20:32 Thursday 17 December 2015 JST

Good last lesson of the year with GG, featuring only M and Te because Y had to leave for a 忘年会 (end of year party).

Actually M was quite late, but she brought back the Digits in a Box puzzle, which I think I’ve written about before. She wasn’t able to solve it without looking it up online. I plan to give it to Fred not just unsolved, but without the containing box, so he won’t immediately know how small it can be made.