MATH PUZZLE: Can you replace...
[5349] MATH PUZZLE: Can you replace... - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 60 - The first user who solved this task is Alfa Omega
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MATH PUZZLE: Can you replace...

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 60
The first user who solved this task is Alfa Omega.
#brainteasers #math #riddles
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Ponderings Collection 30

If the black box flight recorder is never damaged during a plane crash, why isn't the whole airplane made out of the same stuff?
Why is there an expiration date on sour cream?
If most car accidents occur within five miles of home, why doesn't everyone just move 10 miles away?
If man evolved from monkeys and apes, why do we still have monkeys and apes?
I went to a bookstore and asked the saleswoman, "Where's the self-help section? She said if she told me, it would defeat the purpose.
If all those psychics know the winning lottery numbers, why are they all still working?
Why do we say something is out of whack? What is a whack?
Do infants enjoy infancy as much as adults enjoy adultery?
If a pig loses its voice, is it disgruntled?
Why do women wear evening gowns to nightclubs? Shouldn't they be wearing night gowns?
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Tungsten filaments

In 1913, Dr William David Coolidge patented (U.S. No. 1,082,933) a method for making ductile tunsten for the purpose of making filaments for electric lamps. When Coolidge joined the General Electric Research Laboratory (1905), he was given the task of replacing the fragile carbon filaments in electric light bulbs with tungsten filaments, although tungsten was difficult to work. He developed a way to superheat the metal tunsten in order to draw it out into the fine threads used for lamp filaments. Coolidge then improved the X-ray tube by using a heated tungsten filament cathode in vacuum producing electrons, instead of residual gas molecules in the tube. This permitted higher operating voltages, higher energy X rays and the treatment of deeper-seated tumors.
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