Puzzle n°51 (**) - As many Somalis on each side Homepage  

You will be submitted to a test, shall you pass it ?

aby and somali cards

Here is the setting : you are being shown a deck of 52 cards, albeit a very special one. All cards in this deck are identical, with the picture of a somali on one side and the picture of an abyssinian on the other.

You are then blindfolded, and the cards are spread in front of you on a table. You are being told that exactly 15 of them are with the somali side above.

You are then asked, still blindfolded, to separate all the cards into two lots, such as the number of somalis appearing on the top side is exactly the same in each lot. Of course, there is no way of determining, by touch alone, on which side each card is laid.

How will you proceed ?

... I'm giving up...

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Last page update: 20.8.2010