Replace the question mark with a number
[3271] Replace the question mark with a number - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 490 - The first user who solved this task is Vladimir Krnac
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Replace the question mark with a number

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 490
The first user who solved this task is Vladimir Krnac.
#brainteasers #math #riddles
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When someone says to me great minds think alike

When someone says to me great minds think alike, i just look at them and think “You dirty bastard”
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Steamboat

In 1803, a patent was issued for the engine used on a twin-screw propeller steamboat built by John Stevens of Hoboken, N.Y. in the same year. The engine was a double direct-acting noncondensing engine with a 4.5-inch cylinder and 9-inch stroke. The boat was 25-feet-long and four-feet wide, with two 5-foot screw propellers with four blades set at an angle of 35º. It successfully navigated in New York Harbor in 1804. Stevens also developed the first sea-going steamship, initiated regular ferry service from New Jersey to New York, and designed and built the first American steam locomotive. In addition, he proposed a vehicular tunnel under the Hudson River, and the use of an elevated railroad in New York City.*
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