CISRA Puzzle Competition 2007 - Hints

This is the archive of the 2007 Puzzle Competition. Please visit the current competition site for information about the latest Puzzle Competition.

C.2 Calculate

  • The puzzle would be the same without the parentheses - they are included solely for convenience.
  • Performing arithmetic calculations is the wrong approach. And yet, a calculator may come in very handy.
  • Numerical values are irrelevant; what's relevant is how the digits are drawn.