Extra exam problems! If you ¡­

Extra exam problems! If you need more practice (and I am sure you do), try your hand at the following items from the exam problems collection:

28, 36, 41, 56, 97, 99, 106, 113, 121, 130, 132, 138, 139, 141, 142.

(Number 28 is a bit difficult - it is from the good old days of 1985.) You can find solutions of some of these problems here