BRAIN TEASERS

# MAGIC SQUARE: Calculate A+B-C

The aim is to place the some numbers from the list (1, 4, 6, 24, 27, 29, 31, 33, 34, 36, 72) 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.
The first user who solved this task is Nasrin 24 T.
#brainteasers #math #magicsquare

### Dog playing piano

It is World Piano Day!

A man walks into a bar with a small dog under his arm and sits down at the counter, placing the dog on the stool next to him. The bartender says, "Sorry, pal. No dogs allowed."
The man says, "But this is a special dog – he plays the piano!"
The bartender replies, "Well, if he can play that piano, you both can stay... and have a drink on the house!"
So the man puts the dog on the piano stool, and the dog starts playing. Ragtime, Mozart... and then he plays some rock 'n' roll. The bartender and patrons are amazed.
Suddenly, a bigger dog runs in, grabs the small dog by the scruff of the neck, and drags him out. The bartender asks the man, "What was that all about?"
The man replies, "Oh, that was his mother. She wanted him to be a doctor."

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### Philipp Forchheimer

Born 7 Aug 1852; died 2 Oct 1933 at age 81.Austrian hydraulic engineer who made significant studies of groundwater hydrology. Early in his academic career, he worked on problems of soil mechanics. Later, he turned to hydraulic problems, establishing the scientific basis of the discipline by applying standard techniques of mathematical physics - in particular Laplace's equation - to problems of groundwater movement. Laplace's equation had already been well developed for heat flow and fluid flow. Forchheimer extended the preexisting mathematical theory to calculations of groundwater flow. He was also the first to both mathematically and experimentally examine the features of dambreak waves in a rectangular channel (with his PhD student Armin Schoklitsch).«
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