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Find number abc

If 36cbb + ab404 = 58bb5 find number abc. Multiple solutions may exist.

Correct answers: 12

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My North Korean Friend

I asked my North Korean friend how it was to live in North Korea.
He said he can’t complain.

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Tesla patents

In 1888, Nikola Tesla was issued several patents relating to the induction magnetic motor, alternating current (AC) sychronous motor, AC transmission and electricity distribution (Nos. 381,968-70; 382,279-82)

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