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Calculate the number 411

NUMBERMANIA: Calculate the number 411 using numbers [2, 9, 5, 2, 15, 638] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 26

The first user who solved this task is Roxana zavari.

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Like father like son

Joey's teacher sent a note home to his Mother saying, "Joey seems to be a very bright boy, but spends too much of his time thinking about sex and girls."

The Mother wrote back the next day, "If you find a solution, please advise. I have the same problem with his Father."

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U.S.S. Shenandoah airship launched

In 1923, the first American-built rigid dirigible was launched in Lakehurst, N.J, later christened the U.S.S. Shenandoah (“daughter of the stars”). It was the first of the Zeppelin type (ZR-1) to use helium gas, of which a supply was was available in the U.S. It was tested in flight the following month, on 3 Sep 1923, and christened 10 Oct 1923. Covered with an aluminum-painted fabric, it was 680 feet long, weighed 36 tons, could bear 55 tons, and carry enough fuel to cruise 5,000 miles at an average speed of 65 mph. It was commanded by Commander Zachery Lansdowne (1888-1925), an early Navy aviator, who died with 14 members of the crew when the airship was struck and destroyed in a violent thunderstorm on 3 Sep 1925 over Caldwell, Ohio, though 29 of the crew survived.

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