Download e-book for kindle: 536 Puzzles and Curious Problems by Henry E. Dudeney, Martin Gardner

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By Henry E. Dudeney, Martin Gardner

For 2 many years, self-taught mathematician Henry E. Dudeney wrote a puzzle web page, "Perplexities," for The Strand Magazine. Martin Gardner, longtime editor of Scientific American's mathematical video games column, hailed Dudeney as "England's maximum maker of puzzles," unsurpassed within the volume and caliber of his innovations. This compilation of Dudeney's long-inaccessible demanding situations attests to the puzzle-maker's present for growing witty and compelling conundrums.
This treasury of interesting puzzles starts off with a range of arithmetical and algebraical difficulties, together with demanding situations related to funds, time, pace, and distance. Geometrical difficulties keep on with, besides combinatorial and topological difficulties that function magic squares and stars, course and community puzzles, and map coloring puzzles. the gathering concludes with a sequence of video game, domino, fit, and unclassified puzzles. ideas for all 536 difficulties are integrated, and captivating drawings liven up the e-book.

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The double journey takes him exactly seven tell the distance from his house to the town? walks from his miles per hour, the rate of three hours. Can you 92. THE MEETING CARS The Crackhams made their first stop at Bugleminster, where they were to spend the night at a friend's house. This friend was to leave home at the same time and ride to London to put up at the Crackhams' house. They took the same route, and each car went at its own uniform speed. They kept a look-out for one another, and met forty miles from Bugleminster.

The two weighings show nothing more than two simultaneous equations, with three unknowns. 101. WEIGHING THE TEA A grocer proposed to put up 20 Ibs. of China tea into 2-lb. packets, but his weights had been misplaced by somebody, and he could only find the 5-lb. and the 9-lb. weights. What is the quickest way for him to do the business? We will say at once that only nine weighings are really necessary. 102. AN EXCEPTIONAL NUMBER A number is formed of five successive digits (not necessarily in regular order) so that the number formed by the first two multiplied by the central digit will produce the number expressed by the last two.

68. PICKLEMINSTER TO QUICKVILLE Two trains, A and B, leave Pickleminster for Quickville at the same time as two trains, C and D, leave Quickville for Pickleminster. A passes C 120 miles from Pickleminster and D 140 miles from Pickleminster. B passes C 126 miles from Quickville and D half way between Pickleminster and Quickville. Now, what is the distance from Pickleminster to Quickville? Every train runs uniformly at an ordinary rate. 69. THE DAMAGED ENGINE We were going by train from Anglechester to Clinkerton, and an hour after starting an accident happened to the engine.

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536 Puzzles and Curious Problems by Henry E. Dudeney, Martin Gardner

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