BRAIN TEASERS

# What number comes next?

Look at the series (17, 15, 11, 3, 6, 12, 5), determine the pattern, and find the value of the next number!
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math

### Southwest

A mother and her very young son were flying Southwest Airlines from Kansas City to Chicago. The little boy (who had been looking out the window) turned to his mother and asked, "If big dogs have baby dogs, and big cats have baby cats, why don't big airplanes have baby airplanes?"
The mother (who couldn't think of an answer) told her son to ask the stewardess.
So the boy went down the aisle and asked the stewardess. The stewardess, who was very busy at the time, smiled and said, "Did your Mom tell you to ask me?"
The boy said, "yes she did."

"Well, then, you go and tell your mother that there are no baby airplanes because Southwest always pulls out on time. Have your Mom explain that to you."

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### Gabriel Lippmann

Died 13 Jul 1921 at age 75 (born 16 Aug 1845). Gabriel Jonas Lippmann was a French physicist who wasawardedthe Nobel Prize for Physics in 1908 for producing the first colour photographic plate. Lippmann was a giant of his day in classical physics research, especially in optics and electricity. He worked in Berlin with the famed Hermann von Helmholtz before settling in Paris to head (in 1886) the Sorbonne's Laboratories of Physical Research until his death. His inventions include an instrument for precisely measuring minute differences in electrical power and the “coleostat”for steady, long-exposure sky photography.
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