Search found 52 matches
Variables Problem
If n and y are positive integers and 450y= n^3, which of the following must be an integer? I. y / (3 * 2^2 * 5) II. y / (3^3 * 2 * 5) III. y / (3 * 2 * 5^2) ANSWER --> I Only Not sure why that is the answer though, The only thing I can come up with is that I allows me to take the cube root so that i...
- by vongdn
Wed Oct 06, 2010 7:49 pm- Forum: Problem Solving
- Topic: Variables Problem
- Replies: 1
- Views: 828
- by vongdn
Wed Oct 06, 2010 3:27 pm- Forum: GMAT Strategy
- Topic: GMAT in 1 Week and Freaking out
- Replies: 14
- Views: 2873
what u r missing is that u assumed that height of the triangles is same... 2(1/2 s h) = 1/2 S H S = 2 s h/H since the two triangles are similar... and the ratio of their areas is 1/2 then the ratio of their sides will be in the ratio 1/root(2) hence H= root(2) h therefore S = 2 s h/(root(2)h) = roo...
- by vongdn
Tue Oct 05, 2010 10:17 pm- Forum: Problem Solving
- Topic: Triangles Problem (geometry)
- Replies: 3
- Views: 986
5 Paragraph Essays for AWA
For the two essays required on the GMAT (analyze and argument and analyze an issue) I was planning on using the 5 Paragraph essay format that I learned in high school. Would that work, or is it too basic? I read some example essays and they sound a lot more advanced than mine. But I can't see myself...
- by vongdn
Tue Oct 05, 2010 9:49 pm- Forum: GMAT Essays (AWA)
- Topic: 5 Paragraph Essays for AWA
- Replies: 0
- Views: 1330
Triangles Problem (geometry)
This is a geometry problem so I will try my best to describe the figure shown. You have two triangles shown, both with equal interior angles x, y, and z. So the triangles are similar because they have the same angles. The left triangle is drawn as larger than the right triangle. The base of the smal...
- by vongdn
Tue Oct 05, 2010 9:31 pm- Forum: Problem Solving
- Topic: Triangles Problem (geometry)
- Replies: 3
- Views: 986
Interest Problem
Robin split a total of $24,000 between two investments, X and Y. If investment Y earns 7% simple annual interest, how much did Robin put into investment Y? (1) Each investment earns the same dollar amount of interest annually. (2) Investment X earns 5% simple annual interest. From the question I see...
- by vongdn
Tue Oct 05, 2010 9:23 pm- Forum: Data Sufficiency
- Topic: Interest Problem
- Replies: 1
- Views: 1182
Overlapping Sets Problem
3000 families live in a certain town. How many families who live in the town own neither a car nor a television set? (1) Of the families who live in the town, 2980 own a car. (2) Of the families who live in the town, 2970 own both a car and a television set. 1. P(no car) = 3000-2980 = 20 --> Insuffi...
- by vongdn
Tue Oct 05, 2010 9:16 pm- Forum: Data Sufficiency
- Topic: Overlapping Sets Problem
- Replies: 3
- Views: 2171
Number Comparison Problem
If N and P are integers, is P > 0 ? (1) N + 1 > 0 (2) NP > 0 I see that (1) is insufficient. Wouldn't (2) be sufficient though? Cause you would divide both sides of the statement by N and P > 0 right? Or is that wrong? The answer is that Both together is sufficient, but I don't see it.
- by vongdn
Tue Oct 05, 2010 9:03 pm- Forum: Data Sufficiency
- Topic: Number Comparison Problem
- Replies: 6
- Views: 1235
- by vongdn
Mon Oct 04, 2010 9:21 pm- Forum: GMAT Strategy
- Topic: GMAT in 1 Week and Freaking out
- Replies: 14
- Views: 2873
- by vongdn
Mon Oct 04, 2010 12:10 am- Forum: The Application Process
- Topic: Do I have a good chance?
- Replies: 2
- Views: 1265
3^x - 3^(x-1) = 162, then x(x-1) = ? How do I find x to solve the final question? 3^x-3^(x-1)=3*3^x-3^x=2*3^x=162=2*3^4 thus x=4 so 4*3=12 and about the question you poster later 2+2^1+...+2^8=? 2+2^1=2+2=4 =2^2 2^2+2^2=4+4=8=2^3 you do the same till 2^8+2^8=2^9 3^x - 3^(x-1) = 162, 3^X ( 1- 1/3) 3...
- by vongdn
Sat Oct 02, 2010 11:40 pm- Forum: Problem Solving
- Topic: Number Properties and Powers
- Replies: 7
- Views: 1337
2 + 2 + 2^2 + 2^3 + 2^4 + 2^5 + 2^6 + 2^7 + 2^8 = 2^2 + 2^2 + 2^3 + 2^4 + 2^5 + 2^6 + 2^7 + 2^8 = 2^3 + 2^3 + 2^4 + 2^5 + 2^6 + 2^7 + 2^8 and so on so forth... finally u will get 2^8 + 2^8 = 2^9 IMO A basically see how I have combined the underlined portions of the equation... and how the sum equal...
- by vongdn
Sat Oct 02, 2010 11:31 pm- Forum: Problem Solving
- Topic: Exponents
- Replies: 5
- Views: 1188
2 + 2 + 2^2 + 2^3 + 2^4 + 2^5 + 2^6 + 2^7 + 2^8 = 2^2 + 2^2 + 2^3 + 2^4 + 2^5 + 2^6 + 2^7 + 2^8 = 2^3 + 2^3 + 2^4 + 2^5 + 2^6 + 2^7 + 2^8 and so on so forth... finally u will get 2^8 + 2^8 = 2^9 IMO A basically see how I have combined the underlined portions of the equation... and how the sum equal...
- by vongdn
Sat Oct 02, 2010 11:13 pm- Forum: Problem Solving
- Topic: Exponents
- Replies: 5
- Views: 1188
What is the number of different committees of 4 people that can be selected from a group of 10 people? is that 10!/6!4! the answer? Yes, the answer is 210. But how did the factorials you selected relate to the information given in the problem? What was the rule for the solution? Thanks for the info.
- by vongdn
Sat Oct 02, 2010 11:11 pm- Forum: Problem Solving
- Topic: Possibility Problem
- Replies: 3
- Views: 1533
3^x - 3^(x-1) = 162, then x(x-1) = ? How do I find x to solve the final question? 3^x-3^(x-1)=3*3^x-3^x=2*3^x=162=2*3^4 thus x=4 so 4*3=12 and about the question you poster later 2+2^1+...+2^8=? 2+2^1=2+2=4 =2^2 2^2+2^2=4+4=8=2^3 you do the same till 2^8+2^8=2^9 Thanks for the reply, but I think th...
- by vongdn
Sat Oct 02, 2010 10:54 pm- Forum: Problem Solving
- Topic: Number Properties and Powers
- Replies: 7
- Views: 1337