Can you replace the question mark with a number?
[6431] Can you replace the question mark with a number? - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 137 - The first user who solved this task is Alexander Filimonoff
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Can you replace the question mark with a number?

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 137
The first user who solved this task is Alexander Filimonoff.
#brainteasers #math #riddles
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World Post Day Jokes

On 9th October we celebrate World Post Day! Here's some postal humor for you:

What’s a postman’s favorite type of music?
Mail-ody!

Why did the feminist refuse to work at the post office?
Because it was a mail dominated industry

Have you heard about the dyslexic spy who got caught with a suitcase nuke in the post office?
Fission mailed!

So I got a phone call from the post office today...
...complaining that my dog is attacking a postman on a bike. But I told them "It can't be my dog... he doesn't even know how to ride a bike".

Did you hear that the Post Office just recalled their latest stamps?
They had pictures of lawyers on them ...and people couldn't figure out which side to spit on.

#worldpostday
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Charles-Eugène Delaunay

Born 9 Apr 1816; died 5 Aug 1872 at age 56.French mathematician and astronomer whose theory of lunar motion advanced the development of planetary-motion theories. After 20 years of work, he published two volumes on lunar theory, La Théorie du mouvement de la lune (1860,1867). This is an important case of the three body problem. Delaunay found the longitude, latitude and parallax of the Moon as infinite series. These gave results correct to 1 second of arc but were not too practical as the series converged slowly. However this work was important in the beginnings of functional analysis. Delaunay succeeded Le Verrier as director of the Paris Observatory in 1870 but two years later he and three companions drowned in a boating accident.
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