Calculate the number 4491
[8095] Calculate the number 4491 - NUMBERMANIA: Calculate the number 4491 using numbers [7, 5, 7, 4, 47, 946] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 0
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Calculate the number 4491

NUMBERMANIA: Calculate the number 4491 using numbers [7, 5, 7, 4, 47, 946] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 0
#brainteasers #math #numbermania
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The magician and the parrot

A magician was working on a cruise ship in the Caribbean. The audience would be different each week, so the magician allowed himself to do the same tricks over and over again.

There was only one problem: The captain's parrot saw the shows every week and began to understand what the magician did in every trick. Once he understood that, he started shouting in the middle of the show.

"Look, it's not the same hat!" "Look, he's hiding the flowers under the table!" "Hey, why are all the cards the Ace of Spades?"

The magician was furious but couldn't do anything, it was the captain's parrot after all.

One day the ship had an accident and sank. The magician found himself on a piece of wood, in the middle of the ocean, and of course the parrot was by his side.

They stared at each other with hate, but did not utter a word. This went on for several days.

After a week the parrot finally said, "Okay, I give up. What'd you do with the boat?"

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Guillaume Amontons

Died 11 Oct 1705 at age 42 (born 31 Aug 1663).French physicist who developed the air thermometer - which relies on increase in volume of a gas (rather than a liquid) with temperature - and used it (1702) to measure change in temperature in terms of a proportional change in pressure. This observation led to the concept of absolute zero in the19th century. Deaf since childhood, Amontons worked on inventions for the deaf, such as the first telegraph, which relied on a telescope, light, and several stations to transmit information over large distances. Amontons' laws of friction, relied upon by engineers for 300 years, state that the frictional force on a body sliding over a surface is proportional to the load that presses them together and is also independent of the areas of the surfaces.
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