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# Which is a winning combination of digits?

The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.
Correct answers: 15
The first user who solved this task is Nílton Corrêa de Sousa.
#brainteasers #mastermind
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### Bowling again!

A man tells his wife that he's going out to buy cigarettes. When he gets to the store he finds out it's closed.

So the guy ends up going to the bar to use the vending machine. While there, he has a few beers and begins talking to this beautiful girl.

He has a few more beer and the next thing he knows he's in this girl's apartment and having quite a pleasurable time. The next thing he know it was 3:00 AM.

"Oh my, god, my wife is going to kill me!" he exclaimed. "Quick give me some talcum powder!"

She gets him some and he rubs it all over his hands. When he got home his wife is up waiting for him and she's furious. "Where the hell have you been!"

He says, "Well to tell you the truth, I went into a bar, had a few drinks, went home with this blonde and I slept with her." "Let me see your hands!" she demands. He shows his wife his powdery hands.

"Damn liar, you were out bowling again!"

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## Brain Teasers

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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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