BRAIN TEASERS

# Calculate the number 3824

NUMBERMANIA: Calculate the number 3824 using numbers [1, 4, 4, 9, 83, 933] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
#brainteasers #math #numbermania

### A magician was working on a cr...

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 does 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 is 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 sunk. The magician found himself on a piece of wood, in the middle of the ocean, with the parrot of course. They stared at each other with hate, but did not utter a word. This went on for a day, and another, and another.
After a week the parrot finally said: OK. I give up. What'd you do with the boat ?
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### Telephone switching

In 1879, the first U.S. patent was issued for an automatic telephone switching system to Daniel Connolly of Philadelphia, Thomas A. Connolly of Washington, D.C. and Thomas J. McTighe of Pittsburgh (No. 222,458). The system consisted of a single-line wire, a battery of cells located at each telephone. and a dial switching mechanism for each line. Although this first system was crude in design and limited to a small number of subscribers, it introduced the general principle of later dial systems. The system, with eight stations connected, was exhibited at the Paris Exposition in 1881. The inventors made various modifications in subsequent patents. The system served a limited number of lines and was not introduced commercially.*
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