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第一百零四章 咱们走着瞧(1 / 2)

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接过月饼的小呆瓜用眼角的余光瞟见小南瓜似乎要爆发了,忙从书包中拿出一本课后练习册来,对卓小雅道:

“小雅,我昨晚做题发现一个很有趣的题目,好像有几种可能,我们一起看看吧!”

“好啊,是什么题目,还能难倒你吗?”卓小雅打趣道。

“嗯,倒不难,就是觉得一起想会比较有意思!你看,就是这个。”小呆瓜翻开本子,将一道趣味练习题指给卓小雅看。

卓小雅将身子凑了过来,看题念道:“甲、乙、丙、丁4个人的姓名很有趣:甲的名是乙的姓,乙的名是丙的姓,丙的名是丁的姓,丁的名是甲的姓。又知,4个人的姓名只有柳、白、丁、杨4个字,没有人叫杨白,而姓丁的名是另外一个人的姓,此人的名又是名柳的人的姓,请你写出这四个人的姓名。”

读完题目,卓小雅笑了起来:“这个确实有趣,倒是不难,挺麻烦就是。”

“就是,确实不难,我昨天已经做出来了,就是想留给你试试看!”

小呆瓜说着,从笔盒种拿出一支笔来递给卓小雅。

卓小雅何曾有过这种待遇,忙接了过来,认真分析后将答案写出:丁白、白杨、杨柳、柳丁。

小呆瓜看了一眼,赞赏道:“确实就是这四个名字,你真聪明,这么快就能想出来,不过你是不是还忘了什么?”

“忘了什么?”卓小雅疑『惑』地又看了一眼自己写的答案,摇头道:“没有啊,就是这四个名字没错了!”

小呆瓜叹了口气:“这四个名字是没错,错的是答案还不完整,你得把这四个名字的四种排列都写出来才行,你看,应该是这样!”

小呆瓜说着将他的完整答案写了出来,分别是:

1、丁白、白杨、杨柳、柳丁;

2、柳丁、丁白、白杨、杨柳;

3、杨柳、柳丁、丁白、白杨;

4、白杨、杨柳、柳丁、丁白。

“我之所以把这个题留着给你做,就是发现你平时答题有个最大的『毛』病,就是不够细心,经常答不完整,这样其实很吃亏的,以后可要记住了。”小呆瓜向卓小雅叮嘱道。

卓小雅脸上一红,觉得小呆瓜平时观察可真仔细,自己在数学方面确实弱他许多,这粗心也是很大的原因之一,不过现在最让她头疼的不是这个,而是刚刚学到的追及问题,每次做的时候都让她一个头两个大。

想到这里,她突然记起自己正好有一个这方面的题不会,这个时候请教小呆瓜岂不刚刚好?

这时,本来打算把两个月饼通通砸到小呆瓜脸上的小南瓜,在看到小呆瓜和卓小雅一起分析作业这一幕后,竟然有些呆住了,手上的月饼也迟迟砸不下来。

她突然,有些羡慕起这种学习好的同学互相切磋的感觉。

在小南瓜发呆的时候,卓小雅已经把自己的难题亮给了小呆瓜,那是一道很典型的追及题:

甲乙二人分别从相距18千米的a村和b村同时向东而行,甲骑车每小时14千米,乙步行每小时走5千米。几小时后甲可以追上乙?

卓小雅有些不好意思地对小呆瓜说:“不知道为什么,我对这种题理解起来特别困难,即便有些能做对,但换一种方式出现我又不懂了,这道题也是,你要不给我讲讲吧!”

小呆瓜看到题目,『露』出一种十分自信的笑容来:“没问题,我就来好好给你讲一下,保证你以后遇到这种题就都会做了!”

小呆瓜之所以笑得这么灿烂,是因为他发现,之前在一边发呆的小南瓜似乎也在认真听了。他于是仔细分析道:

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