infinityzero

http://i41.photobucket.com/albums/e289/infinity10/b03cc1fc.jpg 30. x and y are positive integers and x > y. Col A: (x^2)/(y^3) Col B: (y^3) / (x^2) OA is C, but I chose D. Can someone explain? For #29 especially, what is a fast way to solve these types of questions?Thanks.

http://i41.photobucket.com/albums/e289/infinity10/7ef9f115.jpg How do you solve this? Thanks.

I hadn't used 0 at all since it asks for a negative or positive number. But based on your fact, you can rule out using 0 and test other numbers to get to the answer.

#4. Yes, sorry for the error. Guess I thought too fast. That is true. If v is positive we is subtracted from v, then it will be like saying v - (-we) = v + we = positive answer #3, sorry I misunderstood. Thought your symbols meant that 9 * 1/3 = 3, which is why I had reduced them, but it is actually 9*1/3 or 28/3. From 4 to 12, is a total of 9 numbers (12-4 = 8 + 1 = 9). n will lie somewhere between 4 and 12. Then, they say that n = 2 times as far from 4 as from 12, which I'm going to interpret as a 2:1 ratio, which is a total of 3 (2+1). Then, n would have to include a factor of 1/3 into its answer. Answer: 9*1/3

Yes, these are the questions that had given me trouble because I hadn't agreed with the OA, so needed explanations. Suffice to say, some of your answers are like mine while some others have cleared up my confusion. Thanks!

Hi, Thanks. For #2, my bridge was that something moderate will not show intensity and I picked A, something extenuate will not show seriousness. Actually, OA is C which is an error I think. A few more 1. PRODIGY: PERSON A. pagan: iconoclast B. beacon: shadow C. maniac: obsession D. traitor: confidence E. miracle: occurrence 2. MOIST: SODDEN A. warm: inviting B. surprised: astonished C. magical: sentimental D. hopeless: bereft E. soft: euphonious 3. DOSE:MEDICINE A. current: river B. electricity: shock C. tremor: earthquake D. sentence: punishment E. tempo:music 4. DINGY: GLISTEN A. slippery: adhere B. coarse: polish C. sharp: hone D. shallow: overflow E. savory: taste Which is better, A or D?

Thank you. One question for #2, how did you get C? Even if you add the sums out, you get E = 420 and K = 400 Col A: E - K = 20 Col B: 40 What am I doing wrong?:hmm:

Area of sector: (n/360)*pi*r^2 Area of arc: (n/360)*2*pi*r ...because the arc is the measurement of the outer part of the circle, you are in a way looking for a part of the circumference 3)If n is the number on the number line between 4 and 12 thats is twics as far from 4 as from 12 then n is 6*(2/3) 8 9*(1/3) 10*(1/2) 11*(1/4) I got 8 by plugging in choices. First reduce the answers down to make it easier. Then plug in numbers. Eliminate A, C, and E, because they are less than 4. You're left with B and D. I got 8 because n is 2 times as far as 4. Is this correct? I'm wondering how to write "as from" into a math equation. 4)if we is a negative integer and v is positive integer ,which of the following must be true I wv is negavtive integer II w-v is a positive integer III v-w is a positive integer I only II only III only I and III I,II and III I got "I only" because you don't know how big we is or how small v can be.

Can someone explain how they got the answers for these? Thanks. 1. EXCULPATORY: ABSOLVE A. motivational: stir B. conventional: resist C. rhetorical: speak D. pedantic: learn E. ponderous: choose 2. MODERATE: INTENSITY A. extenuate: seriousness B. separate: distance C. indulge:chaos D. commemorate:memorial E. disparage: animosity ACCUMULATION: A. severance B. dissipation C. reciprocity D. absolution E. renumeration I picked B, but answer is D. Can someone explain? Thanks.

1. Col A: (1/m) + (1/n) Col B: (m+n)/mn I said ans D because the question didn't have any conditions so m and n can be integers, fractions, positive, negative, even equal to each other. But OA was C. Can someone explain? 2. E is the sum of the first 40 positive even integers K is the sum of the first 40 positive odd integers Col A: E - K Col B: 40 What is a quick way of doing this? I added very quickly and got B as my answer, but OA says A. Maybe a typo? 3. According to a newspaper article about employment in Country J, 30.2 million workers, or 20.9% of the labor force of Country J, were union members. Which of the following equals the number of workers in millions in the labor force of Country J? A. (30.2)(20.9) B. (30.2)(0.209) C. 20.9 / 0.302 D. 30.2 / 20.9 E. 30.2 / 0.209 What is the equation for this? 4. Which of the following CANNOT be expressed as the product of exactly 2 consective integers? A. (2) (3) (7) B. (2) (3) (7) (11) C. (2) (5^2) (13) D. (2^2) (3) (5) (7) E. (3^2) (11) (13) I don't understand what this question is asking, nor the answer choices. Can someone explain? Thanks.

Actually, for graph questions, I always draw the graph on the paper. However, this still does not answer my question. If you make up points for a and b, say where a = 2, and b = 2, then you will get 2 more points 2a = 4 2b = 4 4a= 8 So all the points would be (2,2), (4,4), (8,2). When you plot them, you get a regular triangle where any of the 3 sides could act as a base. Then, you will also get 3 different heights. So, how can you get a definitive base and height from this type of question?

Ok, makes sense now. Thanks!

The questions I've been posting have been from Real10 korean tests, this one being the 10.6 test.

BAIT A. perplex B. disarm C. delude D. release E. fortify The general definition of bait is to lure or entire, to harass someone or something. I picked B, with the idea that when you disarm, then you don't have anything that will be enticing or luring to another. But the answer is E. Can someone explain? Fortify means to build up, to make stronger. I don't understand how this is the antonym of bait. Thanks.

Here is another one that I need help with: Far from undermining the impression of permanent decline, the ___ statue seemed emblematic of its ____ surroundings. A. indecorous...opulent B. grandoise...ramshackle C. pretentious...simple D. ungainly...elegant E. tawdry...blighted

Well, my thinking is that a dancer perform in a ballet, but a dancer can also perform other things. E doesn't give a very strong relationship to me. Neither does A. An author can write a drama, but this doesn't necessarily have to be all the time. I eliminated A and E, and picked D . But OA says it is A. I can't find a GOOD relationship between author and drama, and when I do, I would eliminate both A and E because they have a similar relationship. For #2, I understood now..hadn't known there was another meaning to rustling when I did it. Here is another one that I need help with. Can someone make a good bridge for this: OFFICIOUS: MEDDLE A. disaffected:rebel B. bustling:excel C. profligate:conserve D. subservient:esteem E: acrimonious:soothe What is a good bridge for this? Thanks.

Hi, For #1, I did check negative values, but end up getting answer C. First let's say x = -3. Then column A is -|3| = -3 (because the negative sign inside the absolute value will make x positive), & column B is -(3) = -3...this led me to C. If x = 3, then column A is -|-3| = -3 & column B is -(3) = -3. Again they are the same. Can someone explain what I am doing wrong? For #2, I do not understand. Your answer is correct, but how did you get there? The conditions are -2 "soln2> its a square, with corners at (2,2), ( -2,2) , (-2,-2) , ( 2,-2)" Understood #3. I had picked D, but hadn't taken that extra pole into consideration. Understood #12. They don't give describe conditions on OP or OQ, expect what's in the diagram. I tested a few numbers anyway. Say the radius of OQ = 4. The radius of OP is less than that, so say that is 3. The area of OP = 9pi and the area of the sector is 4pi (16pi/4), so A would be bigger. If you take fractions, say OQ = 1/2 and OP = 1/4. Then the area of the small circle is pi/16 and the area of the sector is (1/2)^2 = (1/4)*1/4 = pi/16. The answer here is C.....so final answer is D. For #14, how is the answer B?? They don't define any conditions, simply give a number line with variables on it, nor origin of location. I do not understand this one at all, it may be a typo. For #29, "the question asks for prob of atmost 40 feet i.e all the 40 feet included i.e the point can be less than 40 ft but not greater . " Well, the question asked for "at most 50 feet apart". I think your equation would still be the same though. What do you think?

1. x # 0 Col A: -|-x| Col B: -(x) 2. In a rectangular coodinate system, the set of all points (x, y) such that -2 A. 2 perpendicular line segments B. 2 parallel line segments C. a circular region D. a triangular region E. a square region 3. On a highway there is an electric pole every 96 feel. If the poles am numbered consecutively, what is the number of the pole 2 miles past pole number 56 ? (1 mile = 5,280 feet) (A) 109 (B) 110 © 152 (D) 165 (E) 166 For #12 below, I picked A, but the answer is C. How? For #14, I picked D, but the answer is B. How, especially since the problem doesn't define where the variables fall on the number line? And how do you solve #29 below? OA says it's D. http://www.geocities.com/juliet_rain77/gre10.6q12.jpg http://www.geocities.com/juliet_rain77/gre10.6q14.jpg http://www.geocities.com/juliet_rain77/gre10.6q29.jpg Ans: DEECBD

Can someone make good bridges for these two? Thanks. 1. INSTRUMENTALIST: SYMPHONY:: A. author: drama B. photographer: cinema C: composer: concerto D. artist: painting E. dancer: ballet PLAGIARISM: IDEAS:: A. libel: words B. forgery: documents C. arson: buildings D: kidnapping: ransom E. rustling:cattle Ans: AE

"1) In the figure ( a big square is there and then there is a small square inside it ) if the area of the larger square region is twice the area of the smaller square region & if a diagonal of the smaller square has a length of 1 foot,then a side of the larger square is how many feet longer than a side of the smaller square ? (A) 2-sqrt2/2 (B) sqrt(2-1) © 1 (D) sqrt2 (E) 2" I got Ans A: Al = Area of large sq As = Area of small sq Al = 2*As Then, the diag of the small sq is 1, so by Pythag theorem a^2 + b^2 = c^2. But, this is a square so the sides are equal. Then, a^2 = b^2, because a = b. Then, the length of the side of the small square is: 1 = 2a^2 (since a=b, then a^2 = b^2, so you can do this). Then a = 1/(sqrt 2) = sqrt 2 / 2 As = (sqrt 2 / 2)^2 = 1/2 Al = 2(1/2) = 1 One side of large square = 1 To answer the question: 1- (sqrt 2/2) = 2 - sqrt 2 / 2 . You can reduce this to 1 - (sqrt 2 / 2), but there isn't much point since this isn't one of the answer choices. 2) S is the set of all integers from 1 to 48 ,inclusive V is the sum of all even integers in S D is the sum of all odd integers in S A : V B: D+23 " Is the answer B? If you're adding a number as large as 23 to D, it would surely become bigger than V, even if V>D initially. Anyway, in this problem, you have numbers 1-48, so you have 48 numbers total. You don't NEED to find the sums, so a quicker way to do this is use a smaller sample set. Say S is instead a set of all integers from 1-6, where V is the sum of the even integers and D is the sum of all the odd integers. Then, V = 2+4+6 = 12 & D = 1+3+5 = 9 Then V>D. But, if you're adding 23 to D (9+23) then the answer will always be B, especially since everything is positive. Relating that back to a larger set (like in this question), implies the answer is still B. Please correct me if I'm wrong. There has to be a faster way of doing this.

You are right for #2. Thanks. For #1, I kept getting confused on altitude, though have heard the term before. It is also used in special triangles, so thought this was also a case of that. Instead, it seems they use 'altitude' to mean the actual height of the solid. I was trying to find the height..but it was already there. :)

Hi, How did you know that the base was 4a-a, and not 2a-a? Or even 4a-2a? I understand why you subtracted the numbers to get base and height but do not understand how you specifically found out how to subtract 4a-a. Thanks for any help.

1. A rectangular solid has a square base and altitude of 7. If the volume of the solid is 252, then the perimeter of the square base is A. 9 B. 24 C. 28 D. 36 E. 49 2. In a series of races, 10 toy cars are raced, 2 cars at a time. If each car must race each of the other cars exactly twice, how many races must be held? (A) 40 (B) 90 © 100 (D) 180 (E) 200 Ans: BB

comp, I meant if you were able to start your own threads, like I and others can do. It would be a benefit to all to see separate posts since we all have different questions. You can go to main page on GRE Math Forum and on the left hand side, you should see a link that says "New Thread". I'm just wondering if you can see that, though you should definately be able to.

Can someone solve this? There is a formula for it but had forgotten it, so need a reminder. Thanks. http://www.geocities.com/juliet_rain77/10.1q24.bmp