MATH PUZZLE: Can you replace...
[4360] MATH PUZZLE: Can you replace... - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 135 - The first user who solved this task is Thinh Ddh
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MATH PUZZLE: Can you replace...

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 135
The first user who solved this task is Thinh Ddh.
#brainteasers #math #riddles
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Jay Larson: Embarrassing Purchase

I bought a plunger the other day. You ever bought a plunger? Its an embarrassing purchase. At first, you think its no big deal. Stand in the line, swinging it. And then you realize everybody knows; you got a situation at home. Nobody buys a plunger on a whim.
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Edison patent

In 1912, Thomas A. Edison was issued patents for a “Conveyor” related to a cement kiln, and for a “Phonograph-Stylus” formed of crystallized boron, which because of its hardness (in fact, much harder than sapphire) could operate on sound records formed from hard materials without wearing away. Small crystals of boron could be formed in an electric furnace, and were easier to polish than diamond, while not being as fragile. (U.S. Nos. 1,041,756 and 1,041,983).
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