Search found 33 matches
Re: General question
Pick #s. (2) x+y=0 -->x=-y x=4, y=-4 |x=|y| Because x=-y nomatter what x is positive or negative |x|=|y| Is │x│=│y│? (1) x -y = 6 (2) x +y = 0 Here i took statement 2 and put x = -y in the equation │x│=│y│ and thus solve...
- by iwant700plus
Wed Apr 01, 2009 11:40 am- Forum: Data Sufficiency
- Topic: General question
- Replies: 2
- Views: 1074
If x is 3 or 9, then it would be sufficient because x-1 = 2, 8 which are factors of 104. Anyway, in stmt 2, you left out 27, which is divible by 27. that also gives x-1=26 which is a factor of 104. Remember to go back to the question, which is asking whether x-1 is a factor of 104. I don't get it. W...
- by iwant700plus
Wed Apr 01, 2009 11:31 am- Forum: Data Sufficiency
- Topic: MGMAT 700-800
- Replies: 21
- Views: 4390
I corrected it. Thanks for pointing it out and all your help on the forum. B-) B-) B-) So Ian, what do you suggest. STMT 2 is sufficient if we rule out x=1 i,e x-1 =0 to be a factor of 104? Please let me know. iwant700plus's solution above is perfect (except that '1' was left out of the list of fact...
- by iwant700plus
Tue Mar 31, 2009 4:32 pm- Forum: Data Sufficiency
- Topic: MGMAT 700-800
- Replies: 21
- Views: 4390
We cannot rule out x=1 because it satisfies all the conditions i.e x>0, x=int and x is a divisor of 27. However, if x=1, then x-1=0 and 0 is not a factor of 104, so stmt 2 will never be sufficient by itself. So Ian, what do you suggest. STMT 2 is sufficient if we rule out x=1 i,e x-1 =0 to be a fact...
- by iwant700plus
Tue Mar 31, 2009 7:04 am- Forum: Data Sufficiency
- Topic: MGMAT 700-800
- Replies: 21
- Views: 4390
Surface area = 2lw+2lh+2hw = 2(lw+lh+hw)=2(5(w+h)+wh) Let l=AB=5. What is w and h? 1) Let w=BC=8. Insufficient, no info about h. 2)V=lwh=80-->5wh->wh=16. While this gives us wh, it gives different values for w+h e.g 4*4=16, w+h=8 but for 2*8=16, 2+8=10. Insufficient. Taken together From stmt 1, we k...
- by iwant700plus
Tue Mar 31, 2009 4:01 am- Forum: Data Sufficiency
- Topic: Surface Area of Rectangular Solid
- Replies: 2
- Views: 1346
In statement 2, x=1, abut x-1 is 0. So I don't think you can count out zero in this case because x>0. Zero is divisible by all numbers Zero is neither negative nor positive The question states that x is a positive number and therefore it is not zero In Statement 2 Zero is not an option and all the o...
- by iwant700plus
Tue Mar 31, 2009 3:51 am- Forum: Data Sufficiency
- Topic: MGMAT 700-800
- Replies: 21
- Views: 4390
Ok, he is what I think. The sentence is comparing the satisfaction level of women for two cases: 1) satisfaction level if they take new jobs after retiring from their primary careers 2) satisfaction level if they retired completely and 1 is more than 2. C is comparing the satisfaction level of women...
- by iwant700plus
Mon Mar 30, 2009 11:48 am- Forum: Sentence Correction
- Topic: pls help with this PowerPrep sentence
- Replies: 25
- Views: 4060
- by iwant700plus
Mon Mar 30, 2009 7:26 am- Forum: Data Sufficiency
- Topic: rectangler solid
- Replies: 7
- Views: 1512
Let TC=FC+VC, where TC=Total Costs, FC=Fixed Costs and VC=Variable Costs VC decreased 5% 1) FC Increased by 13%. WE don't know the components of FC and VC to actually calculate the change in TC. insufficient. 2) FC= 5VC TC=5VC+VC TC=6VC. Since we know that VC went down 5% we can calculate the change...
- by iwant700plus
Mon Mar 30, 2009 7:03 am- Forum: Data Sufficiency
- Topic: Cost of article
- Replies: 8
- Views: 2411
This is a Yes/No question.
1) X=2, temptation is to plug 2 into the equation, but the question is asking us whether 5x+2y=12. We don't know the value of y, so could be Yes or No depending on value of Y. Insufficient.
2) 10X=24-4Y --> 5x+2y=12. This tells us a definite YES. Sufficient.
Ans. B.
- by iwant700plus
Mon Mar 30, 2009 6:46 am- Forum: Data Sufficiency
- Topic: Does 5x + 2y = 12 ?
- Replies: 3
- Views: 2208
1) Just gives the average speed for the entire journey. The car could have been going at 150mph or 90 mph at 8:00am. Insufficient. 2) We know the car was moving at a constant speed, but no information about speed. Insufficient. Taken together, the car moved at a constant speed of 120mph, therefore, ...
- by iwant700plus
Mon Mar 30, 2009 6:40 am- Forum: Data Sufficiency
- Topic: car moving at 8:00
- Replies: 1
- Views: 1278
X>0, x=int x-1 a factor of 104? Factors of 104 are 1, 2, 4, 8, 13, 26, 52, 104 1) X is divisible by 3 x=6; x is divisible by 3, but x-1=6-1=5 is not a factor of 104 x=9, x is divisble by 3 and x-1=9-1=8 is a factor of 104. Therefore statement 1 is insufficient. 2) 27 is divisible by x, therefore x=1...
- by iwant700plus
Mon Mar 30, 2009 6:36 am- Forum: Data Sufficiency
- Topic: MGMAT 700-800
- Replies: 21
- Views: 4390
You are right. Thanks for catching that! Using stmt 1--> 0=3b(-1/3)+b - we can solve for b. Sufficient. Ans is C. This did not solve for b since b just fell out and you're left with 0=0. What exactly is b? While unnecessary to solve for the answer in DS problems, solving for it is the definition of ...
- by iwant700plus
Mon Mar 30, 2009 4:07 am- Forum: Data Sufficiency
- Topic: Y Intercept Of Line
- Replies: 7
- Views: 3808
D=S*T Is D>6? We know T=1/2hr, so we are looking to answer the question is S>6/(1/2)=12mph? 1) S>16 feet per second - convert to mph --> 16/5280*3600 = approximately 10 mph So we know S>10mph--pick numbers: s=11 D=5.5 NO; S=13, D=6.5 Yes - Insufficient 2) Same process as above. S< 18 feet per second...
- by iwant700plus
Sun Mar 29, 2009 6:35 pm- Forum: Data Sufficiency
- Topic: distance
- Replies: 4
- Views: 1409
Picture a number line: -2 --- -1 --- 0 --- 1 --- 2 Is -2<y<1? 1) y>-1 pick numbers: y=0 YES -2<y<1; y=5 NO -2<y<1 - Insufficient. 2) y<2 again pick numbers: y=0 YES -2<y<1; y=-3 NO -2<y<1 - Insufficient. Together -1<y<2, again we realise the inequality -2<y<1 is not always true or always false. Insu...
- by iwant700plus
Sun Mar 29, 2009 6:11 pm- Forum: Data Sufficiency
- Topic: number line
- Replies: 1
- Views: 1097