Determine the value of the number CBBA
Determine the value of the number CBBACorrect answers: 76
The first user who solved this task is Djordje Timotijevic.
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Magic lantern slidesIn 1850, the first U.S. patent for magic lantern slides made of glass plate was issued to their inventor Frederick Langenheim of Philadelphia, Pa. (No. 7,784) as an "improvement in photographic pictures on glass." |