## Some Things You Should Know Before You Begin

### Omitted PS Answer Choices

On many Problem Solving questions (ones that are normally multiple choice on the GMAT), I have chosen not to provide answer choices. This is an intentional decision. I have done this because:

- I believe that if you want to get a very high score on the math section, you need to learn to find the answers to Problem Solving questions on your own, without leaning on the provided answer choices as a crutch.
- Without answer choices, you are forced to try to come up with a way to answer the question.
- This encourages critical thinking, and it can make it clear to you that you need more practice in a given area.
- Of course, on some types of PS questions, answer choices are necessary. In those cases they will be provided.

### Omitted DS Answer Choices

I have also not chosen not to list the answer choices on all Data Sufficiency questions. This, too, is an intentional decision, with a more simple justification: you need to have the answer choices memorized. If you don't yet have them memorized, please see the Data Sufficiency section of the site.

### Text Instead Of Math Symbols

In order to make this product as straightforward as possible and to allow every question to be presentable in a text format, I've decided to take a few shortcuts with math terminology. Specifically, you will see the following:

- Use of the word "pi" to represent the Greek letter with the same pronunciation.
- Use of the caret ("^") to represent exponentiation. So, 2^3 means "2 to the third," or 2*2*2.
- Use of "root(x)" to represent the square root of x. So, root(4) means , "the square root of 4."