Sat math help

Test Preparation
1

<p>I have problems with few math type problems:</p>

<p>1) The questions with unknown variable (x,y,z)..... is there some trick to solving those... (something other than plugging numbers in. Example: If there are b boxes in c crates then how many boxes are there in one crate.</p>

<p>2) The question with sets..... are there any shortcuts or methods for solving those???? Example: There are 12 students that take English and math. There are 5 students that take english and physics. There are 2 students that take math and phyisics. There are 20 students in the class. How many students take all three subjects.</p>

<p>3) The questions that ask intersection points and imaginary situations... I am just not able to get them right. Is there some way to improve on those problems.</p>

<p>I have good dr. Chungs and bb, online course and tests. </p>

<p>Any suggestions or tricks or resources.</p>

<p>Thnx in advance</p>

2

<p>For (1) and (3) pick 2 or 3 questions with which you’re having difficulty and post them. It’s difficult to provide you guidance without concrete examples to work with.</p>

<p>The traditional way to solve set problems, such as in (2), is to “visualize” them using venn diagrams. Do a search on the web to get an introduction to what these are. For example: [Venn</a> Diagrams & Set Notation](<a href=“http://www.purplemath.com/modules/venndiag2.htm]Venn”>Venn Diagrams: Set Notation | Purplemath)</p>

<p>For your example draw three intersecting circle – one representing English, a second Math, and a third Physics. We are looking for the region where the three circles overlap. The region where the English and Math circles overlap consists of 12, that where English and Physics overlap consists of 5, and that where Math and Physics overlap consists of 2.</p>

<p>The statement of the problem is not complete. If we assume that all students take at least two of the three courses, then the answer is 1 (12 + 5 + 2 = 19). However this isn’t stated so we can’t answer the question with the information given.</p>

<p>I hope this helps. Post a complete problem and I’m sure you’ll get additional help on the CC board.</p>

3

<p>on the number line the distance between point whose coordinate is a and the point whose coordinate is b is more than 100. Which of the following must be true:</p>

<p>I a-b> 100
II la-bl>100
III lal * lbl>100</p>

<p>answer is only I.</p>

<p>I can solve the problem… but with a shortage of time and stuff… I am not able to solve this kind of problem.</p>

<p>lal * lbl</p>

<p>a=100
b=0
The third one does not work.</p>

<p>a-b> 100</p>

<p>a=0
b=100’</p>

<p>0-100<100</p>

<p>Is there something that I can do???</p>