Stressfree

1   weight 6 ping pongs with another 6 ping pongs. see which side is heavier3 Q. w3 S) c: q$ L5 L
2   spilt the heavier side ping pongs in half and weight against each other% c1 a) g: _8 }$ j) P5 f- \
3   weiht either ping pongs one on one then you will know which is the heavy one.