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 Previous Puzzle Next Puzzle Puzzle L-8.  BEER Allan, Bill, Carl, Don, and Ethan went to bar to have some beer.  Allan and Ethan each drunk three different brands of beer.  The rest of them had two different brands of beer from among the following:  Miller, Budwieser, Heineken, Guinness, and Tsingtao. Allan was the only one who drank Miller. Bill did not drink Guinness. Carl did not drink Budwieser. Don did not drink Heineken. Ethan was the only one who drank Tsingtao. Two of them had Budwieser. Name the brands of beer each of them had. Previous Puzzle Next Puzzle

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PRIME NUMBERS

Prime numbers have captured the hearts of many mathematicians for centuries.  During 18th century, mathematician Christian Goldbach (1690-1764) wrote to Leonhard Euler that he believed it could be shown that every even integer greater than 2 is the sum of 2 primes.  For example, 30 = 23+7 and  36 = 13+23.  Until now, this conjecture has neither been proved or disproved.

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