Search found 392 matches
The correct answer is C. Note that the question implying that x is positive means x must always be greater than 0. Statement 1 is insufficient since x^2 = 3 => x = sqrt(3) or -sqrt(3) Statement 2 is insufficient because note that since we're not told y has to be an integer, y can take on the value 6...
- by truplayer256
Thu Jan 31, 2013 8:50 pm- Forum: Data Sufficiency
- Topic: Challenge#1 (Modulus/Absolute Value)
- Replies: 6
- Views: 2668
- by truplayer256
Mon Oct 01, 2012 8:14 pm- Forum: Problem Solving
- Topic: Average | Manhattan strategy guides
- Replies: 9
- Views: 2786
This is not too bad of a problem if you remember the following: Average speed = (total distance)/(total time) Assume the distance from town A to B was d, then it follows that: d/x = Since this is distance over speed, it is the time it took Jacob to drive from Town A to Town B. d/y = Time it took Jac...
- by truplayer256
Fri Sep 14, 2012 7:09 pm- Forum: Problem Solving
- Topic: High 700 level rate problem, any1 got good advice for such..
- Replies: 11
- Views: 8406
Assume the original number of students was s and the price of food per pound was f. Then for the year after that: # of students= 0.92s Price per lb of food = 1.20f Total cost of food for first year = sf Total cost of food for second year = (1.20)(0.92)(sf)= 1.104sf This value must be multiplied by 0...
- by truplayer256
Sun Sep 09, 2012 8:17 am- Forum: Problem Solving
- Topic: Percentage
- Replies: 2
- Views: 1451
- by truplayer256
Fri Sep 07, 2012 5:13 pm- Forum: Problem Solving
- Topic: Mixture
- Replies: 6
- Views: 1963
Assume she invested x$ at 5% and (1000 - x)$ at 6%. It then follows that:
0.05(x) + 0.06(1000 - x) = 53
60 - 0.01(x) = 53
x = $700 at 5%.
- by truplayer256
Fri Sep 07, 2012 5:02 pm- Forum: Problem Solving
- Topic: money
- Replies: 4
- Views: 1203
Note that for each month of life, the animal population has a 90% chance of living. Therefore, the number of animals expected to survive the first 3 months of life is:
200(0.9)^3 = 200(81*9)/(1000) = (81*9)/5 => ((80 + 1)*9)/5
= 144 + 9/5 = 145.8
About 146
Choose B.
- by truplayer256
Sat Sep 01, 2012 9:20 pm- Forum: Problem Solving
- Topic: animals
- Replies: 2
- Views: 1202
One way you can think of the problem is like this: The wildlife preserve needs 10,000 acres of watering area for 3,000 rhinos. That means that there is about 10/3 acres of watering area/rhino. With the increase of 10% => 3000(1.10) = 3300 rhinos Number of acres of preserve needed = 3300(100) + 10/3 ...
- by truplayer256
Sat Sep 01, 2012 9:16 pm- Forum: Problem Solving
- Topic: rhinoceroses
- Replies: 3
- Views: 1028
Let each side of the square be x. Area of square = x^2 Area of rectangular playground = (x + 30)(x - 20) Equating the two: x^2 = (x + 30)(x - 20) x^2 = x^2 + 10x - 600 600 = 10x => x = 60 m Choose E. Jim just made a slight mistake when he wrote -10x instead of +10x, so the answer should indeed be +6...
- by truplayer256
Thu Aug 30, 2012 8:21 pm- Forum: Problem Solving
- Topic: playground
- Replies: 3
- Views: 1646
Hi! Try searching some of these questions before you ask them and you may see a couple of the same ones asked before. I will however, take a bite at this one: Circumference of smaller rim = 28Ï€ Circumference of bigger rime = 35Ï€ If the smaller rim rotates x revolutions per second, then it means th...
- by truplayer256
Mon Aug 27, 2012 7:04 pm- Forum: Problem Solving
- Topic: Circular rim-Gmat Prep
- Replies: 1
- Views: 1052
Assume that each ounce of corn puffs provides c calories and each ounce of fruit x provides x calories. c + 8x = 257 After the substitution, we find that that number of calories that fruit y provides for each ounce is x/(1.8). c + 8x/(1.8) = 185 Solving both the equations: 8x(8/18) = 72 => x = 81/4 ...
- by truplayer256
Sun Aug 26, 2012 4:01 pm- Forum: Problem Solving
- Topic: carlories
- Replies: 1
- Views: 941
(6^n)/324 = (6^n)/(6^2*9)
Note that for choice A and B, we don't get a whole number integer as an answer so those can automatically be eliminated. However, for choice C, we see that we get 36/9 or 4. This choice makes the most sense.
- by truplayer256
Sun Aug 26, 2012 3:57 pm- Forum: Problem Solving
- Topic: 6^n
- Replies: 3
- Views: 985
- by truplayer256
Thu Aug 23, 2012 5:16 pm- Forum: Problem Solving
- Topic: x/y?
- Replies: 2
- Views: 893
Assume Raymond needs to cut x square feet of lawn.
Amount mowed on first day = x/3, Amount remaining = 2x/3
Amount mowed on second day = (2x/3)(1/2) = x/3, Amount remaining = x/3
Amount mowed on third day = (x/3)(3/4) = x/4, Amount remaining = x/12
Choose C.
- by truplayer256
Wed Aug 22, 2012 6:06 pm- Forum: Problem Solving
- Topic: lawn
- Replies: 3
- Views: 1243
Let the number of votes casted be x.
Amount of votes received by Beth = 3x/10
Remaining votes = 7x/10
In order for Beth to receive 1/2 of the votes casted, she needs to receive x/2 votes.
x/2 - 3x/10 = x/5
(x/5)/(7x/10) = 2/7
Choose B.
- by truplayer256
Tue Aug 21, 2012 6:32 pm- Forum: Problem Solving
- Topic: votes
- Replies: 3
- Views: 1217