The famous task of Edward Luke

Published April 26, 2020

The famous task of Edward Luke

At a scientific congress during breakfast, which was attended by many famous mathematicians from different countries, the French mathematician Eduard Luca announced to his assembled colleagues that he wants to offer them one of the most difficult tasks: suppose that every day at noon he leaves from Le Havre to New York a ship...

What are the labyrinths?

Published November 03, 2020

What are the labyrinths?

Labyrinths are one of the mathematical wonders, the origin of which is lost in the legendary twilight of history. Karl Lepsius, the famous Egyptologist, argued that the name "labyrinth" comes from the Egyptian words: "lery" - "holy institution" and "rе-hint" - "mouth of the channel". Other scholars believe that this is a word of Greek origin, meaning "underground passages"...

The second famous theorem of Pythagoras

Published January 04, 2021

The second famous theorem of Pythagoras

Everyone knows the first famous theorem of Pythagoras from school. The second, exceptional in importance, geometric theorem, attributed to Pythagoras, is the theorem on the sum of the angles of a triangle, equal to two right angles. Historians of mathematics are trying to figure out how the brilliant mathematician...

Gulliver's geometry

Published March 22, 2021

Gulliver's geometry

Gulliver's geometry was very well observed by the author of Gulliver's Travels. He very discreetly avoided the danger of being entangled in geometric relations. The reader will no doubt remember that in the land of the Lilliputians a foot was an inch, and in the land of giants, on the contrary, an inch was a foot. In other words, among the Lilliputians...

How much water is flowing in the river?

Published November 07, 2021

How much water is flowing in the river?

One way or another, you can always determine the speed with which the water jets of the river are flowing. The second part of the preparatory work required to calculate how much water is flowing in the river is more difficult - determining the cross-sectional area of the water. To find the size of this area - what is commonly called the "living section" of the river, it is necessary to make a plan of this section...

Apparent dimensions of the moon

Published January 30, 2022

Apparent dimensions of the moon

How big does a full moon appear to you in the sky? From different people it is necessary to hear very different answers to this question. The most unexpected answer can be heard the following: I don’t know. I'm not from here. Therefore, the question of the apparent dimensions of the moon is very interesting...

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