Which is a winning combination of digits?
[600] 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. - #brainteasers #mastermind - Correct Answers: 66 - The first user who solved this task is Sanja Šabović
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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: 66
The first user who solved this task is Sanja Šabović.
#brainteasers #mastermind
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A dentist ran out of anaesthet...

A dentist ran out of anaesthetic just before the last extraction for the day was scheduled.
He gave the nurse a very large needle, instructing her to jab it hard into the patient's butt when the signal was given, so it would take his attention away from the tooth extraction.
It all happened in an instant.
The nurse, patient, and pliers were in place. The signal was given, and the nurse bayoneted the patient with the needle just as the dentist yanked the tooth.
Afterwards, the dentist asked, "Hurt much?"
The patient hesitated, "Didn't hardly feel it come out. And, man, those roots were really deep!"
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Achromatic lenses

In 1758, optician John Dolland, having created achromatic lenses, reported this to the Royal Society. Isaac Newton had described the blurring effect due to chromatic abberation, but could not solve the problem in simple lenses, which was important in the preparation of lenses for telescopes and microscopes. A concave face of a lens of flint glass (which has a greater color dispersion than crown glass) is cemented to a convex face of a crown glass lens. Thus the dispersion properties causing chromatic aberration are removed from both lenses simultaneously. Although Dollond patented the discovery of the achromatic lens in the mid-18th century, it is widely believed that he was not its inventor, but learned about it from lens maker George Bass.
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