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160 pages • missing pub info (editions)
ISBN/UID: 9780486789569
Format: Paperback
Language: English
Publisher: Dover Publications
Publication date: 15 July 2015
Description
There are three loops in a tangle of rope. How many are independent, and how many are interlocked?Two knights stand on a chessboard. How many other knights must you add so that each square is occupied or threatened by a knight?Among six seemingly ...
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160 pages • missing pub info (editions)
ISBN/UID: 9780486789569
Format: Paperback
Language: English
Publisher: Dover Publications
Publication date: 15 July 2015
Description
There are three loops in a tangle of rope. How many are independent, and how many are interlocked?Two knights stand on a chessboard. How many other knights must you add so that each square is occupied or threatened by a knight?Among six seemingly ...