mmesarina

In your picture above , you are assuming that the Y point is on the radial line that crosses through P and X. The statement only says that Y is on the same xy plane. So could be for example in this position : ------4.5-----P-----4.5------X--------------9------------------------Y So could you explain why this case is excluded? thanks

Hi, can someone please show me how this is solved? A certain circular area has its center at point P and has a radius 4, and points X and Y lie in the same plane as the circular area. Does point Y lie outside the circular area? 1) The distance between point P and point X is 4.5 2) the distance between point X and Y is 9 official answer my answer: stmt1 : X is outside the circle because its distance to the center of the circle is > 4. But we do not know anything about Y so => insufficient. stmt2 : we do not know where x or y is with respect to circle so insufficient Both, insufficient because Y could be one the left or right side of the point x at different angles. Sometimes Y would be inside the circle , sometimes not. So my answer is E, but this iincorrect, so what the hell am i doing wrong?

Hi, can someone tell me which is right: instead of : is followed by a subject rather than : is followed by a verb or clause? or is it the opposite, can someone give examples?

I do not agree with the oa, can someone explain? If the integer n is greater than 1 , is n equal to 2? 1) n has exactly two positive factors 2) the difference of any two distinct positive factors of n is odd the oa is My answer: stmt1) n = a * b , a and b can be any numbers, so insufficient. The oa says that if n has exactly 2 positive factors then it is prime, but this is not true, this is true only if the factors are prime numbers. A factor of a number could be a multiple of some prime, so this is confusing me. I thought that the GMAT people differentiated between "factors" and "prime" factors. stm2) n = a * b *c * d * etc. and the difference of any two is odd, that is |a-b| = odd |a-c| = odd |a-d| = odd |b-c| = odd etc, etc from this , I deduce that n has to have only two factors, because otherwise then we can't just pick any two factors and have a difference that is odd. So n = a * b. Now if the difference of a and b is odd, then either of one is odd. Say a is odd, and b even. Then we can have a = 2 and b = 1, or a = 4, and b = 3, etc, etc. so this is insufficient, because n can be any even number. Combining, both I still don't have enough info. Only if they were to tell me that the factors of n are prime, could i say that the answer is B, because the only even prime is 2, but they do not tell me this, so I chose E. Any other explanations? -malena

this is the best explanation from my point of view thanks

Yes, you are right. Sorry, for the mistake. It looks like when I was reviewing my mistakes, since the DS section was section 4, I took column 4 as being the solution column for the DS section, when in fact the colum was number 3, and colum 4 was for section 4. It looks like i made this mistake when correcting some of the problems I got wrong. I guess I was too tired . -Malena

Hi Bob, it seems like you know hwo to solve this problem. Could you provide an explanation when you have time, thank you. As you can see we are all puzzled. -Malena Thank you Bob, I just looked again, and yes the asnswer key is B. The problem was section 4, problem number 11. When I was looking at the answer key, i must have inadvertedly seen the answer key for section 5, problem 11 which is right next to this problem asnwer key, and that one is E. Sorry guys for the mistake, all my fault. Well, that is good for me, looks like I got that right -:) -Malena

The question appeared in testcode 52, from ETS, which is one of the real paper test versions the gmat.com sells. The OA is , which as you guys , I do not agree with . I found already about three OA's in the several paper tests that I found and others to be doubtfully correct. -M

I put the OA behind the SPOILER quotes , it is

thansk guys

thank you!

Can someone please tell me why stmt2 is not sufficient stmt1: (t-r)/r = 0.15 and (t-r) = 3 so r = 3/0.15, sufficient stmt2 : the area of the concrete section is pi * r^2 = 1.29 pi , so r^2 = 1.29 , sufficient so D is my answer but the oA is Sorry for forgetting to attach the question, here it is.

Could someone please tell me what am I doing wrong? thanks My answer: Line equation: y = mx + 30 m = (x2-x1)/(y2-y1) m = (50-0)/(0-30) m = -5/3 so line equation: y = -5/3x + 30 So x has to be a multipel of 3 in order for y to be an integer too. And x is between 0 and 50, 0 Trying numbers for x and stoppin when y goes below 0, since these are the only integer points on the line. x = 3 y = 25 x = 6 y = 20 x = 9 y = 15 x = 12 y = 10 x = 15 y = 5 x = 18 y = 0 therefore, there are only 6 points, but this answer is not one of the answers given, so what did I do wrong? thanks

A wildlife preserve is being planned for 3000 rhinoceroses. The preserve is to contain a total of 10,000 acres of watering area, plus 100 acres of grazing area for each rhinoceros. If the number of rhinocerose is expected to increase by 10 percent, how many thousand acres should the preserve have in order to provide for the increased population? A) 340 B) 330 C) 320 D) 310 E) 300 oa is

Can someone please give a detail explanation? If Carmen had 12 more tapes , she woudlhave twice as many tapes as Rafael. Does Carment have fewer tapes than Rafael? 1) Rafael has more than 5 tapes 2) Carmen has fewer than 12 tapes