The possibilities of Time Machine Physics

Ponderance

here's a problem, that i have sent a considerable amount of time thinking.

If Two investment companies, have "time machines" that can look into the future and so that they can view their present investment strategies accordingly, who will make more money in the future, if their future cannot be changed from what they see?

More Interesting Question

Here's a more interesting question.

Suppose, you had to take a test. This test could be anything, from factoring an 1024-bit RSA number, to a simple 8-bit addition or even the SAT.

Now, if you had a time machine, and if you go into the future, and find out that you did not get a perfect score on the test, given that you also find out all the correct answers on the test and if you are allowed to use the answer sheet in your test, what does that tell you about the test?

Does that mean that any error you make is not yours? Can computers/machines use 'time portals' to find creative solution to their problems?

Is supreme intelligence equivalent to a "perfect time machine" ?