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磬ʵжʺ mathematical puzzlesѧ mathematics ĵطֻʵ硣
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ʵеѧѧǵѧɳṩһõκһоĵѿξͿʼͬ¡ʦѧдۣϵõͬнԵķΧͨƽӪġԵѧоֱĵɣõͬרҵϷһΪܶѧ֮ġѧߡȱԺΪ˼ϸѧǸģֻбһ֮ʱŻķƽʱòԻ쳵ѧ۵ƫƫûκѧʡ;ƫĻᣨ飩뿪ԽԽԶճΪ
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磬ʵжʺ mathematical puzzlesѧ mathematics ĵطֻʵ硣
mathematical puzzles mathematics źܴ˵ΡǣGeorge PlyaŲֻóѧҲд˿ڵѧСӣӵɻͬѧҡûĻ㲻ѧ֮пԭ-_-
ʵеѧѧǵѧɳṩһõκһоĵѿξͿʼͬ¡ʦѧдۣϵõͬнԵķΧͨƽӪġԵѧоֱĵɣõͬרҵϷһΪܶѧ֮ġѧߡȱԺΪ˼ϸѧǸģֻбһ֮ʱŻķƽʱòԻ쳵ѧ۵ƫƫûκѧʡ;ƫĻᣨ飩뿪ԽԽԶճΪ
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