 Browse the
Internet Mathematics Library:
 Classic Problems
from the Dr. Math FAQ
 Age, coin, and other problems, including the missing dollar, the tower of Hanoi, the
two trains, and Monty Hall.
 Eye
Opener Series  Alexander Bogomolny
 A collection of Java applets that illustrate and thus help to solve or prove various
math problems. See also Games & Puzzles.
 High School Problems of the Week  Math Forum
 Nonroutine problems that encourage students to verbalize solutions:
Math Fundamentals, PreAlgebra,
Algebra, Geometry, PreCalculus. See also
Sites with Problems Administered by Others.
 Interactive Problems  Suzanne Alejandre
 Bricks,
Dominoes,
Locker Problem,
Traffic Jam. See also Magic Squares,
Tessellation Tutorials, and many more.
 International
Mathematics Olympiad (IMO)
 The annual mathematics competition for high school students. Problems come from various
areas of mathematics, such as are included in math curricula at secondary schools.
 Mathematics
Lessons  Cynthia Lanius
 A wide variety of problems and puzzles to explore.
 Number and Line Puzzles  Math Forum
 Year 2000, 1999, 1998 puzzles; Four Fours puzzle; connecting the dots.
 Online Reference
to Mathematical Problems  MathPro
 A searchable database of 20,000+ math problems from journals and contests
including the American Mathematical Monthly, Journal of Recreational
Mathematics, Mathematical Questions and Solutions from the Educational Times,
and several national and international mathematical olympiads.
 Puzzle
Archive  Math Forum
 Puzzles and brain teasers archived from the newsgroup rec.puzzles and categorized
by subject. Both the puzzles and their solutions are given.

 BEATCALC
 Mental math tricks from the BEATCALC mailing list. Faster than a speeding calculator 
memorize a few simple rules and amaze your friends!
 Division Tips
 From the Archives of the Math Forum's Internet project Ask Dr. Math.
How to know when a number can be divided by 3,4,5,6,7,8,9,10, or 11.
 Multiplication
Tips
 From the Archives of the Math Forum's Internet project Ask Dr. Math.
Hints for multiplying by 5, 9, and 11.
 Search the
Internet Mathematics Library:
 To see all high school problem and puzzle sites, press the SEARCH button.
Looking for something specific? Type in a keyword,
choose a topic from the lefthand menu, and press the SEARCH button.
