That is, the Derb has landed, in L.A. They are putting me up in yet another
crack house. I had forgotten the key thing about Convention Centers: like
bus stations, they are always located in the seediest part of town. Today’s
math puzzle: the solution is two pounds. It rests on the fact that any square
with an odd number of tens must have a 6 in the units column. I have a
wonderful proof of this, but unfortunately this margin is too small to contain it….