What a winning combination?
[8124] 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: 1
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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: 1
#brainteasers #mastermind
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NO, YOU CAN'T BE CHALIE SHEEN...

NO, YOU CAN'T BE CHALIE SHEEN FOR HALLOWEEN!
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Magnetising metals

In 1744, Gowan Knight presented his research on magnetising metals to the Royal Society. The method he discovered for permanently magnetising hard steels. The use of steel instead of soft iron greatly improved the otherwise crude compass needles used by England's Royal Navy, which then had a much longer magnetized life. Knight took out a patent for his compass in 1766. He devised better ways to suspend compass needles, and introduced the rhomboid shape now common for compass needles.Reference: Philosophical Trans., No. 474, p. 161
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