Solve Math Puzzle
IF 1234 + 4567 = 284, 3012 + 8888 = 640, 5111 + 9291 = 95 THEN 9378 + 9999 = ?Correct answers: 35
The first user who solved this task is Roxana zavari.
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Tin can key opener patentedIn 1866, the first U.S. patent for a tin can with a key opener was issued to J. Osterhoudt of New York City (No. 58,554). Described as an "improved method of opening tin cans," the can featured a projecting lip and key.«* |