Search found 273 matches
Is |x| = |y| ? (1) x - y = 6 (2) x + y = 0 let the given question to x^2 = y^2 it can be (x+y)(x-y) = 0 (actually I can't convinced that is right way...) option1) x-y=6, so x+y=0, x=y SUFFICIENT option2) x+y=0, so x-y=any number INSUFFICIENT but OA is B anyone help the process of solving? And one m...
- by Whitney Garner
Sun Oct 14, 2012 4:55 pm- Forum: Data Sufficiency
- Topic: Data Sufficient - absolute number
- Replies: 4
- Views: 1392
Is |x| = |y| ? (1) x - y = 6 (2) x + y = 0 let the given question to x^2 = y^2 it can be (x+y)(x-y) = 0 (actually I can't convinced that is right way...) option1) x-y=6, so x+y=0, x=y SUFFICIENT option2) x+y=0, so x-y=any number INSUFFICIENT but OA is B anyone help the process of solving? Hi Castor...
- by Whitney Garner
Sun Oct 14, 2012 4:54 pm- Forum: Data Sufficiency
- Topic: Data Sufficient - absolute number
- Replies: 4
- Views: 1392
Can someone please address why this problem doesn't require the Distance = Rate x Time formula? By that, I mean that the first step in the OG explanation is to multiply the Distance (3.25 miles) by the rate (8 mph) which yields the time it took Bob to run the first leg. I understand how to do the p...
- by Whitney Garner
Sun Oct 14, 2012 12:57 pm- Forum: Problem Solving
- Topic: OG 13 79
- Replies: 4
- Views: 3211
In the figure, equilateral triangle ABC is inscribed in a circle. If the length of arc ABC is 24, what is the diameter? A. 5 B. 8 C. 11 D. 15 E. 19 http://s8.postimage.org/y55uwu1ch/photo.jpg Hi Mjkourtis! Fun geometry problem, but I am going to assume that the question SHOULD say one of the follow...
- by Whitney Garner
Sat Oct 13, 2012 10:48 am- Forum: Problem Solving
- Topic: GMATPrep 1 Geometry Question
- Replies: 3
- Views: 1662
What is the hundredths digit of decimal z? (1) the tenths digit of 10z is 2. (1) the units digit of 1,000z is 2. Hi Mjkourtis! This is a fun question that might be easier to solve if we recognize one method of handling Digit questions. Rather than just try to imagine the number, I'm going to give i...
- by Whitney Garner
Sat Oct 13, 2012 10:36 am- Forum: Data Sufficiency
- Topic: GMATPrep 1- Digits
- Replies: 2
- Views: 1105
Each of the following equations has at least one solution EXCEPT –2^n = (–2)^(-n) 2^(-n) = (–2)^n 2^n = (–2)^(-n) (–2)^n = –2^n (–2)^(-n) = –2^(-n) OA A Hi das.ashmita! The best place to start is by re-writing the choices on your paper so we don't confuse the parenthesis: http://i12...
- by Whitney Garner
Sat Oct 13, 2012 10:21 am- Forum: Data Sufficiency
- Topic: Manhattan
- Replies: 2
- Views: 989
Anna and Mark are included in a group of 8 people. If 4 people are selected at random and without replacement from this group, what is the probability that Mark and not Anna will be selected? A. 1/7 B. 2/7 C. 3/7 D. 4/7 E. 5/7 OA:B Hi vivibcn! One way I like to solve these weird "constraint&qu...
- by Whitney Garner
Sat Oct 13, 2012 8:28 am- Forum: Problem Solving
- Topic: Probability: Mark and Anna
- Replies: 4
- Views: 1391
NC4=NC12=> Nhas to be 16 now rephrase the question what is the reminder when 16! is divided by 17 (16+1) Now 16 ! is a multiple of 16...When a multiple of 16 is divided by 17 than the reminder will be 16. why? now think what would your answer be if 16 was divided by 17. same applied here hence the ...
- by Whitney Garner
Wed Oct 10, 2012 1:41 pm- Forum: Problem Solving
- Topic: Combinatorics
- Replies: 4
- Views: 2013
In a certain apartment complex, 1/4 of the apartments have terraces. If 1/8 of the apartments, including 1/5 of those that have terraces, have skylights, what fraction of the apartments have neither terraces nor skylights? a. 17/20 b. 27/40 c. 13/40 d. 5/17 e. 1/8 Hi nidhis.1408! As soon as I see t...
- by Whitney Garner
Wed Oct 10, 2012 12:50 pm- Forum: Problem Solving
- Topic: apartment complex
- Replies: 2
- Views: 5190
Hi, I have a little confusion regarding Absolute values. In the question Statement#2 has absolute values on both the sides,So would it be correct if i say we get: x - 3 = 2x - 3 or -(x - 3) = -(2x - 3) Please correct me if i am wrong. kindly let me know if the correct answer to the question would b...
- by Whitney Garner
Tue Oct 09, 2012 1:45 pm- Forum: Data Sufficiency
- Topic: Is x > 0?
- Replies: 7
- Views: 2331
Donald plans to invest x dollars in a savings account that pays interest at an annual rate of 8% compounded quarterly. Approximately what amount is the minimum that Donald will need to invest to earn over $100 in interest within 6 months? A. $1500 B. $1750 C. $2000 D. $2500 E. $3000 If interest rat...
- by Whitney Garner
Tue Oct 09, 2012 11:21 am- Forum: Problem Solving
- Topic: Compound Interest
- Replies: 2
- Views: 1557
Hi Whit, First of all thankyou for the solution. But I am not able to understand (a) how did you come to know that this question requires knowledge of combinations with repetition and (b) is there any other alternate way to solve this apart from the following method ? Hi adthedaddy! Let me start wi...
- by Whitney Garner
Tue Oct 09, 2012 11:05 am- Forum: Problem Solving
- Topic: Combinatorics
- Replies: 5
- Views: 3001
Statement by Medical Residency Association president: Hi Katy! Let us know if there is anything specific that you have a question on for this passage, but we can start by going over the reading and the logic behind the choices together. TAB 1: "Statement by Medical Residency Association presid...
- by Whitney Garner
Tue Oct 09, 2012 10:59 am- Forum: GMAT Integrated Reasoning
- Topic: IR MSR
- Replies: 2
- Views: 3976
What is the total number of ways of selecting twenty balls from an infinite number of blue, green and yellow balls? 1. 3^20 2. 20^3 3. 231 4. 1771 OA -> 231 Hi adthedaddy! First I want to note that this is a fairly irregular question for the GMAT as it requires the knowledge of combinations WITH re...
- by Whitney Garner
Tue Oct 09, 2012 10:35 am- Forum: Problem Solving
- Topic: Combinatorics
- Replies: 5
- Views: 3001
I have a similar problem that I can't seem to make out correctly. Does anyone have any suggestions? Steve took a math test that consists of basic questions and advanced questions. A correct answer to the basic question will gain 1 point and a correct answer to advanced question will gain 2 points. ...
- by Whitney Garner
Tue Oct 09, 2012 9:59 am- Forum: Data Sufficiency
- Topic: scoops of ice cream - DS 55 from OG 11
- Replies: 13
- Views: 5862