I have no idea if any of you are math nerds, but I had a lot of fun doing this contest last year that's run by a math professor at U of Texas.
You can sign up here:
https://docs.google.com/forms/d/e/1FAIpQLSdpFqn5_cKkerroYoEoM5reAT62s4QXEMl4gPFizK4lII6Cbw/viewform