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Find number abc

If c77bc - a050c = a7cb0 find number abc. Multiple solutions may exist.

Correct answers: 7

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Computer Chess

A computer once beat me at chess...
But it was no match for me at kickboxing!

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First US underground nuclear test

In 1957, the United States conducted its first underground nuclear test, in the Nevada desert, at Area 12 of the Nevada Test Site. The Atomic Energy Commission's (AEC) first fully contained underground nuclear detonation named the Rainier event, detonated in a horizontal tunnel, about 47 meters (1600 feet) into the mesa and 274 meters (900 feet) beneath the top of the mesa.

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