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Anglais

Solution à rédiger en anglais en un minimum de 30 mots.

A son tour

Nicks fans out in front of Francis a deck of twenty-five cards all of which are different. Nick then asks Francis to pick one without showing its face.

Nick then sets out the first five cards in a line and places the next five on top of the first five until he gets five five-card packs.

Francis is then asked to point at the pack that includes the card he first picked. The next thing Nick does is to collect the five packs, placing the one Francis pointed at in the middle of the full pack. He then deals out the cards as before until he gets the five five-card packs again.

For the second time, Francis is asked to point at the pack that includes the card he had originally picked. Nick is then able to show him which card it was.

Explain the trick.

D'après Nicolas CHUQUET (1445-1500)