Search found 44 matches
Is |x | = y - z ? (1) x + y = z (2) x < 0 I will post QA after some discussion. Basically we need to check if y-z > 0.From Stmt1: we do not have any info about the nature of x,y and Z.So, I is insufficient. From Stmt 2: X is negative.This does not indicate anything about y and z. Combining I and II...
- by skprocks
Sun Aug 22, 2010 7:02 pm- Forum: Data Sufficiency
- Topic: Is |x | = y - z ?
- Replies: 8
- Views: 1652
If the integer n is greater than 1, is n equal to 2 (1) n has exactly 2 positive factors (2) The difference of any two distinct positive factors of n is odd OA is B When I came to this question, I considered "1" not to be a factor, so I took E. However, if "1" is considered as a...
- by skprocks
Sun Aug 22, 2010 6:57 pm- Forum: Data Sufficiency
- Topic: GMATPrep Test1 Question
- Replies: 5
- Views: 1361
I really need help with exponents and roots. Could someone please explain how for 1) a=b or -a=b I need some good help!! thanks! What is the value of a? 1) a^2=b^2 2) b-a=-12 From Stmt1: since a^2=b^2.We can conclude that a=b or a=-b.Since a negative number raised to a even power always yields a po...
- by skprocks
Sun Aug 22, 2010 6:53 pm- Forum: Data Sufficiency
- Topic: exponents and roots
- Replies: 4
- Views: 1067
WHAt is the value of (x-y)^4 (1) The product of x and y is 7. (2) x and y are integers. Stmt1: X and Y can be any number,integer or fraction as sufficient info is unavailable.So,I is insufficient. Stmt2: X and Y can be any integer.Value of (x-y)^4 can not be uniquely determined. Consider Stmt1 and ...
- by skprocks
Sun Aug 22, 2010 6:47 pm- Forum: Data Sufficiency
- Topic: Power of 4th degree.
- Replies: 3
- Views: 1135
With 2, Y can either be -8 or 14. Since, in (1) we know y>2, -8 can't be correct, so it has to be 14, which means both are required to be suff. In light of what you have explained about stmt1,stmt 2 shall also be always positive.How can it assume both positive and negative values?(-8/14). Sorry to ...
- by skprocks
Sun Aug 22, 2010 12:22 pm- Forum: Data Sufficiency
- Topic: MGMAT CAT 5 DS 700-800
- Replies: 4
- Views: 1156
If x is a positive number less than 10, is z greater than the average of x and 10? (1) On the number line, z is closer to 10 than it is to x. (2) z = 5x hi guys, can you explain for me why the answer is A but not E bc from statement if z=9 ( also close to 10) and x=8 thus 9=(10+8)/2?? Solution: Fro...
- by skprocks
Sun Aug 22, 2010 12:09 pm- Forum: Data Sufficiency
- Topic: a manhattan data question
- Replies: 2
- Views: 852
MGMAT CAT 5 DS 700-800
What is the value of y? (1) 3|x^2 – 4| = y – 2 (2) |3 – y| = 11 OA is C I am unable to comprehend that |x^2-4| > 0.And thus y-2 > 0.This is not clear to me.Why can't it be possible that y-2 < 0 as we do not know the value of x.Please explain.The source of the question is a MGMAT CAT.MGMAT staf...
- by skprocks
Sun Aug 22, 2010 11:55 am- Forum: Data Sufficiency
- Topic: MGMAT CAT 5 DS 700-800
- Replies: 4
- Views: 1156
http://s4.postimage.org/ewzBS.jpg please someone suggest/help Please post the text instead of images.Image posted by you is too small. Sum of n consecutive positive integers is 45.What is the value of n? I. n is even II. n < 9 From Stmt 1: as n is given as even.This is insufficient. Because a+a+1=4...
- by skprocks
Fri Aug 20, 2010 11:18 pm- Forum: Data Sufficiency
- Topic: numbers
- Replies: 1
- Views: 879
can someone help with the exaplantion of each answer chocie If Points X and Y are two distinct points in the Coordinate Plane;which of the following can have more than one possible value? A.Circumference of Circle with diameter XY B.Area of Square with diagonal XY C.Perimeter of Right Isoceles Tria...
- by skprocks
Fri Aug 20, 2010 11:08 pm- Forum: Data Sufficiency
- Topic: DS geometery
- Replies: 3
- Views: 1110
Below is the question from OG, a real tough one. I am totally clueless on this one. Please help me out. Thanks in advance Beginning in January of last year, Carl made deposits of $120 into his account on the 15th of each month for several consecutive months and then made withdrawals of $50 from the...
- by skprocks
Fri Aug 20, 2010 10:54 pm- Forum: Data Sufficiency
- Topic: A very hard, above 700 DS question from OG 12
- Replies: 12
- Views: 7789
DS 121 OG 12
This Problem requires diagrammatical solution.Please help. In the xy-plane, region R consists of all the points (x, y) such that 2x + 3y = 6. Is the point (r, s) in region R ? (1) 3r + 2s = 6 (2) r = 3 and s = 2 Please provide an explannation to this one.Kindly,write the solutions such as they are c...
- by skprocks
Wed Aug 18, 2010 4:00 pm- Forum: Data Sufficiency
- Topic: DS 121 OG 12
- Replies: 0
- Views: 1110
DS 122 OG 12
What is the volume of a certain rectangular solid? (1) Two adjacent faces of the solid have areas 15 and 24, respectively. (2) Each of two opposite faces of the solid has area 40. Please provide an explannation.The second statement is not clear to me."Each" of Two Opposite faces,does this ...
- by skprocks
Wed Aug 18, 2010 3:56 pm- Forum: Data Sufficiency
- Topic: DS 122 OG 12
- Replies: 2
- Views: 2011
Circle C and line k lie in the xy–plane. If circle C is centered at the origin and has radius 1, does line k intersect circle C? (1) The x–intercept of line k is greater than 1 (2) the slope of line k is –1/10 ----- I figures out that the equation of the line should y=-x+1 ... but then could ...
- by skprocks
Tue Aug 17, 2010 9:07 am- Forum: Data Sufficiency
- Topic: How to do this geometry problem..?
- Replies: 10
- Views: 2073
Hi Andrea, The colorization of black-and-white films by computers is defended by those who own the film rights, for the process can mean increased revenues for them; many others in the film industry, however, contend that the technique degrades major works of art, which they liken to putting lipsti...
- by skprocks
Mon Aug 16, 2010 8:52 am- Forum: Sentence Correction
- Topic: colorization
- Replies: 4
- Views: 1917
Medical Researcher: As expected, records covering the last four years of ten major hospitals indicate that babies born prematurely were more likely to have low birth weights and to suffer from health problems than were babies not born prematurely. These records also indicate that mothers who had re...
- by skprocks
Sat Aug 14, 2010 3:15 am- Forum: Critical Reasoning
- Topic: Adequate Prenatal Care
- Replies: 3
- Views: 2606