Henry E. Dudeney, Martin Gardner's 536 puzzles & curious problems PDF

By Henry E. Dudeney, Martin Gardner

Генри Эрнест Дьюдени (10 апреля 1857 - 23 апреля 1930) был английский писатель и математик, который специализировался на логических головоломках и математических играх.
Трудно в наше время найти хоть одну книгу по занимательной математике, в которой (часто без указания авторства) не нашлось бы нескольких блестящих математических задач, рожденных его неисчерпаемой фантазией.

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It then travels down the oviduct, being wrapped in yolk, then albumen, then membranes, before it is finally encased in the shell and laid. Occasionally an egg travels back up the oviduct, meets another egg traveling down it, and then becomes encased inside the second egg during the shell-adding process, thus creating an egg within an egg. Nobody knows for sure what causes the first egg to turn back, although one theory is that a sudden shock could be responsible. Eggs within eggs have been reported in hens, guinea fowl, ducks, and even Coturnix quail.

Julia Aked You can have similar fun at breakfast time by taking a cold bottle of milk—the kind with a foil cap delivered to the door—from the fridge, pouring a little onto your cereal, and replacing the cap securely. A little while later, when the air in the bottle expands as it warms up, the foil top will shoot into the air with a quite impressive pop. Presumably this phenomenon also explains why, having taken my baby’s milk from the fridge and warmed it, when I come to test the temperature by inverting the bottle over my wrist, the milk shoots all over the kitchen unless I first unscrew and rescrew the lid to release the pressure.

These are thriving on the nutritional soup left behind in the cartons. Long-life drinks are usually pasteurized during processing by heating them sufficiently to kill most spoilage organisms. As soon as you open the container, however, bacteria, yeasts, and microbial spores will contaminate your product. If you keep the carton in the fridge, the growth of these organisms will be slow. However, once you leave an empty carton at room temperature the organisms multiply quickly on the film of juice or milk left inside.

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536 puzzles & curious problems by Henry E. Dudeney, Martin Gardner


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