What can be opened but can't b...
[1932] What can be opened but can't b... - What can be opened but can't be closed? - #brainteasers #riddles - Correct Answers: 117 - The first user who solved this task is Sanja Šabović
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What can be opened but can't b...

What can be opened but can't be closed?
Correct answers: 117
The first user who solved this task is Sanja Šabović.
#brainteasers #riddles
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I Want To Buy That

A blonde goes into a nearby store and asks a clerk if she can buy the TV in the corner.
The clerk looks at her and says that he doesn't serve blondes, so she goes back home and dyes her hair black.
The next day she returns to the store and asks the same thing, and again, the clerk said he doesn't serve blondes.
Frustrated, the blonde goes home and dyes her hair yet again, to a shade of red.
Sure that a clerk would sell her the TV this time, she returns and asks a different clerk this time.
To her astonishment, this clerk also says that she doesn't serve blondes.
The blonde asks the clerk, "How in the world do you know I am a blonde?"
The clerk looks at her disgustedly and says,"That's not a TV -- it's a microwave!"
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Xerography

In 1938, xerography was demonstrated by Chester F. Carlson. With his assistant, Otto Kornei, Carlson used a sulphur coating on a zinc plate, vigorously rubbed with a handkerchief to apply an electrostatic charge. A glass slide was prepared using India ink to write "10-22-38 ASTORIA," then laid on the sulphur surface in a darkened room. After illuminating them with a bright incandescent lamp for a few seconds, the slide was removed. When lycopodium powder was sprinkled on the sulphur surface and blown off, there remained a near-perfect image of the writing. Permanent copies were made by transferring the powder images to wax paper and heating the sheets to melt the wax. Xerox is a term coming from "xerography" which means dry writing and is a trademark.
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