MERLOT Materials

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This is the May 2001 version of Alexander Bogomolny's "Cut The Knot!" column. It discusses the game of Nim and variants.... see more

Wythoff?s Nim is a sub-page of Alexander Bogomolny?s Cut The Knot! site reviewed elsewhere in MERLOT; in particular, it... see more

The Sliding Piece Puzzle is quite popular, the rules are simple but it requires deep thought. The object is to move the... see more

In solving this puzzle, you permute rows, columns, and quadrants in a 4x4 array of 2-color tiles to make a variety of... see more

Presents a calculator with only a few numbers and functions that work, and asks the user to generate the numbers 1-15... see more

Balance. To balance a wide range of objects: From electrons to galaxies. Didactical tool. To teach about fractions, and... see more

Another sliding 8-tile puzzle. No pictures/loads fast.

A bicolor variant of the classic Towers of Hanoi game from Alexander Bogomolny's Cut The Knot site.

The object of this puzzle game (featuring ray-traced graphics) is to remove all balls from the board. It's harder than it... see more

This virtual manipulative from the National Library of Virtual Manipulatives emulates the traditional abacus.