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MAGIC SQUARE: Calculate A*B+C

The aim is to place the some numbers from the list (7, 8, 11, 20, 21, 24, 49, 59, 66, 67, 70) 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.

Correct answers: 0

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Benjamin Banneker

Born 9 Nov 1731; died 9 Oct 1806 at age 74. Black-American astronomer, inventor and mathematician, compiler of almanacs and one of the first important black American intellectuals who was the self-educated son of a freed slave. He was the first to record the arrival of the "seventeen-year locusts" or periodical cicadas. In 1753, Banneker built a wooden clock that kept accurate time even though he had only previously seen a sundial and a pocket watch. He calculated the clock's gear ratios and carved them with a pocket knife. In 1789, he successfully predicted an eclipse. He helped survey the site of Washington D.C. (1791-3). Banneker was also an early antislavery publicist who worked to improve the lot of black people in the U.S.«[Note: some sources give date of death as 25 Oct 1806]

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