Which is a winning combination of digits?
[6908] 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: 36 - The first user who solved this task is Nasrin 24 T
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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: 36
The first user who solved this task is Nasrin 24 T.
#brainteasers #mastermind
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Only 25 cents!

One night a man was walking homewards when a thief jumped on him all of a sudden. Man and the thief were caught in a terrific tussle. They rolled about on the ground, and the man put up a tremendous fight, until at last the thief managed to get the better of him and pinned him to the ground. The thief then went through the man’s pockets and searched him all over. There was only a 25-cents coin he could lay his hands on.

The thief was so surprised at this that he asked the man why he had bothered to fight so hard just for a 25-cents.

"Was that all you wanted?" said the man, "I thought you were after the five-hundred dollars I've got in my shoe!"

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Crystal rectifier

In 1874, a paper by Ferdinand Braun (1850-1918) was published in the Annalen der Physik und Chemie describing his discovery of the electrical rectifier effect. He observed that certain crystals of metal sulphides have a larger or smaller resistance to an electric current, depending on its direction of flow. He used a galena crystal, a semiconductor material composed of lead sulfide. He found the rectifying effect especially true if at least one of the electrodes was a pointed wire. Thus, he had discovered the point-contact rectifier effect, the first semiconductor device. This effect wasn't used until over 30 years later in the form of the “cat's whisker”crystal radio detector which ultimately led to the point-contact transistor first produced in 1948.
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