ks2009
BB,
I feel like I have an ok grasp of math areas tested on the gmat: exponents, combinations, probability are still ify

I know the basics formulas although I need to figure how to apply while not taking too long on any one problem. I still make simple mistakes like forgetting the simple interest rate formula.
I look a GMAT Prep CAT this morning and got a 640: Q42 and V 36. I know I can def improve my Verbal so need to read the
MGMAT SC book this week.
Math has never been easy for me. I wouldn't say I hate math but know it's not how I naturally think. I am more right brained.
Suggestions on math basic review besides Kaplan? I am searching the forum for exponents and interest rate concept info.
It may only make it harder with time, but it is useful to do a quick answer check after the question - for example, if you calculated the percentage or something else. Also, often math answer choices will have a pattern to them, such as
A. 1.5%
B. 1.8%
C. 2.1 %
D. 15%
E. 18%
When I see something like this, my first guess is that other people who took this question when it was experimental and tried out, may have made a mistake by multiplying by 10 or dividing by 10. Not always but often the group that has the most answers will be the one you should aim for. However, what this gives you, is an idea what to check for - for example did you forget to multiply by 10? This usually saved me. On my real GMAT I found 2 mistakes during my routine answer check procedure, which got me really scared because I rarely found mistakes in my prep process. This tool/trick is something you should try after you are already comfortable with basics and other solution methods. This will catch a few obvious errors but will not solve the problems, so I would not spent more than 5 seconds on it per question.
About formulas. You do need to
memorize all formulas you are expected to know, but that's not enough - you must also memorize at least 1 problem in which you would use the formula, so that you can recreate that problem on the test and apply the formula to the question - it was not enough for me to just know the formula - I was getting confused about which item to plug into numerator and which into denominator. By memorize the problem, I mean memorize every word of the problem and solution so that you can recreate it in the middle of the night if I woke you up, not vaguely remember the problem. Kaplan math workbook had a good section at the back that I used - make sure you memorize every problem from the back of it.
It also is worth a few points on GMAT to know how percents and fractions translate into each other. For example, what is \(\frac{1}{12}\)? or 15%?