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Solve This Number Puzzle

What number should fill in the blank? (8, 43, 11, 41, ?, 39, 17)

Correct answers: 215

The first user who solved this task is Chindu Cho.

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New Yorkers and Light Bulbs

Q: How many New Yorkers does it take to screw in a light bulb?
A: One. What are you -- stupid?

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John Aitken

Died 14 Nov 1919 at age 80 (born 18 Sep 1839).Scottish physicist and meteorologist who is known for his studies on atmospheric dust, the formation of dew, cyclones and evaporation. He invented the koniscope to detect and study atmospheric dust particles. He determined that condensation of atmospheric water vapor from clouds and fogs begins on the surface of microscopic particles (now known as Aitken nuclei) as a crucial step in the formation of rain and dew. Combustion produces a profusion of such particles. Suffering from ill health, he worked from a laboratory in his Falkirk home. Much of his work was published in the journals of the Royal Society of Edinburgh.«

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