OG中的新GRE數學題解析（3）
http://en.jybest.cn 新東方在線 2015-08-09 大 中 小
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1)If the dollar amount of sales at Store P was $800,000 for 2006, what was the dollar amount of sales at that store for 2008 ?
A $727,200
B $792,000
C $800,000
D $880,000
E $968,000
直接算，800000*(1+10%)*(1-10%)=792000，即B
2)At Store T, the dollar amount of sales for 2007 was what percent of the dollar amount of sales for 2008 ?
Give your answer to the nearest 0.1 percent.___________%
直接算，1/(1-8%)=108.7%(約等於)
3)Which of the following statements must be true?
Indicate all such statements.
A For 2008 the dollar amount of sales at Store R was greater than that at each of the other four stores.
B The dollar amount of sales at Store S for 2008 was 22 percent less than that for 2006.
C The dollar amount of sales at Store R for 2008 was more than 17 percent greater than that for 2006.
本題A選項一看到就可以排除了，涉及到兩個店的絕對量的比較，這個不確定，沒有告訴絕對值。B選項是把兩個增長的比例簡單地算術相加。肯定錯了。所以C肯定是對的了。。算一下也是的確是對的。。
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