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Statement 2 states that the difference of ANY two distinct positive factors of n is odd. That means the difference of ANY 2 positive factors of n must be odd. The positive factors of 6 are - 1,2,3,6. While 6-1 is odd, 6-2 is even. Statement 2 rules out all even numbers > 2. It also rules out all non...
- by ssy
Sat Sep 19, 2009 12:41 am- Forum: Data Sufficiency
- Topic: Number Properties
- Replies: 1
- Views: 1388
Tough question, let me give it a shot.. From the question stem - For x to be divisible by 4, it needs to be even. As 4=(2)(2), x also needs to have at least two 2s in its prime factorization to be divisible by 4. 1) Translated into an equation, this means: [(x^2)+(y^2)]/8=int + 5 [(x^2)+(y^2)] =8(in...
- by ssy
Thu Sep 17, 2009 1:05 am- Forum: Data Sufficiency
- Topic: Remainder
- Replies: 11
- Views: 1726
Statement 1 10z=93120 z=9312 Hundreds digit is 3. Statement 1 is sufficient. Statement 2 z is between 9251 and 9349. For any value between 9251 and 9299, the hundreds digit is 2. For any value between 9300-9349, the hundreds digit is 3. Hence, this statement is insufficient. As evidenced in your ori...
- by ssy
Thu Sep 17, 2009 12:09 am- Forum: Data Sufficiency
- Topic: Hundredth digit
- Replies: 4
- Views: 1862
Let G = Girls B=Boys 1) This can be written as G<3B. Using real numbers, let the number of boys equal 10. Hence, G<3(10)= G<30. To satisfy G<30: G could be 5 and B is 10, in which case G<B G could also be 15 and B is 10, in which case G>B. This statement is thus insufficient. 2)This can be written a...
- by ssy
Thu Sep 17, 2009 12:02 am- Forum: Data Sufficiency
- Topic: WORD PROBLEM
- Replies: 3
- Views: 1173
Hi Cramya - Can you please explain from this step onwards? I'm not sure how you got 2A^2 and A^2, what happened to B and 2B in the equation? Many thanks. 2 A^2 (OLD RATE A) = A^2 (NEW RATE A) Take square root of both sides sqrt(2) * A(OLD RATE A) = A(NEW RATE A) 1.4 * A(OLD RATE A) = A(NEW RATE A) 1...
- by ssy
Sun Jan 11, 2009 8:07 am- Forum: Problem Solving
- Topic: never seen q like this before...would appreciate explanation
- Replies: 5
- Views: 2078
Is the answer 4? I did this by picking numbers. As Aaron is now 3 times the age of Sarah, you know that the numerical value of his age must be a multiple of three. So, only pick numbers which is a multiple of three from 24 onwards. So Aaron = 27yrs and Sarah = 27-24 = 3 yrs (NO) / Aaron = 30 years a...
- by ssy
Thu Oct 09, 2008 11:44 pm- Forum: Problem Solving
- Topic: daughter sarah was born
- Replies: 3
- Views: 3525
Q1: As the passage is meant to be an objection to an original claim, the key to this question is to find a claim that is the exact opposite of the point in the given passage. The point in the given passage is that we cannot decide to define intelligent life in a more precise manner. So, we should be...
- by ssy
Tue Sep 30, 2008 1:09 am- Forum: Critical Reasoning
- Topic: Two tough CR's help required
- Replies: 2
- Views: 1697
GMAT Focus from mba.com - Worth purchasing?
Has anyone bought the GMAT Focus math program from Mba.com? It seems to be a new product from the GMAT makers and looks good.
http://www.mba.com/mba/TaketheGMAT/Tool ... TFocus.htm
Is it worth buying? Do you see repeat questions from the current powerprep or OG11?
- by ssy
Tue Sep 30, 2008 12:36 am- Forum: GMAT Strategy
- Topic: GMAT Focus from mba.com - Worth purchasing?
- Replies: 1
- Views: 1934
For question C, the way I solved is is by process of estimation. (999/100) = 9.99 Since it is (999/100) PLUS a positive number (1/999), the answer clearly has to be larger than 9.99 and the only option is 10. Indeed, if you approximated (1/999) to become (1/1000), it becomes 0.001. 9.99+0.001 = 9.99...
- by ssy
Tue Sep 30, 2008 12:17 am- Forum: Problem Solving
- Topic: Taking my Test on Tuesday! Need help with a few problems~
- Replies: 3
- Views: 2361
Mals24 - I'm not sure if I understand your explanation. Could you please clarify? What do these equations mean? Thanks!
xC1+xC2>12
5C1 + 5C2 = 5+10 = 15
- by ssy
Mon Sep 22, 2008 1:33 am- Forum: Problem Solving
- Topic: color coding
- Replies: 5
- Views: 4201
I am not quite sure why my number 8 have turned into smiley faces in my post above!
Please replace all smiley faces with the number 8.
- by ssy
Mon Sep 22, 2008 1:23 am- Forum: Problem Solving
- Topic: Probability Problem
- Replies: 10
- Views: 3242
Kidboc1 - What is the answer? Please provide answer options. Using a similar method to Varun, I got ans=1/3 . The probabily of it being all woman is: [(6/10)(5/9)(4/8)] = 1/6 The probabilty of only having 1 man out of 3 (this is probably the trickiest part) is: If man is chosen first:[(4/10)+(6/9)+(...
- by ssy
Mon Sep 22, 2008 1:20 am- Forum: Problem Solving
- Topic: Probability Problem
- Replies: 10
- Views: 3242
How to use set formulas?
I've just come across these set formulas in past posts. Can someone please explain the difference between these 2 formulas (if there is a difference) and how to use them? Is this all or are there more set formulas which would be helpful? Total = Group1 + Group2 + Group3 - (sum of 2-group overlaps) -...
- by ssy
Mon Sep 22, 2008 12:33 am- Forum: GMAT Math
- Topic: How to use set formulas?
- Replies: 0
- Views: 3234
The question asks you to define how the argument proceeds. The argument proceeds with the sentence - "Adam Smith, the economist who first articulated the principles of free trade, held that any obstacle placed in the way of the free movement of goods, investment, or labor would defeat free trad...
- by ssy
Sun Sep 21, 2008 11:50 pm- Forum: Critical Reasoning
- Topic: test 128
- Replies: 4
- Views: 1886
For the first question: (Average weight)(No. of Boxes) = Total weight of boxes. Hence, the total weight of the 3 boxes is 7kg x 3 = 21kg. As there are 3 boxes, we know that the middle box weighs 9kg and one box weighs less than 9kg while the other box is equal to or weighs more than 9kg. The total w...
- by ssy
Sun Sep 21, 2008 11:24 pm- Forum: Problem Solving
- Topic: average
- Replies: 5
- Views: 6560