Sorry everybody, I can't type simplified chinese here. I would like to share my experience here.
First question. 2/5 is multiples of 5, 3/20 is multiples of 6, 1/10 is multiples of both 5 and 6.
The integers list below is both multiples of 5 and 6 (whether not multiples neither).
The words in the (......) is not sure. the rest of the words is sure.
1.forget
2.2/7
3. 2/11
4.forget
5.forget
This question takes me 13 minutes to think about it. But I still don't know what it's asking.
Second question: "Mary was graduated from high school", she was among 78% in the (.....some school organization). " Mary graduated from high school", she was among 89% in the organization.
Which number listed below is acceptable.
1.10%
2.50%
3.70%
4.80%
5.90%
Third questions: x and y are integers, r and t are prime factors. ask if x/y=r/t.
1. x and y are even integers
2. x and y are both prime factors | 
