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  Logic
 
Card Identification
 
Q Here are the backs of three cards from an ordinary deck of cards.

A B C

You have to identify each card as a queen or king and as a heart or spade based on the following four pieces of information.

  1. There's at least one queen to the right of a king.
  2. There's at least one queen to the left of a queen.
  3. There's at least one heart to the left of a spade.
  4. There's at least one heart to the right of a heart.

 
A Card A = king of hearts
Card B = queen of hearts
Card C = queen of spades

Based on a puzzle in More Puzzles for Pleasure and Leisure by Thomas L. Hirsch. New York: Abelard-Schuman, 1974.