Number and Algebra
Pigs Goats and Sheep
Square Milk Bottle Crates
Rectangular Milk Bottle Crates
Pizza Toppings 2
A Ladies Age
Diophantus I
Diophantus II
What is s?
What is t?
What are s and t?
Peter’s Third String
Karen's Second Tiles
Polygonal Strings
The Old Chicken Run Problem
Triangular Number Links
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Number and Algebra
Adding Ten Tiles II
All the Ones
How Many Numbers
Nine Tiles
Ten Tiles II
Ten Tiles III
Weighing Time
Difference Magic Squares
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Geometry
Hineas Other Watch
Hinea's Watch's Hands
Julie's Wheels
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