Search found 28 matches
Coordinate Geometry
Hi guys,
Please help solve this question:
In the xy-plane, does the line with equation y=3x+2 contain the point (r,s)?
1) (3r+2-s)(4r+9-s)=0
2) (4r-6-s)(3r+2-s)=0
- by RSK
Sat Feb 18, 2012 8:42 pm- Forum: GMAT Math
- Topic: Coordinate Geometry
- Replies: 1
- Views: 2076
Algebra, Inequalities, Absolute Value
Hi guys,
Can someone plz help me solve this question?
Is √(x-3)^2 = 3-x?
1) x is not equal to 3
2) -x|x|>0
Thanks!
- by RSK
Sat Feb 18, 2012 8:37 pm- Forum: GMAT Math
- Topic: Algebra, Inequalities, Absolute Value
- Replies: 1
- Views: 1582
Standard Deviation
Hi guys, Can someone explain the rules of standard deviation and how to solve this question. Thanks! :) During an experiment, some water was removed from each of 6 water tanks. If the standard deviation of the volumes of water in the tanks at the beginning of the experiment was 10 gallons, what was ...
- by RSK
Sat Feb 18, 2012 8:08 pm- Forum: Data Sufficiency
- Topic: Standard Deviation
- Replies: 2
- Views: 1592
Probability+Combinatorics
Hi guys, Can someone tell me how to solve this question: A medical researcher must choose one of 14 patients to receive an experimental medicine called Progaine. The researcher must then choose one of the remaining 13 patients to receive another medicine, called Ropecia. Finally, the researcher admi...
- by RSK
Fri Jan 27, 2012 9:28 pm- Forum: Problem Solving
- Topic: Probability+Combinatorics
- Replies: 3
- Views: 920
I was doing In Action problems in the Manhatton Word Translations Guide. Question no. 10 on pg 113: 10. Matt gets a $1,000 commission on a big sale. This commission alone raises his average commission by $150. If Matt's new average commission is $400, how many sales has Matt made? I know how to solv...
- by RSK
Fri Jan 27, 2012 9:22 pm- Forum: Problem Solving
- Topic: Change the Mean Formula
- Replies: 8
- Views: 29747
Change the Mean Formula
Hi guys,
Does anyone know what the formula is for calculating a change in mean? Thanks!
- by RSK
Tue Jan 24, 2012 4:02 am- Forum: Problem Solving
- Topic: Change the Mean Formula
- Replies: 8
- Views: 29747
GMAT TestPrep Question
Hi guys, Can someone explain how to solve this question: For every positive even integer n, the function h(n) is defined to be the product of all the even integers from 2 to n inclusive. If 'p' is the smallest prime factor of h(100)+1, then 'p' is: A: Between 2 and 10 B: Between 10 and 20 C: Between...
- by RSK
Sun Jan 22, 2012 2:45 am- Forum: Problem Solving
- Topic: GMAT TestPrep Question
- Replies: 2
- Views: 1409
A=P(1+r/q)^(nq)
The above is correct because it allows us to calculate the amount even if the interest is compounded twice or thrice a year, etc.
A= amount accumulated after n years including the interest.
r = interest rate as a decimal
n = no. of years
q = no. of times it is compounded
- by RSK
Mon Jan 16, 2012 6:25 am- Forum: Problem Solving
- Topic: Compound Interest!
- Replies: 7
- Views: 2500
What is the correct formula? The formula posted by Shankar is different from yours and does not take into account whether the interest is compounded annually, biannually, etc.
LalaB wrote:it is a formula.u have to know it by heart.
principal amount*(1+r/n)^t
1000(1+0.056/1)^3
1000(1.056)^3
- by RSK
Mon Jan 16, 2012 5:59 am- Forum: Problem Solving
- Topic: Compound Interest!
- Replies: 7
- Views: 2500
Word Problem
Hi, For this question, I did not understand the question statement itself! A computer chip manufacturer expects the ratio of the no. of defective chips to the total no. of chips in all future shipments to equal the corresponding ratio for the shipments S1, S2, S3 and S4 combined, as shown in the tab...
- by RSK
Sun Jan 15, 2012 7:47 am- Forum: Problem Solving
- Topic: Word Problem
- Replies: 3
- Views: 1191
Compound Interest!
Hi guys, Can someone help me understand how this problem can be solved quickly? If $1000 was invested at an annual interest rate of 5.6% compunded annually, which of the following represents the amount the investment was worth after 3 years? 1000 (1.056)(3) 1000 (3+1.056) 1000 [1+3(0.056)] 1000 [1+(...
- by RSK
Sun Jan 15, 2012 7:37 am- Forum: Problem Solving
- Topic: Compound Interest!
- Replies: 7
- Views: 2500
- by RSK
Sun Jan 15, 2012 7:27 am- Forum: GMAT Math
- Topic: Need to improve Q score
- Replies: 4
- Views: 2197
Need to improve Q score
Hi guys, I recently gave the GMAT and scored pretty low on the Q (60th percentile). My Verbal score was in the 92 percentile. I just need help with the Q. I am going to retake in end Feb. Wondering which books/strategy to use to boost my score in the Q section. Previously I used the Princeton Review...
- by RSK
Mon Jan 02, 2012 4:14 am- Forum: GMAT Math
- Topic: Need to improve Q score
- Replies: 4
- Views: 2197