well, I should have said no googling

來源: 392 於 2012-12-28 19:15:15 [] [博客] [舊帖] [給我悄悄話] 閱讀數 : (138 bytes)
回答: I actually "solved" it in less than 2min 由 rx300 於 2012-12-28 19:07:24

It is a question at my kids schools math club. The test includes 6 problems and they were given 30 minutes to solve.

 

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