Search found 34 matches
Given that XY + Z = X(Y + Z)
xy + z = xy + xz
xy + z - xy - xz = 0
z - xz = 0
z(x-z) = 0
z=0 OR x = z
- by mmukher
Mon Apr 07, 2008 7:21 pm- Forum: Problem Solving
- Topic: OG question
- Replies: 7
- Views: 1912
Can't wrap my brain around that statement. Can anyone help please .We know that y is the biggest number of 11s that goes into 11*19 + 3... so y = 19. Finally, 19/19 gives us a remainder of 0: choose (a).
- by mmukher
Mon Apr 07, 2008 7:17 pm- Forum: Problem Solving
- Topic: Divisibility (Remainders): When the pos int x is div by 11,
- Replies: 10
- Views: 2604
The answer choices are given in terms of x. I would solve it like this.
Square 1 : side = x, area = x^2
Square 2: side = 2x, area = (2x)^2 = 4x^2
It works even when you plug in your numbers (2) in 4x^2 = 4(2)^2 = 16
- by mmukher
Sun Apr 06, 2008 4:35 pm- Forum: Problem Solving
- Topic: geometry
- Replies: 5
- Views: 1854
The method that you described is probably the fastest way to solve this one. I did it the same way as well.
- by mmukher
Sat Apr 05, 2008 8:57 pm- Forum: Problem Solving
- Topic: Algebra Kaplan
- Replies: 4
- Views: 1647
Algebraic solution :
Cost of 1 gallon = G
Cost of 10 gallons = 10G
After discount d% = 10G [ (100-d)/100 ] ... = 10G - DG/10
Total cost of discounted gas + 1 soda = 10G - DG/10 + S
- by mmukher
Sat Apr 05, 2008 8:51 pm- Forum: Problem Solving
- Topic: word problem kaplan word problem
- Replies: 3
- Views: 1745
Setup Grid Assume B does 100 miles/gallon and cost of fuel for B is 100$/gallon Car || Miles/Gallon || Cost/Gallon || Cost/Mile B || 100 || 100 || 1 A || 125 || 110 || 110/125 Percentage difference in costs is (B-A)/B * 100 solve and get 12. Excuse the 'grid' it doesnt really display nice here. But ...
- by mmukher
Sat Apr 05, 2008 8:40 pm- Forum: Problem Solving
- Topic: kaplan word problem
- Replies: 4
- Views: 2073
More Primes
In a certain game, a large bag is filled with blue, green, purple and red chips worth 1, 5, x and 11 points each, respectively. The purple chips are worth more than the green chips, but less than the red chips. A certain number of chips are then selected from the bag. If the product of the point val...
- by mmukher
Sat Apr 05, 2008 8:11 pm- Forum: Problem Solving
- Topic: More Primes
- Replies: 93
- Views: 45575
Thanks, that helped.
The diagram as drawn made the figure look symmetrical wrt to the Y axis and that through me off.
The key was to guess given the sides as 1:sqrt3:2 as a 30-60-90 triangle on the left of the Y-axis.
Thanks, this was driving me nuts.
- by mmukher
Sat Apr 05, 2008 10:36 am- Forum: Problem Solving
- Topic: Powerprep : Co-oridnate Geom, Triangles
- Replies: 4
- Views: 1538
Powerprep : Co-oridnate Geom, Triangles
Need some help with this one. It looks easy, but I solve and get another answer
- by mmukher
Sat Apr 05, 2008 9:07 am- Forum: Problem Solving
- Topic: Powerprep : Co-oridnate Geom, Triangles
- Replies: 4
- Views: 1538
- by mmukher
Tue Apr 01, 2008 6:07 pm- Forum: Critical Reasoning
- Topic: Another1 Which I feel the Answer is wrong!
- Replies: 4
- Views: 2609
Havent seen the 'anagram' method, but this is basic permutations and combinations. 1)ex. 1) The principal pf a high school needs to schedule observations of 6 teachers. SH eplans to visist one teacher each day for a week, so she will only have time to see 5 of the teachers. How many different observ...
- by mmukher
Fri Mar 28, 2008 10:30 am- Forum: Problem Solving
- Topic: combinations basics
- Replies: 7
- Views: 5191
- by mmukher
Sun Mar 23, 2008 1:10 pm- Forum: Problem Solving
- Topic: Sum of Sequences
- Replies: 9
- Views: 1950
- by mmukher
Sun Mar 23, 2008 5:15 am- Forum: Data Sufficiency
- Topic: Tough DS: Factors & Multiples
- Replies: 10
- Views: 4804
Are you sure you have the exact problem ?
This doesn't make sense to me if both populations are growing at the same rate. Looking at the answer is it J has twice as many ?If in 5 years, Country J has as many people as Country S
thx
- by mmukher
Sat Mar 22, 2008 10:24 pm- Forum: Problem Solving
- Topic: manhattan review population
- Replies: 2
- Views: 1984
Probability "with replacement"
5. An urn contains 7 red and 4 blue balls. Find the corresponding probabilities if the balls are replaced after each draw. (a) both red (b) a red and a blue (c) both the same colour. I can solve for "without replacement" but any ideas for with replacement? For eg 5a. I think should be 7/11...
- by mmukher
Sat Mar 22, 2008 5:36 pm- Forum: Problem Solving
- Topic: Probability "with replacement"
- Replies: 10
- Views: 48849