Search found 30 matches
Ans is "B" The cost of window is twice more than the cost of shalve (2) the total price is always same ($1800) possible outcome (1,22) (2,20) (3, 18 )...so on If you purchase 1 more window, you would give up 2 shalves, which means that the totoal price is same since the window costs twice ...
- by josephcho77
Tue Nov 27, 2007 12:24 am- Forum: Data Sufficiency
- Topic: windows and shalves
- Replies: 5
- Views: 2005
factor problem
If M is the least common multiple of 90, 196, and 300, which of the following is NOT a factor of M?
A. 600
B. 700
C. 900
D. 2,100
E. 4,900
Is there easier way to slove this problem other than factoring all 90, 196, 300 and finding the least common multiple? Thanks in advance!
- by josephcho77
Sat Nov 24, 2007 11:08 am- Forum: Problem Solving
- Topic: factor problem
- Replies: 2
- Views: 1631
- by josephcho77
Sat Nov 17, 2007 1:58 am- Forum: Problem Solving
- Topic: Geometry
- Replies: 1
- Views: 1485
GMAT Prep
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 My answer is E but OA is A. How can A be the answer? If Z=9 ans X=8, Z is same as the average of X and 10 If Z=9 and X=6, Z is greater than the average ...
- by josephcho77
Mon Oct 29, 2007 10:55 pm- Forum: Data Sufficiency
- Topic: GMAT Prep
- Replies: 2
- Views: 1740
Let X be the toal students
# of students taking science = 40+1/3X
# of students taking physics = 1/4(40+1/3X)
Also 1/8 of all the students are taking physics = 1/8X
Therefore, 1/4(40+1/3X)=1/8X
Solve for X which is 240.
- by josephcho77
Sun Oct 28, 2007 9:25 am- Forum: Problem Solving
- Topic: How to solve this???
- Replies: 2
- Views: 2633
I will go with "C"
The ability to produce photographs of superb artistic quality does not itself guarantee since conveying rhythm depends less on the artistic quality of the individual photographic images than on how the shots go together and other aspects.
- by josephcho77
Thu Oct 25, 2007 9:37 pm- Forum: Critical Reasoning
- Topic: Moviemaking Test12 Q14, 1000CR
- Replies: 8
- Views: 3748
I will go with "E" Even though the volume of hydrocarbons exceeds that of buried organisms, if bacterial action reduces the volume of other complex hydrocarbons greater than chemical transformations reduce the volume of buried hydrocarbons derived from organisms, there is no guarantee that...
- by josephcho77
Thu Oct 25, 2007 9:27 pm- Forum: Critical Reasoning
- Topic: Oil Reserves - CR 1000, Test 12 Q19
- Replies: 2
- Views: 1858
- by josephcho77
Thu Oct 25, 2007 4:41 pm- Forum: Critical Reasoning
- Topic: CR question
- Replies: 9
- Views: 2932
CR question
Guidebook writer: I have visited hotels throughout the country and have noticed that in those built before 1930 the quality of the original carpentry work is generally superior to that in hotels built afterward. Clearly carpenters working on hotels before 1930 typically worked with more skill, care,...
- by josephcho77
Thu Oct 25, 2007 5:47 am- Forum: Critical Reasoning
- Topic: CR question
- Replies: 9
- Views: 2932
exponent problem
99,999^2 - 1^2 =
A. 10^10 - 2
B. (10^5 – 2)^2
C. 10^4(10^5 – 2)
D. 10^5(10^4 – 2)
E. 10^5(10^5 – 2)
Can anyone help to solve above problem? Thanks!
- by josephcho77
Tue Oct 23, 2007 9:43 pm- Forum: Problem Solving
- Topic: exponent problem
- Replies: 4
- Views: 1915
Working rate question
Running at their respective constant rates, machine X takes 2 days longer to produce w widgets than machine Y. At these rates, if the two machines together produce 5/4 w widgets in 3 days, how many days would it take machine X alone to produce 2w widgets? A. 4 B. 6 C. 8 D. 10 E. 12 Can anyone please...
- by josephcho77
Thu Oct 18, 2007 6:44 am- Forum: Problem Solving
- Topic: Working rate question
- Replies: 1
- Views: 1571
Hi! D is the correct answer. Since a tabletop is a square, let x be the length and width. After changes were made, the new area would be (x-1)*(x+2) (1) says that (x-1)*(x+2)=70 which is x^2+x-72=0 (x+9)(x-8 )= 0 x can be -9 or 8 but since length or width can't be negative x is 8 (sufficient) (2) sa...
- by josephcho77
Wed Oct 17, 2007 11:44 pm- Forum: Data Sufficiency
- Topic: Change in area
- Replies: 2
- Views: 1562
(1) ax^4=a, x can be 1 or -1
when x is 1, ax^4 + ax^3 = a+b
but when x is -1, ax^4 + ax^3 = a-b
(2) bx^3=b, x can only be 1 thus ax^4+bx^3 is always a+b
- by josephcho77
Sun Oct 14, 2007 10:38 pm- Forum: Data Sufficiency
- Topic: Exponential problem!
- Replies: 1
- Views: 1267
Stmt.2 is also insuff.
Plug simple number
when x=1 and y=1
-1<1 satisfy the condition and y>0
when x=2 and y=-1
1<2 satisfy the condition but y<0
Even though you combine two condition y can be positive or negative
therefore the answer would be "E"
- by josephcho77
Mon Oct 08, 2007 5:10 am- Forum: Data Sufficiency
- Topic: Inequality - set11 Q28
- Replies: 1
- Views: 1440
Hey Sam!
I think that even though we combine the two condition we have two value.
you mentioned ADCB.
What about ACDB
A is to the left of D and C is the mid-point, then distance between B and D is 1. Therefore, we have two value 1, and 17 even though we combine.
- by josephcho77
Sun Oct 07, 2007 8:04 pm- Forum: Problem Solving
- Topic: Number line
- Replies: 4
- Views: 2397