New posts in recreational-mathematics

Constructing a Möbius strip using a square paper? Is it possible?

How to find a volume of this figure (which is $3080 \text{ cm}^3$) in a few seconds?

Is Scrabble's method of determining turn order fair?

Puzzle of gold coins in the bag

Is the empty set homeomorphic to itself?

Can a collection of points be recovered from its multiset of distances?

Puzzles or short exercises illustrating mathematical problem solving to freshman students

Optimal algorithm for finding the odd sphere with a balance scale

What is the millionth decimal digit of the $ 10^{10^{10^{10}}} $-th prime?

Did I derive a new form of the gamma function?

Quickest general strategy for village meeting

Determine the highest order of an element of a Rubik's Cube group

Proof of recursive formula for "fusible numbers"

Recreational math: If $f(f(x))=e^x$, bound the integral $\int_0^1 f(x)dx$

How can I obtain or sample a random Rubiks Cube shuffle?

a big number that is obviously prime?

Dividing a square into equal-area rectangles

How to find the 3 fastest horses?

Brute force method of solving the cube: How many moves would it take?

Is Mega Millions Positive Expected Value?