Replace the question mark with a numberMATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 147
The first user who solved this task is Sanja Šabović.
#brainteasers #math #riddles
Herbert Osborne YardleyDied 7 Aug 1958 at age 69 (born 13 Apr 1889).American cryptographer who organized and directed the U.S. government's first formal code-breaking efforts during and after World War I. He began his career as a code clerk in the State Department. During WW I, he served as a cryptologic officer with the American Expeditionary Forces in France during WWI. In the 1920s, when he was chief of MI-8, the first U.S. peacetime cryptanalytic organization, he and a team of cryptanalysts exploited nearly two dozen foreign diplomatic cipher systems. MI-8 was disbanded in 1929 when the State Department withdrew funding. Jobless, Yardley caused a sensation in 1931 by publishing his memoirs of MI-8, The American Black Chamber, which caused new security laws to be enacted.