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Find number abc

If 3bb30 + 7abca = cca8aa find number abc. Multiple solutions may exist.

Correct answers: 2

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I wasn't originally...

“I wasn't originally going to get a brain transplant, but then I changed my mind.”

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Fountain pen

In 1830, D. Hyde of Reading, Pa., patented the fountain pen. However, it was 1884 before a truly practical fountain pen was invented by Lewis Waterman. In the first year, 200 Waterman pens were made by hand. Subsequently, Waterman designed machinery to produce them in larger quantities.

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