BRAIN TEASERS

# 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.
The first user who solved this task is Sanja Šabović.
#brainteasers #mastermind

### A gentleman is preparing to bo...

A gentleman is preparing to board a plane, when he hears that the Pope is on the same flight. “This is exciting,” thinks the gentleman. “Perhaps I'll be able to see him in person.” Imagine his surprise when the Pope sits down in the seat next to him. Shortly after take-off, the Pope begins a crossword puzzle. Almost immediately, the Pope turns to the gentleman and says, “Excuse me, but do you know a four letter word referring to a woman that ends in ‘unt?’” Only one word leaps to mind. “My goodness,” thinks the gentleman, “I can't tell the Pope that. There must be another word.” The gentleman thinks for quite a while, and then it hits him. Turning to the Pope, the gentleman says, “I think the word you're looking for is ‘aunt.’” “Of course,” says the Pope. “Do you have an eraser?”
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## Brain Teasers

puzzles, riddles, mathematical problems, mastermind, cinemania...

### Michael Hartley Freedman

Born 21 Apr 1951.American mathematician who was awarded the Fields Medal in 1986 for his proof of the conjecture in four dimensions (1982). The Poincaré conjecture, one of the famous problems of 20th-century mathematics, asserts that a simply connected closed 3-dimensional manifold is a 3-dimensional sphere. The higher dimensional Poincaré conjecture claims that any closed n-manifold which is homotopy equivalent to the n-sphere must be the n-sphere. For values of n at least 5, a solution was given by Smale in 1961. Two decades later, Freedman proved the conjecture for n = 4. However, the original conjecture for n=3 the remained open. Grigori Perelman gave a complete proof in 2003.«
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