<p>
They’re all take-home exams (effectively). So you can take them whenever you want, and if you really wanted to leave on Wednesday, you could do that without much trouble.</p>
<p>On the other hand, if you are like most Caltech students, you might learn the material you never bother to learn during the term for the first few days of finals week, and take the exam at the last minute. Also, some exams are not timed, so you may want to have more time to take it.</p>