Construct a subtracting magic square with the first sixteen whole numbers that shall be "associated" by _subtraction_. The constant is, of course, obtained by subtracting the first number from the second in line, the result from the third, and the result again from the fourth. Also construct a dividing magic square of the same order that shall be "associated" by _division_. The constant is obtained by dividing the second number in a line by the first, the third by the quotient, and the fourth by the next quotient.
407.--TWO NEW MAGIC SQUARES.
From Amusements in Mathematics by Henry Ernest Dudeney.
