Binary number cards
Tue, 2010-03-30 18:26 — walker
Donor: Emily Moore
These cards use holes and slots to represent the numbers 1 to 15. In the binary representation, a 0 is represented by a hole in the card; a 1 by a slot from the hole-position to the edge of the card. Inserting pins into the holes, corresponding to a binary representation, one can retrieve the card with a desired number.
These cards were used for class demonstration by Professor Emily Moore, based on a reference by Martin Gardner.
