I hear that it’s very tough. But I’m from China and the secondary education is totally different between in China and in North America(I’m immigrating to Canada but I guess it’s similar in the US in education).

For example, I’ve seen a Maths college entrance exam paper of a college in Canada, and it was really easy, and I could get 100% correct. Does that mean I won’t have any problem in Maths prerequisite?

I know I’ll need English(I plan to take an adult high school course), Chemistry, and Biology, probably Physics as well.

Now I really want to know it, how tough are Chemistry, and Biology prequisites gonna be? I can’t find any college entrance exam paper on Chemistry and Biology. Since people say these’re tough and they spent sevral years to make it, then I think I should start now(I’m still in my mother country)

Can someone give me sevral examples of the TOUGHEST Chemistry and Biology prerequisite questions? Or examples of the test would be even better.

Thank you.
Can you compare the prerequisite tests with GRE? Which one is tougher? I do have some GRE samples. Thanks