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Calculate the number 6715

NUMBERMANIA: Calculate the number 6715 using numbers [4, 9, 6, 8, 69, 567] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 1

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Fairy tales...

When Chelsea Clinton was eight, Hillary was reading one of her favorite fairy tales.

"Mommy," asked Chelsea, "Do all fairy tales begin with "Once Upon a Time...?""

"No, dearest," replied Hillary, "sometimes they start with 'Darling, I have to work a little late at the office tonight...'"

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U.S. Naval Observatory

In 1830, the U.S. Naval Observatory, one of the oldest scientific agencies in the U.S., was established as the Depot of Charts and Instruments in Washington, D.C. Its primary mission was to care for the U.S. Navy's chronometers, charts and other navigational equipment. The first instrument installed was a 30-inch portable transit. Lieutenant Louis M. Goldsborough was the first officer in charge of the observatory. Today, the U.S. Naval Observatory is the preeminent authority in the areas of time keeping and celestial observing; determining and distributing the timing and astronomical data required for accurate navigation and fundamental astronomy.[Image: Officer-in-Charge of the Depot of Charts and Instruments 6 Dec 1830 - 11 Feb 1833, Lt Louis M. Goldsborough.]

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