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俄国大作家托尔斯泰曾设计了这样一道数学题:从前,有个农夫死后留下了一些牛,他在遗书中写道:“妻子分给全部牛的半数再加半头;长子分给剩下的牛
Tolstoy, a great Russian writer, once designed a math problem: After a farmer had left some cattle, he wrote in his suicide note: “The wife gives half to all the cows; Give the remaining cow