Are there restrictions on the size of the sticky note?
3" by 3" is a pretty standard size, so that seems like a reasonable size. ;-)
Are we allowed to bring a calculator as an auxiliary tool in both exams?
Nope, no calculators will be permitted for either the midterm or final exam. Only that 3" by 3" sticky note.
I don't use sticky notes. Can I just cut a piece of paper to that size instead?
That works (or you can ask us for one.. I have plenty!)