做了PREP模考，有2道数学错题,脑抽了...想不明白，求教各位：）

paspas · 发表于 2010-5-22 11:52:09

做了PREP模考，有2道数学错题,脑抽了...想不明白，求教各位：）

1） If $10,000 is invested at x percent simple annual interest for n years, which of the following represents the total amount of interest, in dollars, that will be earned by this investment in the n?

=> 答案是 10,000n(x/100)

2) A manufacturer produced x percent more video cameras in 1994 than in 1993 and y percent more video cameras in 1995 than in 1994. If the manufacturer produced 1,000 video cameras in 1993, how many video cameras did the manufacturer produce in 1995?

(1) xy=20
(2) x+y+xy/100 =9.2

=> 答案是B...(我怎么觉得2个条件都需要啊？)

hujingqi00 · 发表于 2010-5-22 12:05:17

1,单利计算。simple annual interest
2,B，是对的啊。1995年，1000*（1+x)(1+y）

paspas · 发表于 2010-5-22 12:17:17

谢谢LS回复...

不过第2题，我还是脑抽，我想1000*(1+x+y+xy)不能通过x+y+xy/100得到啊

hujingqi00 · 发表于 2010-5-22 12:21:32

百分号。

paspas · 发表于 2010-5-22 12:24:38

哦~~~对了，我都把percent忘了：）太脑抽了。

谢谢！谢谢！

做了PREP模考，有2道数学错题,脑抽了...想不明白，求教各位：）

所属分类: GMAT考试

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