p sample, july 13

$ \gdef\and{\cap} \gdef\or{\cup} \gdef\bar#1{\overline{#1}} $

See here.

date page question duration ans result thoughts
2025-07-13 Sun 13:39 89 205 6 b
206 5 c
114 270 2 c
247 605 7 b
606 17 b seen before and it still tripped me up
150 367 5 c
368 3 c
369 3 e

A perfect score! Lots of "how many items in the complicated set" today.