1、(PS) m*=3m when m is odd; m*=m/2 when m is even. 问 9* x 6* =?
这题答案给的是27,可是我怎么算都是81……汗(9 x 3 x 6x 1/2 =81)。。。
真的不知道错在哪里了。。。麻烦大家给看看,谢谢
2、(DS) 在一个event中,the ratio of the number of women to the number of children was 5 to 2; what is the number of man?
i. the ratio of the number of children to the number of men was 5 to 11;
ii. the number of women is less than 30
答案是C。 可是我不太明白,women. children. men. total number,没有一个是固定的数字,怎么能够确定men有多少呢?
谢谢大家帮忙了(鞠躬)
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1 我也觉得是81呀 奇怪
2 w:c=5:2
c:m=5:11
w:c:m=25:10:22
w less than 30, so we can conclude that w equals 25 and man =22
了解了~
谢谢解答啊~~
意思就是,women,men,children是三种咯。。
children就是不分性别的咯
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