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Calculate the number 508

NUMBERMANIA: Calculate the number 508 using numbers [1, 5, 1, 7, 44, 206] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 43

The first user who solved this task is Sanja Šabović.

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When you truly don't care

When you truly don't care when anyone thinks of you, you have reached a dangerously awesome level of freedom.

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World aircraft speed record

In 1956, Bell X-2 rocket plane sets world aircraft speed record of 3,050 kph. The X-2 was a swept-wing, rocket-powered research aircraft used to investigate the problems of aerodynamic heating, stability, and control effectiveness at high speeds and altitudes. The X-2 was carried to launch altitude by a Boeing B-50, and then released. Lt. Col. Frank "Pete" Everest piloted this ninth powered flight and reached Mach 2.87. (Later that year, on 27 Sep 1956, its 13th powered flight by Capt M. Apt reached Mach 3.2. The flight ended with loss of control, a crash, and the death of the pilot.)Image: X-2 on ramp with B-50 mothership and support crew.

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