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Digital Magic: An Introduction to Base Systems

These are working notes for talk at David and Mary Thompson to be delivered Wednesday June 3rd 2026.

The worksheet for this talk is available:

The Secret Method #

This section is intended for the magicians only.

How do you determine the participant’s number? Start a running total. If the participants says “Yes” to a card then add the first number on that card to your total. Here is a worked example with the relevant parts of the cards highlighted.

Suppose that the particant selected the secret number 9.

The participant will answer “Yes” to cards $A=1$ and $D=8$.

Your running total will be: $1 + 8 = 9$.


Published: May 22, 2026 @ 16:12.
Last Modified: May 22, 2026 @ 16:58.

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