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# MAGIC SQUARE: Calculate A+B+C

The aim is to place the some numbers from the list (3, 5, 6, 8, 10, 12, 24, 32, 35, 39, 51, 61) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A+B+C.
The first user who solved this task is Thinh Ddh.
#brainteasers #math #magicsquare
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### Microfilm camera

In 1931, a microfilm camera was patented by New York City banker, George L. McCarthy (U.S. No. 1,806,763). He developed the first practical commercial microfilm use in the 1920's and was issued a patent in 1925 for his Checkograph machine, designed to make permanent film copies of all bank records to deter fraud. That device used motion picture film and a conveyor belt to photograph checks before they were returned to bank customers. In 1928 Eastman Kodak bought his invention and began to market it with McCarthy as president of Kodak's Recordak Division. With a perfected 35mm microfilm camera, Recordak in 1935 expanded and began filming and publishing the New York Times on microfilm.«
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