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Find number abc

If 7a7bc - abb70 = 791c find number abc. Multiple solutions may exist.

Correct answers: 20

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What stays in one corner bu...

Q: What stays in one corner but travels around the world?
A: A stamp.

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Explorer 38

In 1968, the Explorer 38, an unmanned U.S. spacecraft was launched to measure galactic radio sources and study low frequencies in space. It was one of a series of 55 scientific satellites launched between 1958-75.

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