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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.
Buchkauf
Dover Brain Games & Puzzles: Puzzle Box, Volume 1, Peter Grabarchuk, Serhiy Grabarchuk, Ed Pegg Jr., Tanya Grabarchuk, Andrea Gilbert, Bram Cohen, Peter Winkler, Brian Caines, David Krum, Alex Gribarchuk
- Sprache
- Erscheinungsdatum
- 2016
- Einband
- (Paperback)
Keiner hat bisher bewertet.
- Titel
- Dover Brain Games & Puzzles: Puzzle Box, Volume 1
- Sprache
- Englisch
- Autor*innen
- Peter Grabarchuk, Serhiy Grabarchuk, Ed Pegg Jr., Tanya Grabarchuk, Andrea Gilbert, Bram Cohen, Peter Winkler, Brian Caines, David Krum, Alex Gribarchuk
- Erscheinungsdatum
- 2016
- Einband
- Paperback
- Seitenzahl
- 96
- ISBN10
- 0486810046
- ISBN13
- 9780486810041
- Reihe
- Schlagwörter
- Sachbücher, Kinderbücher, Spiele, Spiele & Basteln mit Kindern, Puzzles, Quizze
- Beschreibung
- 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.