1st trial - put 6 balls at each side .. take out the lighter 6 balls
) Y$ z8 E8 B% [! \+ p& l( A7 I2nd trial - put the heavier 6 balls by 3 balls at each side
3 L, Q9 {% I5 X+ F# Ylastly, take out the lighter 3 balls.... now left 3 balls..
% O, d/ `+ |' O1 z" I3 y: }3rd trial - put 1 ball on each side, left 1 ball on table. if both sides balance, the ball on table is the heaviest. if one side on the scale is heavier then it is the heaviest... |