A logician vacationing in the South Seas finds himself on an island inhabited by two proverbial tribes of liars and truth-tellers. Members of one tribe always tell the truth, members of the other always lie. He comes to a fork in a road and has to ask a native bystander which branch he should take to reach a village.
Math and Logic Puzzles
He has no way of telling whether the native is a truth-teller or a liar. The logician thinks a moment, then asks one question only. From the reply he knows which road to take. What question does he ask? Using only elementary geometry not even trigonometry , prove that angle C equals the sum of angles A and B. With one straight cut you can slice a pie into two pieces. A second cut that crosses the first one will produce four pieces, and a third cut can produce as many as seven pieces. What is the largest number of pieces that you can get with six straight cuts? The props for this problem are a chessboard and 32 dominoes.
Each domino is of such size that it exactly covers two adjacent squares on the board. The 32 dominoes therefore can cover all 64 of the chessboard squares. But now suppose we cut off two squares at diagonally opposite corners of the board and discard one of the dominoes.
Is it possible to place the 31 dominoes on the board so that all the remaining 62 squares are covered? If so, show how it can be done.
If not, prove it impossible. One of these spirals is formed with a single piece of rope that has its ends joined. The other spiral is formed with two separate pieces of rope, each with joined ends. Thanks to thinkfun. Yet he was probably best known — and most loved — for popularising mathematical puzzles. Lessons, puzzles, worksheets, games.
Includes both easy and more difficult ones. Coffee Shop A fun animated game where each day you first buy inventory coffee, cups, milk, and sugar , set the recipe and price, and then watch customers buy and comment on your prices and taste of coffee. The aim is to make the most money, of course. It combines the idea of Sudoku where each digit is used only once in a row or column, and adds the usage of the four basic operations.
This is addictive and fun! Kakuro Kakuro is a numeric crossword puzzle that uses sums. It is considered more challenging than Sudoku, but just as addictive to its fans! Games from Count On. Good graphics. Hints are provided, along with answers, fully worked solutions, and links to related mathematical topics. PomPuzzle Math games and puzzle games to enjoy. Help Ben and Mai to escape a castle where they are held by two bank robbers and reach the local police station in time to stop the robbers. It will take about 20 minutes to complete all four challenges.
Suitable for middle school level. Googol Learning Googols of fun combining math, music and stories into albums. Also free videos, articles, fun contests, and more.
The following puzzles are the Transum Advanced Starters.
The site also has an interactive online version for these puzzles. Downloadable posters portraying classic mistakes students often make, with funny identifying phrases. Gallery of Classic Math Mistakes Downloadable posters portraying classic mistakes students often make, with funny identifying phrases. Play online, print it out or export as PDF.
Also free puzzles to newspapers, magazines, teachers. Curious Math Fun and fascinating math tricks, mental methods and trivia. Online math resources menu.
Cool Math Games - Free Online Math Games, Cool Puzzles, and More
Middle and high school. For all levels. Lots of fun looking games. Cotter This set contains a book explaining over math games and all the necessary cards to play them.
While part of the RightStart Math program, it can be used with any math curriculum. The games provide practice both for learning concepts and math facts. Includes games on numeration, addition, subtraction, multiplication, division, money, clocks, and fractions.