2 scenarios for q2

来源: 泥佛 于 2012-04-12 11:01:15 [] [旧帖] [给我悄悄话] 阅读数 : (192 bytes)
回答: 数学题求救，先谢了 由 琼岛春荫 于 2012-04-12 07:10:10

1. 1st position (million-th) is one of the pairs

2. 1st position is NOT one of the pairs

from here, it's better to ask you son/daugher to practice for this one -- haha!!

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