Search found 18 matches
Need quick way to solve this DS
What is the remainderwhen a positive integer x is divided by 8?
a) When x is divided by 12 the remainder is 5
b) When x is divided by 18 the remainder is 7
What is the best and quick way to solve this problem?
- by gmatme
Thu May 17, 2007 8:09 am- Forum: Data Sufficiency
- Topic: Need quick way to solve this DS
- Replies: 2
- Views: 2159
DS question
If |a+4| = 2 What is the value of a?
1) a <0
2) a^2 + 8a + 12 =0
Isn't that 1) should be sufficient? a should -6 because it is -ve.
The answer is E?
- by gmatme
Thu May 17, 2007 7:41 am- Forum: Data Sufficiency
- Topic: DS question
- Replies: 4
- Views: 2492
Kaplan DS
if X^2 + 5Y = 49, is Y an Integer? 1) 1 < X < 4 2) X^2 is an integer. The answer is E? I think it should be C, can some one explain why E? The following is my reason for C) From 1) X could be 2, 3, 3/2 etc. If X is 2 or 3 then Y is an integer but if 3/2 then it is not so, 1) is not sufficient. From ...
- by gmatme
Sun Apr 29, 2007 10:02 am- Forum: Data Sufficiency
- Topic: Kaplan DS
- Replies: 2
- Views: 2852
x is the cost of the TV
Markup - x * 20/100
Sale price = Markup + cost
= x * 20/100 + x
= 1.2x
M/S = 0.2x/1.2x = 100/6 = 16 2/3
- by gmatme
Wed Apr 18, 2007 1:41 pm- Forum: Problem Solving
- Topic: 500 ps test25#9
- Replies: 2
- Views: 1886
PS -Fraction
Beth received 3/10 of the votes cast in a certain election. What fraction of the other votes cast would she have needed in order to have received 1/2 of the votes cast? (A) 1/5 (B) 2/7 (C) 3/10 (D) 7/20 (E) 1/2 Isn't that answer should be 1/5? Can some one please explain how answer could be 2/7?
- by gmatme
Wed Apr 18, 2007 8:13 am- Forum: Problem Solving
- Topic: PS -Fraction
- Replies: 4
- Views: 2842
Distance = rate x time So, for train A : z = R1 * X Train B : z = R2 * Y Let t be the time travelled by train A, since train B starts 2 hr earlier, the time travelled by train B is (t+2). To catch up the train B, train A and B should travel the same distance, R2 * (t+2) = R2 * (t) z/Y * (t+2) = z/X ...
- by gmatme
Mon Apr 16, 2007 11:12 am- Forum: Problem Solving
- Topic: Rate Problem
- Replies: 3
- Views: 1682
Married = 156
Self employed = 70
Married and self employed = (25% of 156) = 39
Self employed and not married = 70 - 39 =31
Probability = F/T = 31/248 = 1/8
- by gmatme
Thu Apr 12, 2007 1:55 pm- Forum: Problem Solving
- Topic: In a survey problem
- Replies: 2
- Views: 4145
- by gmatme
Thu Apr 12, 2007 1:43 pm- Forum: Problem Solving
- Topic: gmat prep question
- Replies: 1
- Views: 1669
Triangle
I know QS = 5 and PRS and PRQ are similar. How do i calculate PR?
PRS is 45-45-90 triangle?
- by gmatme
Wed Apr 11, 2007 11:47 am- Forum: Problem Solving
- Topic: Triangle
- Replies: 2
- Views: 2038
5^21 * 4 ^11 = 2 * 10^n
5 ^21 * (2^2)^11 = 5 ^21 * 2 ^22 = 5 ^21 * 2 ^21 * 2 = 10 ^21 * 2
So n = 21.
- by gmatme
Tue Apr 03, 2007 1:42 pm- Forum: Problem Solving
- Topic: GMAT Prep ques.
- Replies: 7
- Views: 2245
Let x be the pay for each month
x/y is the fraction saved for each month
so for 12 months it is 12 * (x/y). This is equal to 3 times not saved which is 3(1-x/y)
12 * (x/y) = 3 (1 - x/y)
so,
x/y = 1/5
- by gmatme
Tue Mar 27, 2007 7:44 am- Forum: Problem Solving
- Topic: GMAT Prep Problem 1
- Replies: 6
- Views: 2503
- by gmatme
Sun Mar 18, 2007 9:23 am- Forum: Data Sufficiency
- Topic: DS problem - graph
- Replies: 3
- Views: 3367
- by gmatme
Sun Mar 18, 2007 8:56 am- Forum: Data Sufficiency
- Topic: DS problem - graph
- Replies: 3
- Views: 3367
- by gmatme
Sun Mar 18, 2007 8:50 am- Forum: Problem Solving
- Topic: Ratio problem
- Replies: 5
- Views: 2965
Ratio problem
The number of stamps that kaye and Alberto had were in the ratio 5:3 respectively. Afer Kaye gave Alberto 10 of her stamps, the ratio of the number of kaye had to the number Alberto had was 7:5. As a result of this gift, kaye had how many more stamps than Alberto? a) 20 b) 30 c) 40 d) 60 e) 90 Ans g...
- by gmatme
Sun Mar 18, 2007 8:39 am- Forum: Problem Solving
- Topic: Ratio problem
- Replies: 5
- Views: 2965