MATH PUZZLE: Can you replace...
MATH PUZZLE: Can you replace the question mark with a number?Correct answers: 778
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math #riddles
Radio compassIn 1920, a device known as the radio compass was used for the first time on a U.S. Navy airplane near Norfolk, Virginia on this day. |