MATH PUZZLE: Can you replace...
MATH PUZZLE: Can you replace the question mark with a number?Correct answers: 56
The first user who solved this task is Roxana zavari.
#brainteasers #math #riddles
Pile driverIn 1791, John Stone of Concord, Mass., patented the pile driver, which he called a "driving pile for bridges." Over fifty years later, on 26 Jun 1847, a steam pile driver was patented in the U.S. by James Naysmyth of Patricroft, England (No. 5,172). |