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7 Coins Puzzle
Sam Loyd's Puzzles
Can you better Sam Loyd?
Farmer and Wife To Catch Rooster and Hen
Sam Loyd's fifteen
Sam Loyd's Geometric Puzzle
Plato's Geometric Numbers: can you better Sam Loyd?
Puzzlist vs. Mathematician: A Practical Arithmetic Problem
The Gordian Knot
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Copyright © 1996-2008
Alexander Bogomolny
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