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Calculate the number 960

NUMBERMANIA: Calculate the number 960 using numbers [3, 8, 6, 9, 83, 520] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 20

The first user who solved this task is Thinh Ddh.

#brainteasers #math #numbermania

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Phone Issues

I just love it when you are at a play or movie theater and they make the announcement, "Please silence your cell phones..."
Why do they have to announce that?
I mean how many people are carrying around a landline phone?

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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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