1)There are 10 sections on the SAT test. First section is always essay and last section is always improving sentence. You can go back to questions within a section but you cannot go back to questions on a previous section.

2) One of the section on the SAT is experimental, so it is not counted. But you don’t know which one.

3) There is a penalty for wrong answer. 1/4 point is deducted for every wrong answer. There is no penalty for Grid in questions in the math section.