How many different squares c...
[1810] How many different squares c... - How many different squares can be found in the shape shown in the illustration? - #brainteasers #math #riddles - Correct Answers: 165 - The first user who solved this task is Ilan Amity
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How many different squares c...

How many different squares can be found in the shape shown in the illustration?
Correct answers: 165
The first user who solved this task is Ilan Amity.
#brainteasers #math #riddles
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Paper shredder...

The new employee stood before the paper shredder looking confused.

"Need some help?" a secretary asked.

"Yes," he replied. "How does this thing work?"

"Simple," she said, taking the fat report from his hand and feeding it into the shredder.

"Thanks, but where do the copies come out?"

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Mercury vapour lamp

In 1901, the first U.S. patents for a mercury vapour lamp were issued to inventor Peter Cooper Hewitt of New York City (Nos. 682,692-99). These eight patents covered the design of an elongated vacuum tube fitted with a mercury electrode at one end and an iron electrode at the other end. Light was produced when an electric current passed through the mercury vapour. However, it was a garish blue-green colour, lacking any red light. The lamps were subsequently manufactured by the Cooper Hewitt Electric Company in New York City, in Dec 1902. They were an important forerunner of today's fluorescent lights.«
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