Here is a list of pages that may be useful when preparing for mathematics tests, including standardized tests, college admission tests, mathematics contests and competitions, and just math tests in general.
- Errors on the Mathematics Section of the SAT
- Memorization
- Multiple-Choice Math Test Tips
- Solutions for 2013 SAT Practice Test, section 2
- Solutions for 2013 SAT Practice Test, section 6
- Solutions for 2013 SAT Practice Test, section 9
- Solutions for 2014 SAT Practice Test, section 2
- Solutions for 2014 SAT Practice Test, section 6
- Solutions for 2014 SAT Practice Test, section 8
- Solutions for Practice Test 1, The Official SAT Study Guide, Section 3
- Solutions for Practice Test 1, The Official SAT Study Guide, Section 7
- Solutions for Practice Test 1, The Official SAT Study Guide, Section 8
- Solutions for Practice Test 2, The Official SAT Study Guide, Section 2
- Solutions for Practice Test 2, The Official SAT Study Guide, Section 5
- Solutions for Practice Test 2, The Official SAT Study Guide, Section 8
- Solutions for Practice Test 3, The Official SAT Study Guide, Section 2
- Solutions for Practice Test 3, The Official SAT Study Guide, Section 5
- Solutions for Practice Test 3, The Official SAT Study Guide, Section 8
- Solutions for Practice Test 4, The Official SAT Study Guide, Section 3
- Solutions for Practice Test 4, The Official SAT Study Guide, Section 6
- Solutions for Practice Test 4, The Official SAT Study Guide, Section 9
- Solutions for Practice Test 5, The Official SAT Study Guide, Section 2
- Solutions for Practice Test 5, The Official SAT Study Guide, Section 4
- Solutions for Practice Test 5, The Official SAT Study Guide, Section 8
- Solutions for Practice Test 6, The Official SAT Study Guide, Section 2
- Solutions for Practice Test 6, The Official SAT Study Guide, Section 4
- Solutions for Practice Test 6, The Official SAT Study Guide, Section 8
- Solutions for Practice Test 7, The Official SAT Study Guide, Section 3
- Solutions for Practice Test 7, The Official SAT Study Guide, Section 7
- Solutions for Practice Test 7, The Official SAT Study Guide, Section 9
- Solutions for Practice Test 8, The Official SAT Study Guide, Section 3
- Solutions for Practice Test 8, The Official SAT Study Guide, Section 7
- Solutions for Practice Test 8, The Official SAT Study Guide, Section 9
- Solutions for Practice Test 9, The Official SAT Study Guide, Section 2
- Solutions for Practice Test 9, The Official SAT Study Guide, Section 5
- Solutions for Practice Test 9, The Official SAT Study Guide, Section 8
- Solutions for Practice Test 10, The Official SAT Study Guide, Section 2
- Solutions for Practice Test 10, The Official SAT Study Guide, Section 5
- Solutions for Practice Test 10, The Official SAT Study Guide, Section 8
- Solutions for The Real ACT Prep Guide, 2nd Edition, practice test 1
- Solutions for The Real ACT Prep Guide, 2nd Edition, practice test 2
- Tips for the Mathematics Section of the SAT
- Tips for Writing the AMC (American Mathematics Competitions)
- Tips for Writing the Gauss, Pascal, Cayley, and Fermat Contests
- Tips for Writing the UKMT Challenges
- Why Do Solutions Pages Not Contain Questions?
Depending on the type of test for which you're preparing, you might also find some of the material in the topics section to be useful.