Replace the question mark with a number
MATH PUZZLE: Can you replace the question mark with a number?Correct answers: 54
The first user who solved this task is On On Lunarbasil.
#brainteasers #math #riddles
Edison patentIn 1880, Thomas A. Edison was granted a U.S. patent for his invention of an "Electro-Chemical Receiving-Telephone" (No. 231,704). |