Links to Cool Math Stuff

Plane Tilings with Infinitely many Orientations – Conway
Conway Checkers in n dimensions
Chebyshev said it and I’ll say it again, there’s always a prime between n and 2n
One of Euler’s original papers where he proves Fermat’s Last Theorem for n = 4 and n = 6
Putnam Archive going back to 1985
The Truncated Tetrahedron is of Rupert Property! (The paper does does a good job explaining what that actually means.)
Beggar My Neighbour Records (Rant on Beggar My Neighbour (by me))