Home
Guidelines
Organizing
Organizing & Preparing for the Fair
Choosing a Theme
Different Types of Displays
Some Typical Projects
Who to Invite
Optional Timelines
Math Fair Club
Grading
Assessment Checklist (Grade 7)
Evaluation Guidelines (Grade 9)
Rubric for a Math Fair (Grade 12)
Marking Guide (Grades 5 and 6)
Math Fair Club Evaluation (Grades 4 and 5)
Resources & Contacts
Puzzle Sources
Contacts
Workshops and Conferences
Puzzles
Level 1 Puzzles
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Spoke Sum
Number Wheel
Buggy Jump
Pyramid
Nine Men in a Trench
Star Jump
Circle Jump
Circle Jump II
Four Cottages
Free the Animals
Sam's House
About the Solutions
Solutions - Level 1
Level 2 Puzzles
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Neighbourhood Sums
Eight Squares
Soko Puzzle I
Soko Puzzle II
Abdication
Regime Change
Stairways to Heaven
Catacombs
About the Solutions
River Crossing Puzzles
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The fox, the goose, and the grain
The fox, the goose, and the grain, and the dog
The mouse, the elephant, the dog, and the cat
Soldiers and children
Animal Crossing
The Three Thieves
The Missionaries and the Cannibals
Quarrelsome Boys
Jealous husbands
A Handful for the Farmer
The farmer, his children, and their pets
About the Solutions
Sudoku-Type Puzzles
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Cats, Cows, and Pigs
Latin Squares
Apple and Bananas I
Apple and Bananas II
Apple, Bananas, and Cherries
Four Skyscraper Puzzles
Colourful Cats and Pigs I
Colourful Cats and Pigs II
The Wizard's Hats
Four Colours
About the Solutions
Other Puzzles
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Catch the Thief
Cherry Glasses
Coin Jumping I
Coin Jumping II
Evensies
The 22 Game
Switch Positions
Spellbound Frogs
The Die Hard Jugs
About the Solutions
About the Solutions
About SNAP
Our Mandate
Our Supporters
Who Are We?
Curriculum Connections
The SNAP Approach and "Inquiry-Based Learning"
Some History
Gallery
Pyramid
Using 20 styrofoam balls, glue them together to form two 1 by 4 pieces and two 2 by 3 pieces as shown above on the left. The problem is to stack them in such a way that they form a triangular pyramid, that is, a tetrahedron as on the right.
(From one of Brian Bolt's books.)