Journey to the Center of the Earth Hints

Which ball is odd, if it is still heavy on the Right?

  • 1 of 3: Your weighing was from the "light" left side (balls 1 & 2).  If the result is even, it's easy to guess which is the "unique" ball.  If not, you must choose between them by looking back at earlier weighings.
  • 2 of 3: If EVEN, the answer is 6 (because it was originally heavy on the 1st trial and stayed that way during the 2nd).
  • 3 of 3: If EITHER side is HEAVIER, pick the Light ball -- 1 or 2 (because it was always light)