easy, one minutes i solve the problem5 ^7 G% R6 m! j$ ?6 `3 O. h/ X
divide into half, mean 6/ 6
4 f% y: C5 S; p3 xtake the heavier 6 ping pong6 j0 ?2 w9 I0 G. }8 ^8 U- K0 |
divide into 3/3, take the heavier 3
2 n& q4 |0 ], B) \) f1 e2 P- ntake 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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