The number of stamps that kaye and albeto had were the ratio 5:3, respectively. After kaye gave alberto 10 of her stampes, the ration of the number kaye had to number alberto had was 7:5, as a result of this gift, kaye had how many more stamps than alberto?

20           30  40  60  90

答案给的是40，可是我算出来kaye有150，alberto有90，得出60。不知道自己是哪里出错了，难道真的是大脑出了问题，这么简单的计算都算不出来了？

lz漏看这句话了吧？as a result of this gift

你计算出k＝150，a＝90是对的啊，

（150-10）－（90+10）是不是就等于40了呢？：）

看题仔细咯：）加油！！