Answer: Weigh a group of 3 balls against another group of 3, then you'll know which group of 3 contains the heavy ball. Pick 2 balls from that group and weigh one against the other.
Answer: The horse operates a mill and travels in a circular clockwise direction. The two outside legs will travel a greater distance than the two inside legs.
Solution:
Show Answer
The horse operates a mill and travels in a circular clockwise direction. The two outside legs will travel a greater distance than the two inside legs.