MATH PUZZLE: Can you replace...
MATH PUZZLE: Can you replace the question mark with a number?Correct answers: 2987
The first user who solved this task is Дејан Шкребић.
#brainteasers #math #riddles
Edison patentIn 1886, Thomas A. Edison was issued a patent for a "System of Electrical Distribution" (U.S. No. 343,017). |