Henry Dudeney, "Good Old Fashioned Challenging Puzzles and Perplexing Mathematical Problems"
English | ISBN: 1840245573 | 2007 | 160 pages | PDF | 4 MB
English | ISBN: 1840245573 | 2007 | 160 pages | PDF | 4 MB
Contains mathematical brain teasers, first published in 1917, as the puzzles regularly appeared in newspapers and magazines. This book includes new twists on old puzzles, as well as other puzzles - some reasonably easy and others very hard.