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Fibonacci's Three Wishes 1

First or two articles about Fibonacci, written for students.

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Arrow Arithmetic 1

The first part of an investigation into how to represent numbers using geometric transformations that ultimately leads us to discover numbers not on the number line.

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Arrow Arithmetic 2

Introduces the idea of a twizzle to represent number and asks how one can use this representation to add and subtract geometrically.

Balance Power

Age 11 to 18 Challenge Level:

Try weights from 1 to 15 units. Can you spot a pattern? Can you explain it? Now continue the pattern.

You might find the following spreadsheet tool useful for the last part of the problem.