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