Replace the question marks w...
[3188] Replace the question marks w... - Replace the question marks with a numbers and calculate product these numbers. - #brainteasers #math - Correct Answers: 73 - The first user who solved this task is Allen Wager
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Replace the question marks w...

Replace the question marks with a numbers and calculate product these numbers.
Correct answers: 73
The first user who solved this task is Allen Wager.
#brainteasers #math
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Electric railway

In 1894, black American inventor, William B. Purvis patented an "Electric Railway" No. 519,291. This was just one of several patents obtained in his life. Others covered a magnetic car balancing device, electric railway switch, ten for paper bag machines. His earliest patents were for a bag fastener, a hand stamp, and a fountain pen.
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