Find number abcIf 1c216 + 5a259 = 6cb75 find number abc. Multiple solutions may exist.
Correct answers: 40
The first user who solved this task is Djordje Timotijevic.
Radio paging serviceIn 1950, the first American radio paging service, Aircall of New York City, sent the first page to a doctor who was on a golf course 25 miles away. Subscribers carried a six-ounce pocket radio receiver and could hear their call numbers repeated in numerical sequence on the air at least once per minute within a 30-mile radius.