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By Henry Ernest, Dudeney

For 2 a long time, 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 fascinating puzzles starts with a range of arithmetical and algebraical difficulties, together with demanding situations related to funds, time, pace, and distance. Geometrical difficulties stick with, in addition to combinatorial and topological difficulties that characteristic magic squares and stars, path and community puzzles, and map coloring puzzles. the gathering concludes with a chain of online game, domino, fit, and unclassified puzzles. ideas for all 536 difficulties are integrated, and fascinating drawings brighten up the e-book.

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Take this as Cryptarithm Puzzles 49 an example. " WRONG WRONG RIGHT "If you substitute correct figures the little addition sum will work correctly. " 157. LETTER MULTIPLICATION In this little multiplication sum the five letters represent five different digits. What are the actual figures? There is no O. SEAM T MEATS 158. THE CONSPIRATORS' CODE A correspondent (G. ) sends this interesting puzzle. Two conspirators had a secret code. Their letters sometimes contained little arithmetical sums relating to some quite plausible discussion, and having an entirely innocent appearance.

Pat assured me that she would keep going at one pace until she got to her journey's end. She wouldn't slow down and she wouldn't put on any spurts. " 'We have been on the road twenty minutes,' I remarked, looking at my watch. ' " 'Just half as far as it is from here to Pigtown,' said Pat. "After a rapid refreshment at Pig town we went on another five miles, and then I asked Pat how far it was to Ballyfoyne. I got exactly the same reply. It was clear he could only think in terms of Pigtown. " What is the distance from Boghooley to Ballyfoyne?

44 Arithmetic & Algebraic Problems 145. A COMPLETE SKELETON This is an arrangement without any figure at all, constructed by Mr. A. Corrigan. Note the decimal dot in the quotient. The extension to four places of decimals makes it curiously easy to solve. ***)******(****-**** *** *** *** *** *** *** *** **** **** 146. SIMPLE MULTIPLICATION George Crackham produced this puzzle at the breakfast table one morning: ********** 2 ********** He asked them to substitute for the stars all the ten digits in each row, so arranged as to form a correct little sum in multiplication.

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536 Puzzles and Curious Problems by Henry Ernest, Dudeney

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