A1: Statistical Physics

I highly recommend Prof. Alex Schekochihin's lecture notes on kinetic theory and statistical mechanics. A more advanced treatment of kinetic theory that is a bit of a standard for more involved study can be found in the book by Chapman and Cowling, with other nice resources covered in this reading list.
Recommended problem sheets (courtesy Alex Schekochihin and Steve Blundell).

CP3: Complex Numbers & Ordinary Differential Equations

lecture notes
problem set 1
problem set 2
problem set 3
problem set 4

University College Tutorials

tutorial info sheet