Second scientific American book of mathematical puzzles and diversions Second Scientific American Book of mathematical puzzles and diversions Second Scientific American Book of Mathematical Puzzles and Diversions The Second Scientific American Book of Mathematical Puzzles and Diversions 并列题名:Second Scientific American Book of Mathematical Puzzles and Diversions 并列题名:The Second Scientific American Book of Mathematical Puzzles and Diversions First scientific American book of mathematical puzzles and games Magic squares & origami mathematical puzzles & diversions 并列题名:Magic squares & origami mathematical puzzles & diversions