Test 2 review problems

Test 2 is scheduled for Friday 14 October. The review problems are here. Answers and/or links will be posted soon, but I strongly encourage everyone to go back and review the proof that there is no largest prime number and make sure that you understand the reasoning that is being used in the proof. In particular, make sure that you understand how proof by contradiction works! The relevant links describing the proof are in this post (the readings at the end of the post), and a description of how the division algorithm fits in is in this post.