Think of a number between 1 and 64.

Look at the following cards.

Which ones are your number on.

Here is a classical Binary Numbers Trick To identify the chosen number There is an explanation There is a non classical Fibonacci Version It is mentioned that it can be done for Prime Numbers ... can you make the cards ...,. | |

- Printable Cards
- Another presentation Some suggestions on what to say to students.
- Using the Fibonacci Numbers to Represent Numbers Java Applet to create Cards for Magic Trick; Java Applet to Convert Between Bases; Converting Miles to Kilometers using Fibonacci; Mentions Zeckendorf Representation
- Generalizing and Extending Instead of Base 2 there are two variations: Base 3; A Negative Base. (Think about : complex base (see below); base 16)

A Different Trick Using Binary Numbers This is similar to the Classical 21-Card Trick. This is video done by some of Ryan Aves's students.

The Complex Number -1+i works as a Base for the Gaussian Integers This can be used to get A Fractal Shape that tiles the plane. - Advanced Papers on Bases
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