easy, one minutes i solve the problem
% [1 o& C7 T( d5 {& `9 d5.39.217.77divide into half, mean 6/ 6
3 \# B3 G7 f8 U5 btake the heavier 6 ping pong
+ k' L$ W& a) W3 x1 a7 A/ l! u( Q5.39.217.77divide into 3/3, take the heavier 3
3 U/ o# t4 r% l+ v6 Y mtake 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 08:11 PM
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