New posts in Recreational Mathematics

Magical Numbers

Optimal strategy for cutting a sausage?

Functional Equation $f(x+y)-f(x-y)=2f'(x)f'(y)$

Multiples of $999$ have digit sum $\geq 27$

Hat 'trick': Can one of them guess right?

What is the maximum volume that can be contained by a sheet of paper?

World Cup: what group stage result (vector) is most likely?

Which jigsaw pieces fit to make a create a square?

Special properties of the number $146$

How do I calculate how many ways 14 non-attacking bishops can be placed on a chessboard?