Puzzle Box (Dover Brain Games & Puzzles) - Softcover

Gilbert, Andrea; Cohen, Bram

Softcover

ISBN 10: 0486810046 ISBN 13: 9780486810041

Verlag: Dover Publications Inc., 2016

Inhaltsangabe

Multiplying my age by 6 then subtracting 6 produces the same result as subtracting 7 from my age then multiplying by 7. How old am I?
On my broken calculator with keys + - ÷ x =, the only functional number is 7. How can I get 34 to appear in the readout?
A country mints four denominations of coins, in whole numbers of cents. It takes four of these coins to make 21¢, or 24¢, or 25¢, or 26¢. What are the denominations of the coins?
These and almost 300 other mathematical puzzles appear in this original collection, devised by world-renowned mathematicians, puzzle creators, and devoted puzzle lovers. A unique puzzle project, it unites the efforts of a dozen authors, including software engineer Andrea Gilbert and Bram Cohen, author of the P2P BitTorrent protocol.
Seventeen different types of challenges include 3-D puzzles, chess puzzles, connections, dissections, foldings, geometrical puzzles, logic problems, matchstick puzzles, mazes, moving pieces, number puzzles, put-togethers, strimko, sudoku, visual puzzles, weightings, and word puzzles. The difficulty level of each puzzle is marked by stars, ranging from 2 to 5. Average difficulty level is about 3 stars, promising puzzle enthusiasts many entrancing hours of solving and enjoyment.

Über diesen Titel

Über die Autorin bzw. den Autor

Peter and Serhiy Grabarchuk are part of the Grabarchuk Puzzle Family. Over a period of decades they have produced puzzle books, puzzle apps, interactive puzzles, and more.

Details zur Ausgabe

• Verlag: Dover Publications Inc.
• Erscheinungsdatum: 2016
• Sprache: Englisch
• ISBN 10: 0486810046
• ISBN 13: 9780486810041
• Einband: Taschenbuch
• Anzahl der Seiten: 96
• Herausgeber: Grabarchuk Peter, Grabarchuk Serhiy
• Kontakt zum Hersteller: Nicht verfügbar
• Verantwortliche Person: Soc. Agr. La Raia Ss; http://www.la-raia.it; ; Strada Monterotondo, 79; Novi Ligure; 15067; Italien