What a winning combination?
[7582] What a winning 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: 4
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What a winning 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: 4
#brainteasers #mastermind
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Belated confession

A man in Amsterdam felt that he needed to confess, so he went to his priest.

"Forgive me, Father, for I have sinned,” he said. “During World War II, I hid a refugee in my attic."

"Well," said the priest. "That's not a sin."

"But I made him agree to pay me $20 for every week he stayed," the man explained.

"I admit that wasn't good, but you did it for a good cause," the priest replied.

"Oh, thank you, Father. That eases my mind,” the man said. “I have one more question, though."

"What is that, my son?" the priest inquired.

"Do I have to tell him the war is over?"

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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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