Download e-book for kindle: Ancient Puzzles: Classic Brainteasers and Other Timeless by Dominic Olivastro

By Dominic Olivastro

Match wits with the nice minds of the world’s maximum civilizations during this attention-grabbing choice of old conundrums, brainteasers, and mind-benders.
• What do prehistoric bone markings and glossy laptop technology have in common?
• What is the secret of pi that stumped generations of historic mathematicians?
• What are the traditional puzzle origins of renowned video games corresponding to tic-tac-toe and chess?
• Can you clear up the puzzles posed to emperor Charlemagne by way of Alcuin of York?
• What’s the key lore at the back of magic squares that captured the mind's eye of chinese language emperors, Persian mystics, and Benjamin Franklin?
Dominic Olivastro provides a well-liked background of arithmetic via concentrating on the puzzles that civilizations posed for his or her personal schooling and leisure. listed here are vintage “puzzle difficulties” from historical Africa, Egypt, Persia, China, and Greece and from cultures and texts spanning the center a long time and the Renaissance the entire solution to the present.
each one puzzle is associated with insightful people and clinical historical past that is helping make clear the mysterious function and starting place of the matter. interesting clues for knowing solutions draw on sleek problem-solving recommendations and result in historical secrets and techniques that, prior to now, have not often been understood. even if you decipher them for his or her historic importance, classical knowledge, or simply for the sheer, maddening enjoyable of it, those pleasant puzzles supply a distinct, exciting, and enlightening advisor to the evolution of the human brain.

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Extra info for Ancient Puzzles: Classic Brainteasers and Other Timeless Mathematical Games of the Last Ten Centuries

Sample text

That is, instead of doubling each column, can you triple them, or quadruple them? Can you find a general method for finding the correct product? Division was not quite as simple for the Egyptians. For example, consider this problem of the Rhind Papyrus: I go down 3 times; 1/3 of me, 1/5 of me is added to me; return I, filled am I. Who am I? The strange phrasing is quite typical of these problems, by the way. It arises because Ahmes still does not know how to express a puzzle. It seems to be asking for the sum of 3 + 1/3 + 1 /5-a trivial problem by today's standards, but in Figure 17 you can see what the poor scribe went through.

A later chapter on the LiberAbaci will give the solution, but for now I leave it for the reader. Hint: Subtract 350 from the final number. THE MERCHANT'S RULE Che problems in the Rhind Papyrus that are most interesting are those that point to a general method of solution. Problem 24 is an example: "A heap and its 1/7 part become 19. ) The solution runs as follows: Assume 7. Then heap is 7 and 1/7 of the heap is 1 making a total of 8. As many times as 8 must be multiplied to give 19, so many times 7 must be multiplied to give the required number.

In each house, there were 7 cats. Each cat killed 7 mice. Each mouse ate 7 sheaves of wheat. Each sheaf would produce 7 hekats of grain. Grain, wheat, mice, cats, houses: What was the man's entire estate? If this is indeed the missing puzzle, then it occurred again about 30 centuries later, with only minor variations, in Leonardo Fibonacci's Liber Abaci. Fibonacci's version of the puzzle reads: Seven old women are on the road to Rome. Each woman has 7 mules, each mule carries 7 sacks, each sack contains 7 loaves, with each loaf there are 7 knives, and each knife is in 7 sheaths.

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