Riddle Me This: Which One is Heavier?

Step 1: Divide the balls into three groups.

• Group 1: 3 balls
• Group 2: 3 balls
• Group 3: 2 balls

Step 2: First weighing.

• Place the 3 balls from Group 1 on one side of the scale and the 3 balls from Group 2 on the other side.

Outcome A: If the scale tips, the heavier ball is in the group on the heavier side.
Outcome B: If the scale balances, the heavier ball is in the remaining Group 3 (the 2 balls).

Step 3: Second weighing.

• If the heavier ball is in Group 1 or Group 2 (3 balls): Take any 2 balls from that group and place one on each side of the scale.
  • If the scale tips, the heavier ball is the one on the heavier side.
  • If the scale balances, the heavier ball is the one you didn’t place on the scale.
• If the heavier ball is in Group 3 (2 balls): Simply place one ball on each side of the scale.

The heavier ball will tip the scale.