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RE: Fun Science Riddle + 2 bonus harder riddles + prizes
That is correct.
Torque = force * lever arm (length)
force = mass (weight) * gravitational acceleration (constant)
When in balance the torque on both sides of the center of gravity is equal. When the lever arm (length) is different on both sides and the torque on both sides is equal then the mass must be different. The long arm has smaller mass, the shorter arm has a higher mass.