This Angle Geometry Quiz tests your knowledge of a few facts relating to angles. Race against the clock as you prove your skills! Topics covered include the interior angles of triangles and quadrilaterals, angles near parallel lines, lines meeting at a point and others.

 

This is one of two math tricks on this site that let you guess someone's birthday after a sequence of mathematical operations.

 

Another game where a calculator might help and not hinder is the Make Numbers Arithmetic Game, where the child must generate as many numbers as possible using only the four given digits, and the basic operations of addition, subtraction, division and multiplication.

 

Feel like something different? A break from the normal pen-and-paper routine? Try Mathteroids, the math asteroid game or the other interactive games on this site.

 

To win this big numbers contest, your kids just need to think of the biggest number they possibly can - bigger than anyone else's! This contest closed on October 20, 2008, but the page shows you how you can organize a min-contest within a class or a school.

 

In This Challenging Math Puzzle you have to place the numbers one through eight in a grid, such that no two neighboring squares have consecutive numbers. It's possible to solve, but it can be quite tough. I've seen 4th graders baffle away for weeks at this puzzle, but its 5th grade and 6th grade kids who seem to have a more realistic chance to solve it. Enjoy!

 

This Checkerboard (or Chessboard) Jigsaw Puzzle will be a great challenge for your primary school kids. Watch them try and try to arrange the pieces until they succeed!

 

In a Cryptarithm puzzle, each digit of an arithmetic sum has been replaced with a letter of the alphabet. The aim of the puzzle is to restore the original sum. These puzzles are sometimes called alphametics or crypt-arithmetics. You can get many more such puzzles from the resources available at www.cryptarithmania.com.

 

The Dot Joining Game is not a join-the-dots puzzle, but a two-player paper-and-pencil game. I've described the game, and also described how you can help your fourth, fifth and sixth graders to unlock the hidden mathematical patterns behind the game.

 

The Easter Date Worksheets allow a child to compute the date of Easter Sunday in any year at all, with no math more complex than long division. Alternatively, try younger kids on the simpler versions of the worksheets - fewer calculations, smaller numbers, but they only work in certain centuries.

 

This free "fours" contestclosed on the 20th of October, 2009. The idea was to make as many numbers as possible using the digit '4' (as many times as you like) and the operations plus, minus, divide and times. Soon I'll upload the contest results, and ideas for how you can run a contest like this one in your own classroom.

 

Fizz Buzz is a well-known game. It gives practice identifying multiples of 5 and 7. It's a great math game for kids, and a hilarious ice-breaker for adults too! At the web page you'll find a "fizz-buzziness calculator" that will determine what a player should say for any given number.

 

This Fraction Simplifying Puzzle challenges kids to simplify a collection of fractions and observe which ones can and can not be simplified. There are variants of the puzzle that make it suitable for kids just learning fractions, all the way up to lower high school.

 

In the Magical Calculator Birthday Math Trick and the "Threes" Math Trick, a kid can appear as a math whiz to his or her friends, by discerning their birthday from the result of a sequence of mathematical operations.

 

Mastermind is a classic game of logical deduction. The first player selects a secret code. The second player tries to guess that code. After each guess, the first player gives clues about how well the second player did - how many digits (or pegs or marbles) in the code are correct, and how many are the right color but the wrong place. In this online version of mastermind, you can pit your wits against the task of finding the computer's secret code, or select your own secret code, and challenge the computer to guess it.

 

In the Math Architect Online Game the goal is to design an apartment with the given area. The catch? Each room is a square, and you must have as few rooms as possible! This makes the game challenging enough to keep kids occupied, and deep enough to keep them learning as they play. There is also a high scores table showing the best players each month, year and for all time.

 

Traveling with kids aged 10 to 99? Take along this Math Card Game and keep them up to speed on their arithmetic! Good for grade 4 and up.

 

And don't miss my Bubble Breaker Game, Math Frozen Bubble, which needs quick-thinking arithmetic to win!

 

Or play a game of Math Hangman? "Three strikes and you're out" is the rule as kids try to guess the hidden math word or sum! Good for almost any grade level!

 

In the Pizza Cutting Puzzle kids try to cut up a square pizza to make it fit in a round tray. Try to cut as few pieces as possible!

 

Want to play sudoku online? You can at this page. The page also has links to some printable sudoku for kids, and a sudoku solver. If you're a sudoku fan, make sure you visit this page and try out the puzzles it provides. Puzzles can be symmetric, and there are five difficulty levels.

 

This Power Puzzle is an exercise to get kids exploring numbers with their calculator, and observe patterns in the numbers they explore.

 

This Weekly Puzzle Google Gadget will show you a new math puzzle every week. If you don't want to visit the web page each week, you can put the gadget on your own web page, or on your personalized google start page.

 

There is a famous story about the inventor of chess, who was offered a reward by the emperor of India. He chose a reward that seemed to the emperor very cheap - just a few sacks of rice - but in reality came to more rice than India could produce in a million years. This site has worksheets to help kids work through a Modern Rice-And-Chessboard Story and see for themselves how rich the reward was.

 

Sliding Block Puzzles are a very broad group of puzzles. This pages explores some simple ones, with questions about what makes a certain puzzle solvable. There's also a java applet allowing people to play with the puzzles mentione don the page.

 

This Spirograph Applet is sure to be a hit with the artistically inclined. You can use it to make pretty patterns, and if you choose to "trust" the applet, you can even save them to disk or print them out. I've also made a page explaining the math that kids will pick up while using it.

 

Squink is a Brain Puzzle where players have to find the squares in a pattern on a grid, and count how many squares surround each location. There are two ways to play - you can count the squares in the pattern shown, or you can find a pattern to produce the counts shown. You can also design patterns of squares and share them with your friends!

 

Why not try the Traffic Jam Game (or the Online Version)? It's a collection of logic puzzles, ranging from simple to challenging. The brightly-colored playing pieces and simple rules will capture your kid's hearts.