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Find number abc

If c9cac - 4c937 = 13c6b find number abc. Multiple solutions may exist.

Correct answers: 2

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Photographic memory

Are people born with a photographic memory?

Or does it take time to develop?

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First TV transmission in UK

In 1925, the first television transmission was seen in London, England. John Baird built the transmitter in his attic from a tea chest, cardboard scanning discs, an empty biscuit box, old electric motors, darning needles, motorcycle lamp lenses, piano wire, glue, string, and sealing wax.

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