easy, one minutes i solve the problem" g G3 u: R) ^( M3 O- O K
divide into half, mean 6/ 6
4 A7 L& P3 \' r0 g: @% ltake the heavier 6 ping pong
- U. }% W* I s( w! J {& j8 l: c: mtvb now,tvbnow,bttvbdivide into 3/3, take the heavier 3
7 ]/ Q+ R9 z) S% d3 n0 D% ftake 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 |
發表於 2009-2-8 04:58 PM
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