They difficulty ratings are extremely subjective. Some of the yellows and reds enrichment/contests. Some of the reds are straightforward but tedious trial and error. Then there is a yellow that requires physical and mathematical intuition about bicycle wheels.
Is this really how to get a quant job? A clever high schooler could solve these with hints. I can solve most, but I'm terrible at advanced calculus and statistics.
Is this really how to get a quant job? A clever high schooler could solve these with hints. I can solve most, but I'm terrible at advanced calculus and statistics.