Find the right combination
[437] Find the right combination - 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: 57 - The first user who solved this task is Sanja Šabović
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Find the right combination

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: 57
The first user who solved this task is Sanja Šabović.
#brainteasers #mastermind
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Always on Call

A doctor answers his phone and hears the familiar voice of a colleague on the other end of the line.
‘We need a fourth for poker,’ said the friend.
‘I’ll be right over,’ whispered the doctor.
As he was putting on his coat, his wife asked, ‘Is it serious?’

‘Oh yes, quite serious,’ said the doctor gravely. ‘In fact, there are three doctors there already!’

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Camera obscura

In 1544, a solar eclipse was viewed at Louvain, which was later depicted in the first published book illustration of the camera obscura in use. Dutch mathematician and astronomer Reinerus Gemma-Frisius viewed a solar eclipse using a hole in one wall of a pavillion to project the sun's image upside down onto the opposite wall. He published the first illustrationof a camera obscura, depicting his method of observation of the eclipse in De Radio Astronomica et Geometrica (1545). Several astronomers made use of such a device in the early part of the 16th century. Both Johannes Kepler and Christopher Scheiner used a camera obscura to study the activity of sunspots. The technique was known to Aristotle (Problems, ca 330 BC).
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