MAGIC SQUARE: Calculate A+B-C
[7105] MAGIC SQUARE: Calculate A+B-C - The aim is to place the some numbers from the list (6, 7, 11, 13, 15, 16, 20, 52, 53, 57) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A+B-C. - #brainteasers #math #magicsquare - Correct Answers: 5
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MAGIC SQUARE: Calculate A+B-C

The aim is to place the some numbers from the list (6, 7, 11, 13, 15, 16, 20, 52, 53, 57) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A+B-C.
Correct answers: 5
#brainteasers #math #magicsquare
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Watch For Fallen Rocks

Driving down a remote road, a motorist sees a sign that says: "Watch For Fallen Rocks."

A couple of miles of careful driving later, he spots some pebbles and stops to pick a few up. Arriving in the next town, the motorist carries the stones into the highway maintenance office.

Placing them on the counter, he says to an official: "Here are your fallen rocks. Now where's my watch?"

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Fourier series

In 1807, Fourier's memoir On the Propagation of Heat in Solid Bodies, was read to the Paris Institute, an important mathematical work, containing what we now call Fourier series, which he had worked upon since around 1804. A committee consisting of Lagrange, Laplace, Monge and Lacroix was set up to report on the work. Although now highly regarded, at the time, this memoir caused controversy. Lagrange and Laplace objected to Fourier's expansions of functions as trigonometrical series (the Fourier series). It was not until 1822 that his prize winning essay Théorie analytique de la chaleur was published by the Académie des Sciences. Jean Delambre, Secretary to the mathematical section, had arranged for the printing before he died.
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