Replace the question mark with a number
[3030] Replace the question mark with a number - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 228 - The first user who solved this task is Maryam Pouya
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Replace the question mark with a number

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 228
The first user who solved this task is Maryam Pouya.
#brainteasers #math #riddles
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Two students were arguing when...

Two students were arguing when their teacher entered the classroom. The teacher says, “Why are you arguing?” One boy answers, “We found a ten dollar bill and decided to give it to whoever tells the biggest lie.” "You should be ashamed of yourselves," said the teacher, "When I was your age I didn’t even know what a lie was." The boys gave the ten dollars to the teacher.
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Railroad car coupler

In 1897, a U.S. patent was issued to black American inventor, Andrew Jackson Beard for his invention of the "Jenny coupler," (U.S. No. 594,059). It does the dangerous job of hooking railroad cars together by simply allowing them to bump into each other, when "horizontal jaws engage each other to connect the cars." Beard's idea has probably saved countless lives and limbs. It remains in use today. He received $50,000 for the patent rights to the "Jenny Coupler." Beard was born a slave on a plantation in Alabama, shortly before slavery ended. He was a farmer, carpenter, blacksmith, a railroad worker, a businessman and finally an inventor. Beard's other patents included a steam driven rotary engine, and a double plow.
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