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Find number abc

If 5b34a + 4333b = 102ca7 find number abc. Multiple solutions may exist.

Correct answers: 11

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Happy St Patrick's Day

"That guy was so happy that it's St Patrick's day, that he was literally bouncing off the walls!"
"Who was it?"
"Rick O'Shea."

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Gerardus Mercator

Died 2 Dec 1594 at age 82 (born 5 Mar 1512).Flemish cartographer whose most important innovation was a map, embodying what was later known as the Mercator projection, on which parallels and meridians are rendered as straight lines spaced so as to produce at any point an accurate ratio of latitude to longitude. He also introduced the term atlas for a collection of maps.

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