<p>I am currently helping a fellow senior of mine who is studying for the SAT I Math section. Are there any useful formulas that I should tell him to remember? Like rates, sum of integers or anything of that nature? If anyone could help me compile a list I am sure it will also help many on this site as well.</p>
<p>Yeah, that would be very useful! Thanks</p>
<p>Gery</p>
<p>d=rt
Simple but important</p>
<p>distance = rate x time </p>
<p>I am assuming this is what the equation above is right?</p>
<p>Can anyone else think of useful equations that will help save time?</p>
<p>geom formulaes necessary, I always tend to disregard them, but infact, questions come directly to test whether u know how to find areas/volumes/surface areas, etc of geom figueres (cones, and all)</p>
<p>Pretty much anything he'll need is on the test. In the beginning of the math section it has a list of helpful formulas. I don't think I've ever used a formula that wasn't on there. Pythagorean is always important, and I can't recall if that is included, so make sure. Really, for most of the questions you don't need formulae. There are no questions requiring use of quadratice equations, even. I would reccomend really looking at the logic behind the math section. For almost everyquestion, there is a shortcut of some sort. If you can't find one in the question itself, look in the answer choices.</p>
<p>For example:
Calvin traveled from his home to work at an average speed of 32 miles per hour, then returned home along the same route at an average speed of 40 miles per hour. His car's RPM remained constant at 3000. If his total traveling time for the trip was 3 hours, how many minutes did it take Calvin to drive from his home to the other city?
A. 100
B. 90
C. 80
D. 72
E. 60</p>
<p>At first glance this problem may seem confusing. However it is quite simple if you look for the hidden shortcut. First, cut out the statement: His car's RPM remained constant at 3000. It has no bearing on the problem.<br>
Now look closely at the question. If Calvin drove slower to the city than home from the city, it would have taken him longer to get there, logically. Thus the answer must be more than half of three hours. Since half of 3 hours is 90 minutes, and only one choice is greater than 90, we can easily choose A as the correct answer.</p>
<p>Shortcuts such as these are extremely important to SAT Math IMO.</p>