A fun math problem

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Comments

• Anonymous
  December 09, 2010
  Two minor observations: First: In the declaration   Decisions[Integers[0, 9], x1, x2, y1, y2], The range should be Integers[1, 9].  If 0 is included, this declaration alone could allow for one of the numbers x or y to be single-digit. Second: In the declaration   Decisions[Integers[10, 100], x, y], The range should be Integers[10, 99], as x and y are restricted to be two-digit integers. Of course, given the constraints of the problem, the first and second declarations will work together to ensure that the x and y numbers are only two-digit integers, but it doesn't hurt that the declarations be tighter. Bruno Repetto, PhD