Search found 22 matches
This may be basic but get a better grasp of when to guess on problems and move on quickly. That's the thing that helped me the most. Make sure you get easy problems right especially on quant.
- by dhlee922
Wed May 21, 2014 6:48 am- Forum: GMAT Strategy
- Topic: Breaking through the 700 barrier?
- Replies: 7
- Views: 2854
never mind, i figured it out, need to add Y to both sides, which in effect cancels and you get the answers as stated above why cant you say 1. D + F = Y 2. D = 12+F from formulat 2 above, F = D-12 then to get Fred plus Y years, F = D - 12 + Y D = Y - F from #1 F = Y - F -12 + Y F = 2Y -F - 12 2F = 2...
- by dhlee922
Sun Jan 19, 2014 2:20 pm- Forum: Problem Solving
- Topic: Fred age
- Replies: 4
- Views: 2965
Between 99 and 301 , there are 201 terms. So sum of 201 numbers is 201*202/2 = 201*101 ~ 201*100 ~ 20,000 So sum of odd numbers should be anything around half of it . What is wrong am i doing here ? i think i have some additional information, the n(n+1)/2 formula works when you start with 1. it doe...
- by dhlee922
Tue May 07, 2013 6:37 am- Forum: Problem Solving
- Topic: Sum of all the odd numbers
- Replies: 13
- Views: 14190
Between 99 and 301 , there are 201 terms. So sum of 201 numbers is 201*202/2 = 201*101 ~ 201*100 ~ 20,000 So sum of odd numbers should be anything around half of it . What is wrong am i doing here ? edit: actually, i believe my post below doesnt address your question there are 201 terms, but the or...
- by dhlee922
Tue May 07, 2013 6:19 am- Forum: Problem Solving
- Topic: Sum of all the odd numbers
- Replies: 13
- Views: 14190
- by dhlee922
Tue May 07, 2013 6:09 am- Forum: Problem Solving
- Topic: Sum of all the odd numbers
- Replies: 13
- Views: 14190
For any positive integer n, the sum of the first n positive integers equals n(n+1)/2. What is the sum of all the ODD integers between 99 and 301, inclusive? A) 10100 B) 20200 C) 20400 D) 40200 E) 45150 OA will be posted in next 1 hour. Looking for the most efficient way of doing this. I've added th...
- by dhlee922
Mon May 06, 2013 6:39 pm- Forum: Problem Solving
- Topic: Sum of all the odd numbers
- Replies: 13
- Views: 14190
question about perpendicular bisector
if you are told that there are 2 lines and one is the perpendicular bisector of the other, could you set the 2 lines equal to each other and solve for x and y and that would give you your midpoint? y=mx+b y= (-1/m)x+b mx+b = (-1/m)x+b is this basically saying this is where the lines intersect, there...
- by dhlee922
Sun Mar 24, 2013 11:29 am- Forum: GMAT Math
- Topic: question about perpendicular bisector
- Replies: 2
- Views: 2564
hi, i have a follow up question regarding absolute values when is |x-4| equal to 4-x? so i start with 2 equations, first one is: x-4 = 4-x 2x = 8 x = 4 then 2nd equation i have: -(x-4) = 4-x -x+4 = 4-x these 2 equations are equal, so i thought you would have only one solution, but the book says the ...
- by dhlee922
Tue Mar 12, 2013 3:28 pm- Forum: GMAT Math
- Topic: how to solve absolute values and absolute value inequalities
- Replies: 12
- Views: 6577
rkav, i meant the parenthese to equal a negative sign, i think that's where your confusion is coming from
- by dhlee922
Tue Mar 12, 2013 2:01 pm- Forum: GMAT Math
- Topic: how to solve absolute values and absolute value inequalities
- Replies: 12
- Views: 6577
anyone have suggestions on the question i posted below? thanks, these error logs are great. how do you suggest i go about entering the data? should i spend 2 minutes on each question and only enter my answer and time, and move onto the next question, then when reviewing the answers i should make the...
- by dhlee922
Tue Mar 12, 2013 1:59 pm- Forum: GMAT Strategy
- Topic: GMAT Practice Grid - Use this to analyze your errors
- Replies: 79
- Views: 172946
2.a. y + 14 = -2 y = -16 2.b. since the value inside the absolute value brackets can be negative, i mutliply everything within the absolute value brackets by negative 1 -y - 14 = 2 ... i know that 2.a. and 2.b. actually are equal to each other, but is one way the correct way of doing absolute value...
- by dhlee922
Fri Mar 08, 2013 8:45 am- Forum: GMAT Math
- Topic: how to solve absolute values and absolute value inequalities
- Replies: 12
- Views: 6577
how to solve absolute values and absolute value inequalities
in the book that i'm using, i feel that they dont explain how to solve absolute value equations very well, so i'd like confirmation from an instructor to make sure i'm doing it correctly and that i have covered all scenarios 22 - |y+14| = 20 i first solve to get the inequality as the only thing on o...
- by dhlee922
Thu Mar 07, 2013 4:29 pm- Forum: GMAT Math
- Topic: how to solve absolute values and absolute value inequalities
- Replies: 12
- Views: 6577
thanks hemant and brian. i do understand why 3 is wrong sort of. if a-b=c what's the algebraic rule that a-b has to be treated as 1 term. if i'm squaring everything, why does it matter? also, if method 1 is wrong, how come the y squared raised to the 1/2, why doesnt the square cancel out the root? t...
- by dhlee922
Thu Mar 07, 2013 3:24 pm- Forum: GMAT Math
- Topic: problem solving question - roots and exponents
- Replies: 3
- Views: 1582
in addition to this, i have the kaplan premier 2011, havent used it yet (yes i know i'm slacking) my question is, are the practice problems and CATs that much different from the 2013 version? should i bother getting the 2013 version? excluding the fact that integrated reasoning is probably on 2013 a...
- by dhlee922
Thu Mar 07, 2013 11:27 am- Forum: The 60-Day GMAT Study Guide
- Topic: Kaplan Premier 2011 vs. Kaplan Premier 2012
- Replies: 2
- Views: 2078
problem solving question - roots and exponents
hi, i have a question regarding what is the correct way of doing this problem given that 5 - (y^2)^(1/2) = -3, what is x? the y term is actually squared and underneath a radical sign. i thought you could solve it as: 5 - y = -3 y = 8 i thought that the y^2^(1/2) would cancel each other out, but the ...
- by dhlee922
Sun Feb 24, 2013 12:28 pm- Forum: GMAT Math
- Topic: problem solving question - roots and exponents
- Replies: 3
- Views: 1582