Using Mathematics As Chinese Propaganda
Thirty-one U.S. B-29 bombers and over forty U.S. fighter planes invaded our sky over Antung on April 12. These bombers aimlessly bombed the city of Antung. The number of bombs dropped by these planes was eighty more than the bombs dropped by the twelve U.S. B-29's on March 31st into the city of Linkiang. The total number of bombs dropped during the two invasions was 140. How many were dropped in each invasion?
Source: Chi Tung-wei's Education for the Proletariat in Communist China, 1956, p. 46.