easy, one minutes i solve the problem
1 w# `( V; Q& w9 I: \# j7 q3 q) \% o, {divide into half, mean 6/ 6% d7 ~1 Z0 j y# h/ O: F9 T9 j) r
take the heavier 6 ping pong
/ I- A- M! y$ j+ h4 H, V9 [divide into 3/3, take the heavier 3tvb now,tvbnow,bttvb9 z5 S, c2 l5 D' w4 w% v0 g
take 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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