First, separate all the cards by suit. Line up each suit in this order: Ace, 2, 3, 4, 5, 6, 7, 8, 9, 10, J, Q, K. Next stack the packets on top of each other. Starting with the top card, deal off 21 cards, making sure that when you lay them down t... Read more of The Self-Arranging Deck at Card Trick.caInformational Site Network Informational
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THE CHOCOLATE SQUARES.

(Various Dissection Puzzles)
Here is a slab of chocolate, indented at the dotted lines so that the
twenty squares can be easily separated. Make a copy of the slab in paper
or cardboard and then try to cut it into nine pieces so that they will
form four perfect squares all of exactly the same size.


Answer:

Square A is left entire; the two pieces marked B fit together and make a
second square; the two pieces C make a third square; and the four pieces
marked D will form the fourth square.




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