Journey to the Center of the Earth Hints

If they're even, which ball is different?

  • 1 of 2: If the trays are STILL even, your answer is obvious.  If one side weighs heavier, use a bit of reasoning.
  • 2 of 2: If still EVEN, your odd ball is the one you didn't weigh in the 3rd trial ... 4.

    If they are UNEVEN, the LIGHT ball is the "unique" one -- either 7 or 8.  (Why?  Because both 7 and 8 were on the Heavy side after the 1st trial.)