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Find number abc

If 7b2c3 - ac210 = 1a083 find number abc. Multiple solutions may exist.

Correct answers: 2

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100 years old

Reporter: "So you are 100 years old. How did you manage to live so long?"
Old man: "Well, son, I got married when I was 21. The wife and I decided that if we had arguments, the loser would take a long walk to get over being mad. I suppose I have been benefitted most by 79 years of fresh air."

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Ice cream freezer

In 1843, a U.S. patent was issued, antedated to 29 Jul 1843, for a hand-cranked ice-cream freezer invented by Nancy M. Johnson (No. 3,254). In previous designs, the ice-cream mixture was held in an inner container, which vessel was itself was rotated within an outer container of ice and salt. Her invention was to add a vertical shaft with curved, perforated paddles within the inner vessel, and reaching nearly to its inside wall. Stirring in one direction would carry the the liquid or semi-fluid mass from the centre to the circumference. Turning in the opposite direction would scrape frozen material and carry it from the inner walls to the centre of the freezer. Thus fresh matter continuously reached the freezing surface.«[Image: detail from patent diagram showing inner container and its paddle.]

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