
What are the symmetries of a colored rubiks cube?
group-theory
finite-groups
recreational-mathematics
geometric-group-theory
Calculate moment of inertia of Koch snowflake
physics
recreational-mathematics
fractals
fractal-analysis
Evaluation of a continued fraction
recreational-mathematics
continued-fractions
Intuitive/heuristic explanation of Polya's urn
probability
recreational-mathematics
polya-urn-model
Non-trivial "I know what number you're thinking of"
soft-question
recreational-mathematics
puzzle
Is there a real-valued function $f$ such that $f(f(x)) = -x$? [duplicate]
recreational-mathematics
functional-equations
Something interesting that I found about some numbers - and would like to see if it's known
number-theory
recreational-mathematics
New Year Maths $2019$
combinatorics
summation
binomial-coefficients
recreational-mathematics
9 pirates have to divide 1000 coins...
logic
discrete-mathematics
induction
recreational-mathematics
puzzle
A riddle for 2015
algebra-precalculus
recreational-mathematics
Finding an invisible circle by drawing another line
geometry
recreational-mathematics
euclidean-geometry
circles
metric-geometry
Which is greater, $20 \uparrow\uparrow\uparrow\uparrow 20$ or $4 \uparrow\uparrow\uparrow\uparrow\uparrow 4$?
number-theory
recreational-mathematics
New Year Maths 2018: $\color{green}{\binom ab+\binom bc+\binom cd}+\color{orange}{\binom de+\binom ef+\binom fg+\binom gh}=\color{red}{2018}$
summation
binomial-coefficients
recreational-mathematics
Mathematical Intuition Behind Schizophrenic Numbers?
soft-question
recreational-mathematics
Upside-down equation: algebra puzzle
algebra-precalculus
recreational-mathematics
puzzle
Dudeney's "Puzzles and Curious Problems": 55 : Eliza's Surname
elementary-number-theory
recreational-mathematics
Is there a prime every year if YYYYMMDD is treated as a base-$10$ number?
number-theory
elementary-number-theory
prime-numbers
divisibility
recreational-mathematics
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