BRAIN TEASERS

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What number comes next?

Look at the series (4832, 8420, 6280, 2620, 4880, ?), determine the pattern, and find the value of the next number!

Correct answers: 54

The first user who solved this task is Thinh Ddh.

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Chatting On The Plane

A man was recently flying to New York. He decided to strike up a conversation with his seat mate.
"I've got a great policeman joke. Would you like to hear it?"
"I should let you know first that I am a policeman."
"That's OK. I'll tell it really slow!"

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Berliner helicopter flight

In 1908, Emile Berliner (who invented the gramophone in 1887) in a trial of his first "test-rig" helicopter design, found it could potentially lift double its weight. While the Wright brothers were working on powered manned flight, by 1903, Berliner tested a 7-ft model rocket-powered airplane, which flew 40-ft before tumbling to ground. He began, in 1907, designing his helicopter with tandem intermeshing rotors. Although the Wrights by then had a successful rigid-wing aircraft, Berliner recognised the versatility of a helicopter. The 36-hp rotary engine he developed with the Adams-Farwell Company was the first application in aviation of the rotary engine, and had a weight advantage. He founded the Gyro Motor Company to promote rotary engines in aviation.«

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