BRAIN TEASERS

# Calculate the number 8971

NUMBERMANIA: Calculate the number 8971 using numbers [2, 8, 9, 5, 92, 852] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math #numbermania

### Trying To Fix A Clock

Harvey's grandfather clock suddenly stops working right one day, so he loads it into his van and takes it to a clock repair shop.
In the shop is a little old man who insists he is Swiss, and has a heavy German accent. He asks Harvey, "Vat sims to be ze problem?"
Harvey says, "I'm not sure, but it doesn't go 'tick-tocktick -tock' anymore. Now it just goes 'tick...tick...tick.'"
The old man says, "Mmm-Hm!" and steps behind the counter, where he rummages around a bit. He emerges with a huge flashlight and walks over the grandfather clock.
He turns the flashlight on, and shines it directly into the clocks face. Then he says in a menacing voice, "Ve haf vays of making you tock!"
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### L. L. Thurstone

Died 29 Sep 1955 at age 68 (born 29 May 1887).L(ouis) L(eon) Thurstone was an American psychologist who improved psychometrics, the measurement of mental functions, and developed statistical techniques for multiple-factor analysis of performance on psychological tests. In high school, he published a letter in Scientific American on a problem of diversion of water from Niagara Falls; and invented a method of trisecting an angle. At university, Thurstone studied engineering. He designed a patented motion picture projector, later demonstrated in the laboratory of Thomas Edison, with whom Thurstone worked briefly as an assistant. When he began teaching engineering, Thurstone became interested in the learning process and pursued a doctorate in psychology.
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