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A difficult mathematics question
Foreword: Don’t ask me why I have time to do mathematics question instead of doing the assignment… Question: 9 coins is provided, 7 coins are real, and 2 coins are fake. 1 fake coin is hea… もっと →
RayRay's Report
A difficult mathematics question
RayRay wrote 2 years ago: Foreword: Don’t ask me why I have time to do mathematics question instead of doing the assignm … more →
數學題??IQ題??
RayRay wrote 2 years ago: 媽媽比兒子年長２１年， ６年後，媽媽的年齡是兒子的５倍， 問： 爸爸現在在那裏？？ 他在做甚麼？？ 知道答案的我真的很糟糕！！ … more →
First Post should post something about natural number "1" ♪
RayRay wrote 2 years ago: 1.Introduction: I read an interesting post in a forum few days ago. The topic is “Is 0.999… (a recur … more →
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