Folj.com: Analytical Puzzles
Brain Food: Analytical and Mathematical Puzzles
 
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The Lady or the Tiger? by Raymond Smullyan |
 
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To Mock a Mockingbird by Raymond Smullyan |
 
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My Best Mathematical and Recreational Puzzles by Martin Gardner |
 
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The Moscow Puzzles: 359 Mathematical Recreations by Boris A. Kordemsky |
 
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Gรถdel, Escher, Bach: An Eternal Golden Braid by Douglas Hofstadter |
