Find the number of ways to p...
[1832] Find the number of ways to p... - Find the number of ways to place three black pawns on a chessboard. - #brainteasers #math - Correct Answers: 23 - The first user who solved this task is Neelima Subrahmanyam
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Find the number of ways to p...

Find the number of ways to place three black pawns on a chessboard.
Correct answers: 23
The first user who solved this task is Neelima Subrahmanyam.
#brainteasers #math
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Amy, a blonde city girl, marri...

Amy, a blonde city girl, marries a farmer. One morning, on his way out to the fields, the farmer says to Amy, "The artificial insemination man is coming over to impregnate one of our cows today. I drove a nail into the two-by-four just above the cow's stall in the barn. You show him where the cow is when he gets here, okay?" So the farmer leaves for the fields.
After a while, the artificial insemination man arrives and knocks on the front door. Amy takes him down the barn. They walk along long row of cows and when she sees the nail, she tells him, "This is the one. This one right here."
Terribly impressed by what he seemed to think just might be another ditzy blonde, the man asks, "How did you know this is the cow to be bred?"
"That's simple. By the nail over its stall," Amy explains. Then the man asks, "What's the nail for?"
"I guess it's to hang your pants on," she tells him as she walks away.
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Edison patent

In 1922, Thomas A. Edison was issued a U.S. patent for a "Storage-Battery Electrode and the Production of Same" (No. 1402751). The electrodes were intended for batteries of the Edison type using nickel hydroxide for the active material for the positive elements and electrolytically active iron as the active material for the negative elements in an alkaline solution. The improved electrode element was designed to provide a high discharge rate by decreasing the internal resistance of the cell. The electrode element consisted of a thin metallic plate with small and closely adjacent perforations. The metal surface had a thin coating or film of a hydroxideof a suitable metal (preferable nickel) applied by electrolytic deposition.«[Image: one of the patent diagrams showing a fragmental sectional view of the electrode element.]
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