Teaching the ternary base using a card trick

SAHA, SUHAS (2017) Teaching the ternary base using a card trick. At Right Angles, 6 (2). pp. 22-29.

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Abstract

Magic has the ability to grab the attention of adults and children alike, whether it is a traditional trick of pulling rabbits out of a hat or a more sophisticated mind-reading card trick. We started a project at our school to excite children about mathematics using card tricks. We were pleasantly surprised to see such a positive response from children across grades. In the following article, we describe how we used the 27-card trick to introduce ternary bases to students in Grade 9. Pile 1 Pile 2 Pile 3 Figure 1 The Magic Trick Grab a deck of cards, remove the jokers and shuffle the deck. Select any 27 cards from the deck. Fan them out in front of your class and ask a volunteer to choose one card at random, show it to the rest of the class (turn your back or close your eyes so that it is clear you have not seen the selected card) and put the card back into the deck. This card will henceforth be called the secret card. Invite the volunteer to shuffle the deck as many times to the satisfaction of the spectators that the secret card is lost in the deck. While taking the deck back from the volunteer you proclaim that in three steps you will reveal the secret card.

Item Type: Articles in APF Magazines
Uncontrolled Keywords: 27-card trick, ternary base, magic, ceiling function
Subjects: Natural Sciences
Natural Sciences > Mathematics
Divisions: Azim Premji University > University publications > At Right Angles
Depositing User: Mr. Sachin Tirlapur
Date Deposited: 14 Sep 2018 15:25
Last Modified: 14 Sep 2018 15:25
URI: http://publications.azimpremjifoundation.org/id/eprint/1298
Publisher URL: http://apfstatic.s3.ap-south-1.amazonaws.com/s3fs-...

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