12月8号上海一战760，机经

barbiedolly

又想起来一个嘻嘻

一个数列中第Ｎ个数是这样子的：它有n digits, and each digit is 1。问前40个数的和的十位数是多少？

解法：前十个数从1,11,111,一直到1111111111.加起来，最后三位为９００。接下来十个数最后为１１０，接下来的都是110

so 110*3+900=十位数为３的一个数．

答案是３

won872

Thank you!

gflvyy

４。4个不相同的且大于２的整数的product is less than 500，then what is the possible greatest number among them?

4个不相同的整数是连续的么？

楼主的issue 在题库中没找到阿，请指点。

[此贴子已经被作者于2008-12-9 2:54:01编辑过]

Gillianwei

楼主好人！感谢

yiwenliu

I think the prossible sandwich for adding Ham should be 3(letters)*3(cheeses)*2(wasabi)*2(XX)=36 instead of 24, because for adding the ham, you can choose cheese A , chesse B or no chesse.The rest for adding beef and pork should be the same. So the total should be 60.

Am I right? Please share your idea.

Thanks!

Yvonne

barbiedolly

以下是引用yiwenliu在2008-12-9 2:55:00的发言：

I think the prossible sandwich for adding Ham should be 3(letters)*3(cheeses)*2(wasabi)*2(XX)=36 instead of 24, because for adding the ham, you can choose cheese A , chesse B or no chesse.The rest for adding beef and pork should be the same. So the total should be 60.

Am I right? Please share your idea.

Thanks!

Yvonne

for adding the ham, you must add one kind of cheese.原题的要求

满街找甜筒

看到"又想起来一个"的时候我就想拥抱LZMM...

哈哈哈

barbiedolly

以下是引用gflvyy在2008-12-9 0:41:00的发言：

４。4个不相同的且大于２的整数的product is less than 500，then what is the possible greatest number among them?

4个不相同的整数是连续的么？

楼主的issue 在题库中没找到阿，请指点。

题目没说明连续.

不过,要找出四者中最大的,必须使其它三个尽量小.因为四个数不相同,所以最小的三个只能是,3,4,5

barbiedolly

issue在题库里确实有的啊..

我这个版本是第111题.原题如下:

"The most effective business leaders are those who maintain the highest ethical standards."

大家再努力找找吧,反正我这个黄金80里面有的.

hero05

to LZ: 谢谢，把新想起来的题目也编辑到你这帖子的一楼去吧，免得jj整理人找遗漏了