I had these at my university (not Caltech). These take home exams are much, much harder than anything they can give you in a timed in-person exam. It’s not e

I had these at my university (not Caltech). These take home exams are much, much harder than anything they can give you in a timed in-person exam. It’s not even close. This is simply because the set of problems a person can solve in 3hrs limits the scope of the questions that could be asked. In fact, my friends and I would make lists of things we were sure wouldn’t be on the exam due to time constraints. I have to say that nobody cheated. This was partly due to my physics graduating class being 12 students.