New posts in recreational-mathematics

Fewest required values in magic square?

Maximally touching toruses

Probability of winning a prize in a raffle

Does every number base have at least one "Baseless number"?

Puzzle of renting rooms?

Six of a kind .

How many numbers $\le x$ can be factorized into three numbers which form the sides of a triangle?

Algebraic structures associated to flexagons?

Determining the number of ways a number can be written as sum of three squares

Coloring 5 Largest Numbers in Each Row and Column Yields at Least 25 Double-Colored Numbers

Guessing a number between $1$ and $100$ with 10 distinct questions and 9 honest answers

The Hardest Sudoku Puzzle

A curious case of $1729$

Greatest perimeter polygon on a geoboard

Expected number of calls for bingo win

Identities like $4+5+6=7+8$ and $10^2+11^2+12^2=13^2+14^2$ and so on...

Conway's Game of Life

An equation of the form A + B + C = ABC [duplicate]

Arc sums for a circle of $k$ positive integers whose total sum is $n$

Volume of 1/2 using hull of finite point set with diameter 1