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第四百一十一章 左慈的杀手锏

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忽然,徐庶面露喜色,惊呼道:“老祖,我会算,太简单了。”

“嗯?”左慈长寿眉一阵乱摆,道:“你怎么算?”

徐庶笑道:“太简单了,一个人一匹马依次算下去,马上就能得出结果,毕竟这腿的数量只有区区94条,若是有几万条,就真不好算了。”

“嗯?元直算出来了?”秦峰又震惊了。

而荀彧和田丰深深点头,齐道:“然也。”

左慈哈哈一笑,道:“好小子,那你算吧。”

徐庶就开始算了,“一个人两条腿,一匹马四条腿,这就是六条腿……。15个人,腿,15匹马,6o腿。这就是9o腿,还剩下四条,就是一匹马。”

徐庶大喜,道:“老祖,弟子算出来了,一共15个人,16匹马,哈哈,就是如此。”

“哎?”秦峰捂住了脸。

“哈哈……。”左慈哈哈大笑了起来,他要的就是这样的结果。他笑容一收,冷道:“徐元直,你真是丢了你师父司马徽的脸。”

“怎么,不对吗?”徐庶愣了。

荀彧和田丰一阵摇头,道:“元直,你兴奋过头了,忘记有先提条件的,一共有35个头,你这边腿的数量是够了,头不对。”

“这……。”徐庶脸红了。

其实,徐庶有这样的表现,是因为他很希望能够帮助主公快算出来,却是因此中了圈套。

秦峰宽慰道:“元直不必烦恼,主公知道你是为了主公,心乱了而已。”

左慈这道难题,属于“物不知其数”类型的,这个类型延伸出来了许多算数问题,最早出自一千六百年前古代数学名著《孙子算经》。有题目为:“今有物不知其数,三三数之二,五五数之三,七七数之二,问物几何?”

同时《孙子算经》里面还有和左慈类似的问题。

秦峰这才知道,原来早再一千八百年前,左慈这位老祖就开始研究这种问题了,比《孙子算经》早了二百年。没准《孙子算经》里的物不知其数,就是继承自左慈这里的。

左慈,不愧是东汉末年学术界老祖级的人物,鬼谷子一个级别的大师。

荀彧他们越算心越乱,越算不出来。往往符合了“头”的要求,符合不了腿的要求。这道题目看似简单,但内藏玄机。人和马的腿数不一样,寻常人根本就不知道怎么算。越是一个头,两条腿这么算,越是算不出来。

左慈当初偶得这个课题的时候,用了半天时间,才推算出35个头,94条腿这个十分恰当的问题。现在拿了出来,马上就难住了荀彧这些后起之秀中的佼楚。他嘿嘿一笑,道:“贫道也不小看你们,总是能够算出来的,但一年半载的,贫道也等不得。就以一炷香的时间,若是算不出来,就是我输。若是算不出来……。”

他看了秦峰一眼,道:“就是你输了。”

左慈自己都用了半日推算,却是只给秦峰一炷香的时间,显然是在为难秦峰。也不知什么时候,左慈手中多出一个香炉,又摸出来一根香。

谁知秦峰微微一笑,道:“一炷香的时间?太长了,根本用不了这么长的时间,本侯就能算出来。”

左慈哈哈笑道:“年轻人,不要自大呦。”他就摸出火捻子,开始点香,“你那三个宝贝军师加起来也算不出来,你还嫌弃一炷香时间长,一会有你小子哭的时候。”

左慈点香的时候,秦峰就捡起一根树枝,脚底一抹地面,清理出平整的一块地面,就开始验算了。

荀彧、田丰、徐庶、典韦、许褚都围了过去。只见秦峰下笔如有神,刷刷刷唰唰唰。

荀彧第一时间就蒙圈了,惊呼道:“主公,你画的难道是符咒?”

只见秦峰又是画出,又是画出y,还有阿拉伯数字的35,94。虽然荀彧他们乃是天下屈指可数的军师,但没有见过y,也没有见过阿拉伯数字,只以为秦峰在鬼画符。

“嗯,这是,这是y,这个35,写作35,读作三十五,这个94,写作94,读作九十四,明白了吧?”

35等于三十五,94等于九十四,荀彧他们直如同一年级的小朋友,有些懂了,但更多的是不懂。

“这是一种新的数字表达形式,比如一万九千八百七十六,笔画如此繁重。而写作19876,这就简单多了,就能够大批量的节省时间和精力,就能够将更多的精力,投入到验算中,而不是写字。”秦峰语重心长道。

“原来如此!”这无异于重新规划了《算经》一道,荀彧、田丰、徐庶三人震惊了。他们从而更加深刻的知道,他们主公的能力。

“主公真是圣人在世,所思所想无一不为天下开辟新的领域,文若佩服……。”

徐庶和田丰也是一起拜道。

这个时候,左慈已经点燃了香烛,“臭小子,这一次,定然让你失败,哈哈……。”他笑着,就将香插进了香炉里。8

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