Replace the question mark with a number
[4000] Replace the question mark with a number - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 169 - The first user who solved this task is H Tav
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Replace the question mark with a number

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 169
The first user who solved this task is H Tav.
#brainteasers #math #riddles
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After a very busy day, a commu...

After a very busy day, a commuter settled down in her seat and closed her eyes as the train departed London for Liverpool. As the train rolled out of the station, the guy sitting next to her pulled out his mobile phone and started talking in a loud voice: "Hi sweetheart, it's Eric, I'm on the train, I know it's the six thirty and not the four thirty but I had a long meeting, no, honey, not with that floozie from the accounts office, with the boss. No sweetheart, you're the only one in my life, yes, I'm sure, cross my heart."
Fifteen minutes later, he was still talking loudly, when the young woman sitting next to him, who was obviously angered by his continuous rabble, yelled at the top of her voice: "Hey, Eric, turn that stupid phone off and get yourself back into bed!"
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Elevator

In 1861, the safety elevator was patented as a “Hoisting Apparatus”by the American inventor, Elisha G. Otis, of Yonkers, New York. (No. 31,128). His invention was designed to arrest a fall in case of the lifting rope breaking. It used spring-loaded pawls that would release and engage in a mortised track in the walls of the shaft. In 1853, Otis had demonstrated a freight elevator equipped with a safety device to prevent falling in case a supporting cable should break. This increased public confidence and Otis established a company for manufacturing elevators. The first elevator for public use was a steam driven type installed by Otis Brothers (1857) in the five story Broadway department store of E.W Haughtwhat & Co.
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