Log inUsernamePassword
Log me on automatically each visit    
Register
Register
Log in to check your private messages
Log in to check your private messages
Zaurus 中文论坛 Forum Index » 经典难题

This forum is locked: you cannot post, reply to, or edit topics.   This topic is locked: you cannot edit posts or make replies.
下周题目提前了
View previous topic :: View next topic  
Author Message
badog
论坛管理员


Joined: 01 Nov 2006
Posts: 1021

小企鹅: 6575

PostPosted: 2006-Nov-07 Tue, pm9:51 Reply with quote
 Post subject: 下周题目提前了

一个经理有三个女儿,三个女儿的年龄加起来等于13,三个女儿的年龄乘起来等于经理自己的年龄,有一个下属已知道经理的年龄,但仍不能确定经理三个女儿的年龄,这时经理说只有一个女儿的头发是黑的,然后这个下属就知道了经理三个女儿的年龄。请问三个女儿的年龄分别是多少?为什么?
Back to top
View user's profile Send private message Send e-mail
hlive



Joined: 06 Nov 2006
Posts: 8

小企鹅: 237

PostPosted: 2006-Nov-07 Tue, pm11:55 Reply with quote
 Post subject: 我不知道那句话,头发是黑的是什么意思

不知道这个题目中说的是不是中国人,中国人生下来头发就是黑的直到4、50岁
只有一个头发是黑的??那就是说至少有两个在40岁以上,可是年龄之和只有13,难道年龄有负数??
这是一个高中的数学问题,呵呵,高二的知识,重要不等式,可惜我的高中数学确实不怎么样
Back to top
View user's profile Send private message
hlive



Joined: 06 Nov 2006
Posts: 8

小企鹅: 237

PostPosted: 2006-Nov-08 Wed, am12:06 Reply with quote
 Post subject: 刚查过

胎儿5个月就长头发,呵呵
Back to top
View user's profile Send private message
hlive



Joined: 06 Nov 2006
Posts: 8

小企鹅: 237

PostPosted: 2006-Nov-08 Wed, am12:26 Reply with quote
 Post subject: 假设小孩刚出生1、2年内是不长头发的

1+1+10==13,1*1*10==10,经理年龄不合常识,如果他是大财团的后代,10岁就能当经理,但是10岁也生不出10岁的女儿,
1+2+10==13,1*2*10==20,经理20岁,不可能有10岁的女儿,否定。
2+2+9==13,2*2*9==36,经理36岁,25岁生第一个女儿,34岁生一对双胞胎
有可能
2+3+8==13,2*3*8==40,经理40岁,32岁生第一个女儿,37,38岁各生一个女儿(生了三次还是女儿,他是不是包生凤啊?37,38一年一个,他老婆受得了啊?)这个有点牵强,3岁有头发了,不成立
3+3+7==13,3*3*7==42,经理42岁,39岁生最后一对女儿,3岁有头发了,不成立
3+4+6==13,3*4*6==72,经理72岁,69岁生最后一个女儿 Rolling Eyes ,(世界纪录的保持者?)
再往后不可能了,
综上所述,经历有最有可能是36岁,女儿分别是2岁、2岁、9岁(如果他的女儿3岁还不长头发,或者小孩在娘胎里面就是有头发的,这个不成立,或者他们家时混血儿家庭,只有一个是黑头发,有这些情况的话,以上的都不成立)
Back to top
View user's profile Send private message
badog
论坛管理员


Joined: 01 Nov 2006
Posts: 1021

小企鹅: 6575

PostPosted: 2006-Nov-08 Wed, am12:47 Reply with quote
 Post subject:

天啦?如此作答,太快了吧
Back to top
View user's profile Send private message Send e-mail
hlive



Joined: 06 Nov 2006
Posts: 8

小企鹅: 237

PostPosted: 2006-Nov-08 Wed, pm9:37 Reply with quote
 Post subject: 呵呵

呵呵
Back to top
View user's profile Send private message
ryebread



Joined: 13 Nov 2006
Posts: 107

小企鹅: 1836

PostPosted: 2006-Nov-13 Mon, pm9:54 Reply with quote
 Post subject:

强,虽然还不知道正不正确
Back to top
View user's profile Send private message
Display posts from previous:     
This forum is locked: you cannot post, reply to, or edit topics.   This topic is locked: you cannot edit posts or make replies.    Zaurus 中文论坛 Forum Index » 经典难题 All times are GMT + 8 Hours
Page 1 of 1

 
Jump to:   
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum

[ 页面生成时间: 秒 ] :: [ 次查询 ] :: [ ]
Powered by phpBB © 2001, 2002 phpBB Group
iCGstation v1.0 Template By Ray © 2003, 2004 iOptional