Which is a winning combination of digits?
[7370] 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: 6
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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: 6
#brainteasers #mastermind
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Learning From Teachers

Eight-year-old Sally brought her report card home from school. Her marks were good...mostly A's and a couple of B's.
However, her teacher had written across the bottom: "Sally is a smart little girl, but she has one fault. She talks too much in school. I have an idea I am going to try, which I think may break her of the habit."
Sally's dad signed her report card, putting a note on the back: "Please let me know if your idea works on Sally because I would like to try it out on her mother."  

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Fitch's steamboat tested

In 1787, inventor John Fitch demonstrated his steamboat on the Delaware River to delegates of the Continental Congress. Its top speed was 3 mph. These tests were completed years before Fulton built his steamboat. Early in 1787, the Colombian Magazine described the steam engine design as “similar to the late improved steam engines in Europe,” with a horizontal twelve-inch cylinder. The piston was proposed to give “thirty strokes in a minute; which will give the axle tree about forty revolutions. Each revolution of the axle tree moves twelve oars five and a half feet. As six oars come out of the water, six more enter the water... The oars work perpendicularly and make a stroke similar to the paddle of a canoe.”«
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