Note: This course has now become a regularly offered course, Math 490.
The format of the course link .
A couple of problems and some hints .
Putnam challenge link for starters.
Another link here. .
The William Lowell Putnam mathematical contest.
What is the William Lowell Putnam contest? A national-level mathematics contest for undergraduates. First Saturday in December. Sign-up in September. No fee to enter. My Putnam page link.
Link for 12thman here.
Some stuff to think about