By Henry E. Dudeney
Virtually each kind of mathematical or logical poser is integrated during this impressive assortment — difficulties about the manipulation of numbers; unicursal and path difficulties; relocating counter puzzles; locomotion and velocity difficulties; measuring, weighing, and packing difficulties; clock puzzles; blend and staff difficulties. Greek move puzzles, difficulties related to the dissection or superimposition of airplane figures, issues and contours difficulties, joiner's difficulties, and crossing river difficulties seriously try the geometrical and topological mind's eye. Chessboard difficulties, concerning the dissection of the board or the location or flow of items, age and kinship problems, algebraical and numerical difficulties, magic squares and strips, mazes, puzzle video games, and difficulties relating video games offers you an unparalled chance to workout your logical, in addition to your mathematical agility.
Each challenge is gifted with Dudeney's exact urbane wit and sense of paradox, and every is supplied with a clearly-written answer — and sometimes with an fun and instructive dialogue of ways others attempted to assault it and failed. many of the difficulties are unique creations — yet Dudeney has additionally incorporated many age-old puzzlers for which he has found new, extraordinary, and customarily easier, solutions.
"Not simply an enjoyment yet a revelation … "— THE SPECTATOR.
"The top miscellaneous choice of the type …"— NATURE.
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Extra info for Amusements in mathematics
If you can solve this little puzzle, then try to find three squares in arithmetical progression, with a common difference of 7 and also of 13. −−THE BATTLE OF HASTINGS. All historians know that there is a great deal of mystery and uncertainty concerning the details of the ever−memorable battle on that fatal day, October 14, 1066. My puzzle deals with a curious passage in an ancient monkish chronicle that may never receive the attention that it deserves, and if I am unable to vouch for the authenticity of the document it will none the less serve to furnish us with a problem that can hardly fail to interest those of my readers who have arithmetical predilections.
Robinson spent 6s. more than Mrs. Evans, who spent about a quarter as much as Mrs. Jones. Mrs. Smith spent most of all. Mrs. Brown bought 21 yards more than Bessie−−one of the girls. Annie bought 16 yards more than Mary and spent £3, 0s. 8d. more than Emily. The Christian name of the other girl was Ada. Now, what was her surname? −−SATURDAY MARKETING. Here is an amusing little case of marketing which, although it deals with a good many items of money, leads up to a question of a totally different character.
Potts, and they engaged in some game (he does not say what game) of cards. The professor lost the first game, which resulted in doubling the money that both Mr. and Mrs. Potts had laid on the table. The second game was lost by Mrs. Potts, which doubled the money then held by her husband and the professor. Curiously enough, the third game was lost by Mr. Potts, and had the effect of doubling the money then held by his wife and the professor. It was then found that each person had exactly the same money, but the professor had lost five shillings in the course of play.
Amusements in mathematics by Henry E. Dudeney