Jack had five cards in a pile on a table. He gave me the top card, and then placed the next card at the bottom of the pile; then he gave me the next on the top and placed the next one after that at the bottom of his pile. He continued like this until he had given me all of the cards. I looked down and to my surprised found that Jack had given me the cards in order: Ace, 2, 3, 4, 5.
In what order (top to bottom) did Jack originally have the cards in the pile on the table?
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Ace,2,3,4,5
Ace,4,2,5,3
Ace,5,2,3,4
Ace,5,2,4,3
Ace,5,3,4,2
Select an option, then submit.
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Intermediate Mathematical Challenge 2002 (2002)
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