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Find number abc

If 9b222 - 5b753 = 39ac9 find number abc. Multiple solutions may exist.

Correct answers: 41

The first user who solved this task is Nílton Corrêa De Sousa.

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In 1983, the space shuttle Challenger roared into orbit on its maiden voyage. It was named after the British Naval research vessel HMS Challenger that sailed the Atlantic and Pacific oceans during the 1870's. Challenger joined the NASA fleet of reusable winged spaceships and flew nine successful Space Shuttle missions. But on 28 Jan 1986, its tenth launch, the Challenger and its crew of seven were lost 73 seconds after launch when a booster failure resulted in the breakup of the vehicle.

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