Replace the question mark with a number
MATH PUZZLE: Can you replace the question mark with a number?Correct answers: 526
The first user who solved this task is On On Lunarbasil.
#brainteasers #math #riddles
Charles F. KetteringDied 25 Nov 1958 at age 82 (born 29 Aug 1876). Charles Franklin Kettering was an American engineer whose 140 patents included the electric starter, car lighting and ignition systems. In his early career, with the National Cash Register Co., Dayton (1904-09), he created the first electric cash register with an electric motor that opened the drawer. When he co-founded the Dayton Engineering Laboratories Company (DELCO, with Edward A. Deeds) he invented the key-operated self-starting motor for the Cadillac (1912) and it spread to nearly all new cars by the 1920's. As vice president and director of research for General Motors Corp. (1920-47) he developed engines, quick-drying lacquer finishes, anti-knock fuels, and variable-speed transmissions.« |