[求助]新模考软件里的题，请大家帮忙看看，谢谢！！

赫连勃勃

以下是引用maggiehan在2006-1-2 1:06:00的发言：

偶相信你一定能考好的，到时别忘了多带回点JJ哦。

托你吉言

tomasy

祝赫连杀G好运. 新年快乐, 凯旋归来.

xue3y

1   If 500 is the multiple of 100 that is closest to X and 400 is the multiple of 100 that is closest to Y , which multiple of 100 is closest to X +Y

(1)    X 小于500

(2)    Y 小于 400

这题怎么看着这么胡涂呢？题目中问“which multiple of 100 is closest to X +Y”，不应该给出5个选项吗？怎么看着不象DS题呢？

tomasy

以下是引用xue3y在2006-1-3 2:47:00的发言：

1   If 500 is the multiple of 100 that is closest to X and 400 is the multiple of 100 that is closest to Y , which multiple of 100 is closest to X +Y

(1)    X 小于500

(2)    Y 小于 400

这题怎么看着这么胡涂呢？题目中问“which multiple of 100 is closest to X +Y”，不应该给出5个选项吗？怎么看着不象DS题呢？

X > 450, Y>350.

(1) 450< X <500

(2)350<Y<400

(1)+ (2) ===> X + Y 在800到900之间, 所以不确定.

xue3y

谢谢tomasy，一个月没做数学了，不知道是我的脑袋锈了，还是新模考软件的题太绕，这道题我想了好久才明白，过几天就考了，还这样，我哭。。。

maggiehan

楼上别担心，多做题就好了，偶也这个月考，现在也很怕数学。

maggiehan

再接着求助两道题吧.

A store purchase 20 coats that each cost an equal amount and then sold each of the 20 coats at a euqal price , what was the store's gross profit on the 20 coats ?

1).If the selling price per coat had been twice as much , the store's gross profit on the 20 coats would have been 2400

2) If the store selling price per coat had been $2 more ,the store's gross profit on the 20 coats would have been 440

这道题偶觉得应该是C， 可答案是B。 如果B对，那A也应该对阿！！

2。Which of the following lists the number of points at which a circle can intersect a triangle?

A. 2, 6 only

B. 2,4,6 only

C. 1,2,3,6 only

D. 1,2,3,4,6 only

E. 1,2,3,4,5,6.

这道题什么意思啊？？

hitlzc

以下是引用maggiehan在2006-1-4 22:38:00的发言：

再接着求助两道题吧.

A store purchase 20 coats that each cost an equal amount and then sold each of the 20 coats at a euqal price , what was the store's gross profit on the 20 coats ?

1).If the selling price per coat had been twice as much , the store's gross profit on the 20 coats would have been 2400

2) If the store selling price per coat had been $2 more ,the store's gross profit on the 20 coats would have been 440

这道题偶觉得应该是C， 可答案是B。 如果B对，那A也应该对阿！！

2。Which of the following lists the number of points at which a circle can intersect a triangle?

A. 2, 6 only

B. 2,4,6 only

C. 1,2,3,6 only

D. 1,2,3,4,6 only

E. 1,2,3,4,5,6.

这道题什么意思啊？？

1。设总价格为P,总成本为C,利润为P-C

1)2P-C=2400

2)P+2*20-C=440,可求出P-C=400

2.是否选E.

我觉得题意是说任一个圆和三角形可能的交点有几个。当然0-6都是有可能的，E虽然没说0，但没说only

xue3y

2。Which of the following lists the number of points at which a circle can intersect a triangle?

A. 2, 6 only

B. 2,4,6 only

C. 1,2,3,6 only

D. 1,2,3,4,6 only

E. 1,2,3,4,5,6.

我觉得这题选B，既然说intersect，那就应该排除相切的情况，所以只可能有2或4或6个交点。再讨论。。。

xue3y

谢谢maggiehan的鼓励，其实我不是怕数学，我是因为阅读不好，所以老是不能正确理解题意，导致会做的题也做不对。