David0822

36) denote serial set S, that the Nth number of S is N个1.
B是S前40项之和, 问B的tens digit. (ans: 3)
-----------------------------
这个是旧机经，好象是7月的吧？
问题问的是在一个数列中的数字是这样表示的：1、11、111、1111、11111。。。。
问前40项的和中，十位数是什么。可以确认：3。
-----------------------------
各位数和: 1 * 40 = 40
十位数和: 10 * 39 = 390
40 + 390 = 430
确认：3
=============================
(103) 某CITY，卖了62%的新房和75%的老房子（分别为E和N）。如果“3 TIMES AS MANY E WAS SOLD AS N”，问卖了的房子占总房子的比例。
请注意“3 TIMES AS MANY E WAS SOLD AS N”的意思，是3N=E，还是N=3E。我搞了半天也不确定，如果错了，很冤。
[讨论] 我认为是3N=E; 则 (N+E)/(N/75%+E/62%)=64.8%
------------------------------------------------
[讨论] 我认为是 E=3N; 则 (N+E) / (N/75%+E/62%) ≒ 4 / (4/3 + 5)

David0822

(32) a retailer purchase product C as the same amount as product D, and sell them at a higher price. The selling price of C is higher than that of D.
问C的毛利比D的高多少
1） Selling price of C is 1.15 of that of D
2） The gross income of D is 某一具体数
My answer: E
我选C，不知对否？
设purchase分别为c,d,(c=d)，gross income分别为C,D,(C=1.15D)，C的毛利比D的高(C-c)-(D-d)=0.15D.
The gross income of D is 某一具体数, so 0.15D is 某一具体数
-----------------------
c=d 不确定  => 题目给的是 the same amount, not the same price

David0822

Jeannette 说的有道理，数学都错在粗心！

David0822

E = 3N
This school has twice as many students as my last one.
这所学校的学生是我上次就读那所学校的两倍。
资料来源：LONGMAN DICTIONARY OF CONTEMPORARY ENGLISH

[此贴子已经被作者于2002-11-20 22:44:44编辑过]