MATH PUZZLE: Can you replace...
[4360] MATH PUZZLE: Can you replace... - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 135 - The first user who solved this task is Thinh Ddh
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MATH PUZZLE: Can you replace...

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 135
The first user who solved this task is Thinh Ddh.
#brainteasers #math #riddles
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Hot Robin, Hot Summer

It's been really hot this summer.
The other day I saw a robin pulling a worm out of the ground using potholders.

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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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