Welcome to 4x4x4 FMC round 2!
Time: May 15 to June 30 2015
April 15 to May 15: Prep time. I thought people might want to tune their solvers using a scramble that will actually count. (see scramble 1 below)
Notation for solutions: SiGN
Please use only the subset of moves that turn a...
So there hasn't been a math problem for a while so I'll post one of my own. I made it up myself so hopefully nobody has seen it before. :)
1/2 + 1/3 + 1/4 + 1/5 + 1/6 + ...
is known to diverge. Find the minimum value of Z so that
1/2 + 1/3 + 1/4 + 1/5 + 1/6 +...