Search found 363 matches
Is |x| = y - z? (1) x + y = z (2) x < 0 Rephrased question is (y-z) >= 0? 1) x + y = z y-z = -x: we dont know if x is positive or negative If x >0; y-z is negative If x <0; y-z is positive Insufficent 2) x<0 We know nothing about y or z so statement is insufficent Combined: x + y = z -> y - z = -x a...
- by theCEO
Fri Nov 27, 2015 9:13 pm- Forum: Data Sufficiency
- Topic: Is |x| = y - z?
- Replies: 6
- Views: 2314
Is |x| = y - z? (1) x + y = z (2) x < 0 Are statmnts (1) & (2) not saying the same thing? Cos if x + y = z; it implies x<0; Else, x = y - z ..for x>0 OA C Statement 1 and 2 are not saying the same thing. Statement 1 is saying: x = z - y; x can have any value (negative, positive or 0) Statement ...
- by theCEO
Fri Nov 27, 2015 8:55 pm- Forum: Data Sufficiency
- Topic: Is |x| = y - z?
- Replies: 6
- Views: 2314
Two vessels contain milk solutions , with milk and water in the ratio 2:11 in first vessel and in the ratio of 5:9 in the second. In what ratio should the contents of these two vessels be mixed such that resultant mixture has milk and water in the ratio 3:8 ? a) 169/238 b) 238/169 c)138/269 d)269/1...
- by theCEO
Fri Nov 27, 2015 11:27 am- Forum: Problem Solving
- Topic: Mixtures
- Replies: 1
- Views: 1372
Hi TheCEO , Thanks for your reply. So how do we come to know , which equation is correct and which one we have to use? Thanks, SJ The key to knowing which one is correct is to use the information from the second statement. If the information from the second statement, helps you pick the correct equ...
- by theCEO
Mon Nov 23, 2015 2:11 am- Forum: Data Sufficiency
- Topic: Absolute Values
- Replies: 9
- Views: 2964
Now √4x is equal to 2√x, so if √x yields to 1.5 or 2.5 or 3.5 etc... √4x or 2√x will be always an integer. so how come this statement is sufficient? why did we assume that √x must be an integer if √4x is an integer although √4x =2√x If x is a positive integer , is √x an integer? ...
- by theCEO
Sun Nov 22, 2015 2:31 pm- Forum: Data Sufficiency
- Topic: If x is a positive integer, is sqrt(x) an integer?
- Replies: 9
- Views: 11618
Q: If y is the smallest positive integer such that 3,150 multiplied by y is the square of an integer, then y must be: A: 2 B: 5 C: 6 D: 7 E: 14 [spoiler] OA: E[/spoiler] I know we break this down by primes, but I don't understand why we need to get the single prime factors and multiply. Maybe I don...
- by theCEO
Sun Nov 22, 2015 2:07 pm- Forum: Problem Solving
- Topic: if Y is the smallest positive integer (no. properties)
- Replies: 7
- Views: 3897
Hi Experts , Can you please check and correct me. Statement 1 : 3|x^2-4| = y - 2 If I solve this , will get two equation.. a) 3x^2 - y = 10 ....(|) b) 3x^2 + y = 14 ....(||) so can we solve these two above equation and get the value of y? Please advise and correct me.. Thanks, SJ Hi SJ, Inequalitie...
- by theCEO
Sun Nov 22, 2015 7:21 am- Forum: Data Sufficiency
- Topic: Absolute Values
- Replies: 9
- Views: 2964
The Team-11 has played half of its due number of matches so far, out of which it has won 40 percent of the matches and lost the rest of these. Which of the following value could represent the possible number of the remaining matches the Team-11 must win in order to register an overall win percent o...
- by theCEO
Fri Nov 20, 2015 7:12 pm- Forum: Problem Solving
- Topic: theTeam-11 must win
- Replies: 13
- Views: 3553
The Team-11 has played half of its due number of matches so far, out of which it has won 40 percent of the matches and lost the rest of these. Which of the following value could represent the possible number of the remaining matches the Team-11 must win in order to register an overall win percent o...
- by theCEO
Fri Nov 20, 2015 7:00 pm- Forum: Problem Solving
- Topic: theTeam-11 must win
- Replies: 13
- Views: 3553
The Team-11 has played half of its due number of matches so far, out of which it has won 40 percent of the matches and lost the rest of these. Which of the following value could represent the possible number of the remaining matches the Team-11 must win in order to register an overall win percent o...
- by theCEO
Thu Nov 19, 2015 1:09 am- Forum: Problem Solving
- Topic: theTeam-11 must win
- Replies: 13
- Views: 3553
A certain expressway has Exits J, K, L, and M, in that order. What is the road distance from Exit K to Exit L ? (1) The road distance from Exit J to Exit L is 21 kilometers. (2) The road distance from Exit K to Exit M is 26 kilometers. I thought the answer would be D because, we know the distance f...
- by theCEO
Tue Nov 10, 2015 12:33 am- Forum: Data Sufficiency
- Topic: Exits
- Replies: 7
- Views: 1927
http://s17.postimg.org/lh1wzft0b/Screenshot_2015_11_09_07_44_34.jpg Weight of vinegar / total weight of solution = 4/10 Weight of vinegar / 12 = 4/10 Weight of vinegar = 4.8 To make a 25% vinegar solution: we need to add x oil 4.8 ounce of vinegar / (12 + x)ounces = 25/100 480 = 300 + 25x 180 = 25x...
- by theCEO
Sun Nov 08, 2015 10:10 pm- Forum: Problem Solving
- Topic: Mixture
- Replies: 7
- Views: 1925
Unfortunately, no. I believe I'm having trouble approaching each problem the proper way. Ok. To help you out, please explain in details step by by step why you thought C was correct and then I will see where you went wrong. After reading the question I notice that the first statement gives me only ...
- by theCEO
Sat Nov 07, 2015 6:03 am- Forum: Data Sufficiency
- Topic: Explanation
- Replies: 11
- Views: 1997
Some of the students enrolled at college T are part-time students and the rest are full-time. By what percent did the number of full-time students enrolled at college T increase from fall of 1999 to the fall of 2000? 1) There were 50 more full-time students enrolled at college T in the fall of 2000...
- by theCEO
Fri Nov 06, 2015 8:57 pm- Forum: Data Sufficiency
- Topic: The students enrolled at college T
- Replies: 2
- Views: 1571
Is x2 greater than x ? (1) x2 is greaer than 2x. (2) 2x2 is greater than x. Please explain using the Critical Points method. 1) x^2 > 2x x^2 - 2x > 0 x(x - 2) > 0 a x b = positive when a and b are either negative or positive therefore x and x-2 are either positive or negative when x and x-2 are pos...
- by theCEO
Fri Nov 06, 2015 8:40 pm- Forum: Data Sufficiency
- Topic: Is x2 greater than x ?
- Replies: 2
- Views: 1803