21 第 21 章

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    21第21章(第1/2页)
    第二十一章
    顾青云神色未变,仿佛没有听到那刺耳的话,他甚至还微微笑了一下,只是眼底并无半分笑意:“白兄此言差矣。《周礼·考工记》有云,‘知者创物,巧者述之守之,世谓之工。’百工之事,皆圣人之作也。治国平天下,既需明经义、知廉耻的‘上等人’,也需通晓天工、利济苍生的‘实干者’。白兄饱读诗书,莫非竟忘了先贤教诲,只学会了以门户高低论人?”
    顾青云语速平缓,引经据典,却字字如针,不仅将对方扣来的“下等人”帽子轻轻巧巧还了回去,更暗指其学问不精、心胸狭隘,枉读圣贤书。
    顾青云昨夜已从卢屹口中知晓白钰其人——出身尚可,极为刻苦,却天赋有限,常年被卢屹、顾凌云等天才压过一头,性子难免偏执激狭。
    白钰果然面红耳赤,被噎得一时说不出话来,手指着顾青云:“你……强词夺理!”
    周遭同窗见状,有人看热闹不嫌事大,起哄道:“口舌之争有什么意思?不如手底下见真章?白兄,顾公子,比试一番如何?”
    白钰果然被激,当即扬声道:“正有此意!顾青云,你可敢?”
    顾青云心下微叹,知今日若退让,不仅颜面扫地,更会让宁王觉得他不过是个虚张声势、投机取巧之辈。
    唯有应战。
    在卢屹担忧的目光中,顾青云平静抬眼:“白兄既有此雅兴,顾某奉陪便是。只是不知如何比法?”
    恰在此时,一位身着青袍、面容清癯的中年先生步入讲堂,正是今日讲授经算的徐先生。
    白钰见状,立刻道:“便比经算!请徐先生出题,你我当场解答,敢否?”
    顾青云闻言,心下先是愕然,随即泛起一丝极为古怪的情绪。他一个前世浸淫数学多年的理工博士,要与这古代的读书人比试……数学?
    这岂非是,欺人太甚?
    他面上却不露分毫,只从容一揖:“恭敬不如从命。”
    讲堂内霎时安静下来,所有目光都聚焦于讲台前的徐先生。徐先生抚须,目光在顾青云与白钰之间扫过,并无讶异之色,似是见惯了学子间的意气之争。
    “既如此,老夫便出题一试。”徐先生声音平和,却自带一股威严,“今有雉兔同笼,上有三十五头,下有九十四足。问雉兔各几何?”
    此题一出,堂内不少学子皆凝神思索,白钰更是立刻低头,以指蘸水,在案几上急速演算起来。此题乃经典难题,需巧设未知,反复推算,最是考验耐心与机变。
    然而,几乎在徐先生话音落下的瞬间,顾青云便已平静开口:“回先生,雉有二十三只,兔有一十二只。”
    满堂皆寂。
    白钰猛地抬头,手指还悬在半空,脸上计算的神情尚未褪去,便被难以置信的惊愕取代。他甚至尚未理清头绪,对方竟已报出答案?
    徐先生眼中闪过一丝极快的讶异,但很快便隐去,缓缓点头:“答案无误。顾学子,你是如何解得?”
    顾青云微微一揖,语气依旧平淡:“禀先生,可设雉为甲只,兔为乙只。据题意,头数方程为甲加乙共三十五,足数方程为两个甲加上四个乙,总共为九十四。将第一式乘以二,得二甲加二乙为七十,再与第二式相减,即可得二乙等于二十四,故乙为十二,兔有十二只。代入第一式,得甲为二十三,雉有二十三只。”
    现代最基础的方程式,x和y被他用甲、乙替代,换汤不换药而已。
    堂内学子大多听得云里雾里,只觉其法古怪却似乎有效。
    唯徐先生眼中精光一闪,却觉得他逻辑清晰,步骤严谨,自成体系。
    “此法倒是新颖别致,步骤简洁,直指要害。顾学子,此法师从何人?”
    “是家中一位西席先生所传,登不得大雅之堂,让先生见笑了。”顾青云谦逊道,心中却有些羞愧,自己也不过是站在后世数学大家的肩膀上,仗势欺人而已。
    白钰脸色由红转白,又由白转青,显然无法接受自己苦思未果的难题,对方竟能瞬间解出。他咬牙道:“不过是凑巧知晓一道偏题罢了!徐先生,还请再出一题!”
    徐先生看了白钰一眼,略一沉吟,道:“好。再听一题:今有物不知其数,三三数之剩二,五五数之剩三,七七数之剩二。问物几何?”
    此题更是刁钻,乃赫赫有名的“孙子问题”,非精通数术者难以速解。
    白钰闻言,眉头紧锁,立刻又沉浸于繁复的推算之中。
    然而,顾青云只是略作思索,便再次开口:“回先生,此数最小为二十三。”
    (本章未完,请点击下一页继续阅读)21第21章(第2/2页)
    这一次,连徐先生都微微动容。此题难度远超鸡兔同笼,他竟又能如此迅捷地答出?
    “哦?何以见得?”
   
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