easy, one minutes i solve the problem
8 e! |* L& E# @+ t, \' ?4 G+ A' ndivide into half, mean 6/ 6
1 k( `& ^: {9 i% y: mtake the heavier 6 ping pong
; j& q: r9 G6 V) W% q8 T- Kdivide into 3/3, take the heavier 3
; B" S/ v& m6 a( k6 {5 z0 m( Ktake the the other 3 that have the equal weight, switch each to measure, the most important things is labeling the ping pong so that we can recognize |