Find the right combination
[7222] 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: 8
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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: 8
#brainteasers #mastermind
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Vacuum Cleaner Salesman

A little old lady answered a knock on the door one day, only to be confronted by a well-dressed young man carrying a vacuum cleaner. Good morning," said the young man. "If I could take a couple of minutes of your time, I would like to demonstrate the very latest in high-powered vacuum cleaners.
"Go away!" said the old lady. "I haven't got any money!" and she proceeded to close the door..
Quick as a flash, the young man wedged his foot in the door and pushed it wide open. "Don't be too hasty!" he said. "Not until you have at least seen my demonstration." And with that, he emptied a bucket of horse manure onto her hallway carpet. "If this vacuum cleaner does not remove all traces of this horse manure from your carpet, Madam, I will personally eat the remainder."
The old lady stepped back and said, "Well I hope you've got a damned good appetite, because they cut off my electricity this morning.."    

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Cryotron

In 1957, the cryotron, a superconductive computer switch was announced in a press release by the Massachusetts Institute of Technology. Developed by Dudley A Buck, the cryotron was the first practical use of superconductivity—the ability of some metals to conduct current with no resistance at a temperature of a few degrees above absolute zero. A fine hair-thickness wire is coiled around a straight wire cooled by liquid helium. Current passes in the straight wire unless halted by the effect of a magnetic field when a current flows in the coil, thus acting like a switch. The cryotron was hailed as a revolutionary device for miniaturizing the room-sized computers of the 1950s. Buck's invention was first recorded in his lab notebook on 15 Dec 1953, and he coined the term “cryotron” in his an entry in Feb 1954.«[Image: in the hand of its inventor, the cryotron, so incredibly small 100 cryotrons could fit in a thimble.]
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