Which number is missing?
Which number is missing?Correct answers: 220
The first user who solved this task is Eric Newton.
#brainteasers #math #riddles
Celluloid photographic filmIn 1898, Reverend Hannibal Williston Goodwin was issued a U.S. patent for his invention of "nitro cellulose transparent flexible photographic film pellicles." (No. 610,861). He made a sale of one roll at $2.50 to Thomas Alva Edison on 2 Sep 1889. |