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LEISURE IN SCHOOL

HOW TO KILL TIME

ON LESSON AT SCHOOL?



ENTERTAINMENT AT SCHOOL









   In 1969, when I studied in the 9th grade of the Soviet, average in all sense, school, has not yet been invented personal computers, there were no cell phones, there were no calculators. And some school the objects of that time were different special, sophisticated, finished to the level of the Inquisition, the form of submission of the material and especially its content. What was worth, for example, "socialist realism" in the lessons of literature and "congresses of the CPSU" in history lessons.    "Poor schoolchildren" with a normal psyche, not clouded on the fallen on them a stream of information, amused themselves at these lessons as best they could. We did not have much technical capacity for this: a notebook with sheets, lined in a box and a pen.    I bring to your attention several entertaining tasks , at the core which is the chess board. Play it on a paper sheet in a cell it is possible for a few seconds, to allocate black cells at This is not necessary. ENTERTAINMENT AT SCHOOL

PROBLEM PROBLEM

CHESS STONE

   The task is as follows: A chess horse must bypass all 64 cells chessboard, while on every square he must stop just one time. The starting cell is arbitrary.    Draw a rectangle of 64x64 cells on paper and number each the passed cage. Good luck to you! ENTERTAINMENT AT SCHOOL

GRAIN PROBLEM

ON THE CHESSBOARD


  This is an ancient task. It is based on a well-known legend: The powerful Shah, famous for his love of chess, He offered many travelers to play a game of chess with him, at a price which was the life of the player. Many heads flew away in this city, while play with the Shah did not agree with a certain young man who for his victory asked the shah for a grain of wheat in the following quantities: One grain of a chessboard is put on one grain of wheat, the second - 2, the third - 4, the fourth - 8, and so on put grain to all 64 cells, doubling the number of grains with each step. The unsuspecting shah agreed with the conditions and lost. History is silent about what happened next in this city, but The task of determining the total number of grains won was classical. It was included in the programming course for schoolchildren already in the 80 years of the last century.    However, even now, armed with calculators accurately calculate the total number of grains on the chessboard is not at all simple. And in 1969, calculate their number, having at hand only a sheet paper in the cage and pen was incredibly difficult. All participants This "insane" entertainment results were very different. Try it yourself on some "interesting" event, or on the road, where there is nothing more to do.   The total amount of grain is striking when you try to evaluate its weight. The grain mass is comparable to the mass of the Earth.
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