Loren C. Larson, *Problem-Solving through Problems*, Problem books in
Mathematics, Springer, 1983.

Some interesting web resources are:

- The official William Lowell Putnam Competition webpage.
- Putnam Competition Archive (problems and solutions of recent years)
- The University of Michigan Undergraduate Mathematics Competition (problems and solutions of previous years)
- cut the knot (nice math website with many puzzles)

- Problem Set 1:pdf, ps, dvi.
- Problem Set 2:pdf, ps, dvi.
- Problem Set 3:pdf, ps, dvi.
- Problem Set 4:pdf, ps.
- Problem Set 5:pdf, ps.
- Problem Set 6:pdf, ps.
- Problem Set 7:pdf, ps.
- Problem Set 8:pdf, ps.
- Problem Set 9:pdf, ps.
- Problem Set 10:pdf, ps.
- Problem Set 11:pdf, ps.
- Problem Set 10:pdf, ps.

Last modified: 11/23/2004.