I was wondering what other people thought of the difficulty level of Jeff Sackmann’s Challenge Sets? At the start of each set he gives an indication of every questions difficulty (broadly categorised - e.g. 560-620, 620-720, 720+). Does anyone have an opinion on how accurate these ratings are? I can’t help but to feel that they may be a bit overestimated, but it would be great if others felt that they were pretty accurate (it would mean I’m improving!).
Interested in your thoughts.
In the study cave!