What was the most challenging course you've taken at Cal?

<p>I want to try my hand at something difficult next semester probably with P/NP involved. There’s a trend that more difficult courses improve abilities later on in life so I’d like to at least try some of them out. </p>

<p>My most challenging course was Music 20A, since I had not done music for about 10 years, and therefore I sucked at sightsinging.</p>

<p>Not there yet, but from friends MCB102</p>

<p>Some courses, like CS 150, 164, and 184, are known for being high workload.</p>

<p>Other courses, like Math H104, are known for being intellectually challenging.</p>

<p>Which would you prefer? :)</p>