MATH PUZZLE: Can you replace...
MATH PUZZLE: Can you replace the question mark with a number?Correct answers: 158
The first user who solved this task is Allen Wager.
#brainteasers #math #riddles
Radio patentIn 1914, a U.S. patent was issued to Edwin H. Armstrong for a “Wireless Receiving System” which described his famous regenerative, or feed-back, circuit (No. 1,113,149). This invention started Armstrong's career of innovation. He went on to become a pioneer in FM radio broadasting.« |