each side put 6 ping pong. 
% a  h" M6 n& k" s1 q6 L0 oThen select the side of 6 ping pong which is heavier and measure again with 3 + 3 
5 a! C- {! l+ T! s. U2 E8 g& A; `% k5.39.217.77:8898Then select the side of 3 ping pong which is heavier. 
$ J0 n6 r3 p9 H5 ]- x5.39.217.77:8898After tat use these 3 ping pong , put 1 on each side. If equal then the 3rd ping pong is the 1.5.39.217.77:8898( b" D" E  S# h4 T7 p0 H1 ]" L/ ^ 
If one side is heavier means the heavier side ping pong is the one |