New posts in recreational-mathematics

What causes this fractal to curl and unwind?

Extracting individual race results from Mario Kart final scores

Infinite staircase to a circle

Interesting patterns in $f(k,n)=k\pi-\sum\limits_{x=1}^n\tan^{-1}\left(\frac1{\sqrt[k]x}\right)$

Is it possible to get a 4 digit pin from this? [closed]

How many different shapes can I make with this toy?

Why do siamese magic squares have real eigenvalues, symmetric around zero?

Is there a collection of alternative mathematical notation? (Semi-soft Question)

What is the relationship between 1/7, 1/11, 1/13, and the number 1001?

Evaluation of the integral $\int_0^1 \log{\Gamma(x+1)}\mathrm dx$

Properties of the number 50

Coffee Break Riddle [closed]

Can you complete the expression $2 \underline{ }\, \underline{ }\, \underline{ } \,\underline{ } 5 = 2015$?

Does there exist a general solution of this 'Counting numbers' game?

Graceful graphs with Valence $k$

A problem for the New Year [closed]

What's the minimum number of $2$s needed to write a positive integer?

Is this a way to prove there are infinitely many primes?

Why are these geometric problems so hard?

Rainbow Hats Puzzle