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MAGIC SQUARE: Calculate A*B-C

The aim is to place the some numbers from the list (2, 3, 10, 20, 21, 28, 48, 49, 56, 67, 73) 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: 2

#brainteasers #math #magicsquare

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Elmer McCollum

Died 15 Nov 1967 at age 88 (born 3 Mar 1879).American biochemist who originated the letter system of naming vitamins. He discovered vitamins A, B and worked with others on vitamin D. He performed extensive research work in nutrition and growth. He was the first in the U.S. to establish a colony of white rats as laboratory animals to be the subject of his nutrition experiments. In the 1910's, he recognized that a healthy diet required certain fats, and he named the essential component "fat-soluble A," as distinct from another he named "water-soluble B." Although at first he thought each was a single compound, he later showed that they were in fact complexes. He researched how certain minerals were important as nutrients, including calcium, phosphorus, fluorine, manganese and zinc.«

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