Little math game … Find out how many inhabitants there are in the village.
In a town, a third of the inhabitants work in the fields, half of the rest work in the mine, and the other 600 inhabitants work in city.
How many inhabitants does the village have?
Reply
1,800.
A third are in the fields, there are still two thirds of which half is a third. The others, those who work in the mine, are therefore also a third and number 600. The total number of inhabitants is therefore equal to 1,800.
Learn more about Hervé Lehning
Normalian and agrégé in mathematics, Hervé Lehning taught his discipline for more than forty years. Crazy about cryptography, member of the Association of Cipher and Information Security Reservists, he in particular unraveled the secrets of Henry II’s cipher box.
Also to discover: The universe of secret codes from Antiquity to the Internet published in 2012 by Ixelles.
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