Q21:
A toy store’s gross profit on a computer game was 10 percent of the cost of the game.If the store increased the selling price of the game from $44 to $46 and the cost of the game remained the same, then the store’s gross profit on the game after the price increase was what percent of the cost of the game?
A.10.5%
B.11%
C.12.5%
D.13%
E.15%（答案是E，我怎么觉得缺数字啊）
Q22:
Four extra-large sandwiches of exactly the same size were ordered for m students, where m > 4.Three of the sandwiches were evenly divided among the students.Since 4 students did not want any of the fourth sandwich, it was evenly divided among the remaining students.If Carol ate one piece from each of the four sandwiches, the amount of sandwich that she ate would be what fraction of a whole extra-large sandwich? 答案是（4m-12）/(m(m-4))完全不知道是怎么来的，请人指导一下～谢谢啦作者: yoyo9012 时间: 2010-7-18 07:24
第一题 设成本x, 那么利润就为0.1x,销售价就是1.1x，从“the store increased the selling price of the game from $44 to $46”得出1.1x=44 ,x=40
由于成本不变，增加后的利润为46-40=6，根据问题解得6/40=0.15 即E
