GMAT Data Sufficiency (DS) | Re: If x and y are positive integers, what is...
Bumping for review and further discussion.
View ArticleGMAT Quantitative Section | Re: Question bank and formulas- sheet
nice...... looks good
View ArticleGMAT Data Sufficiency (DS) | Re: If x is an integer, how many even numbers...
Bumping for review and further discussion.
View ArticleGMAT Problem Solving (PS) | Re: If x=-|x|, then which one of the following...
If x = - |x| , then which one of the following statements could be true?x = - |x|0 = - |0|0 = - 00 = 0VALIDx = - |x| -1 = - |-1|-1 = -(1)-1=-1VALIDx = - |x| 1 = - |1|1 = -(1)1 = -1INVALIDI. x = 0II. x...
View ArticleGMAT Problem Solving (PS) | Re: There are 3 red chips and 2 blue ones. When...
Maxirosario2012 wrote:My answer:C^5_2 * C^3_3 = 10The 2 blue placed from the slot 1 to 5 and the remaining 3 placed in the rest 3 slots. Discussed here: m09-72702.htmlQuestions to...
View ArticleGMAT Problem Solving (PS) | Re: If |10y-4| > 7 and y < 1, which of the...
If |10y - 4| > 7 and y < 1, which of the following could be y?|10y - 4| > 7 |10(-.8) - 4| > 7|-8-4| > 7|-12| > 7|12| > 712 > 7(A)
View ArticleGMAT Problem Solving (PS) | Re: If x + |x| + y = 7 and x + |y| - y =6 , then...
If x + |x| + y = 7 and x + |y| - y =6 , then x + y =x>0, y>0x + (x) + y = 72x+y=7x + |y| - y = 6x + y - y = 6x=62x+y=72(6)+y=7y=-5INVALID as 6>0 but -5 is not > 0x>0, y<0x + (x) + y =...
View ArticleGMAT Problem Solving (PS) | Re: For how many ordered pairs (x, y) that are...
2x+y=12|y|<=12For how many ordered pairs (x, y) that are solutions of the system above are x and y both integers?y=12-2x|y|<=12|12-2x| <= 1212 - 2x <= 12-2x <= 0x>=0-(12-2x) <=...
View ArticleGMAT Problem Solving (PS) | Re: For any non-zero a and b that satisfy |ab| =...
For any non-zero a and b that satisfy |ab| = ab and |a| = -a, |b-4| + |ab-b| =|ab| = ab and |a| = -a, |b-4| + |ab-b| =From |a| = -a we get that a is negative because:|a| = -a and -a must be positive...
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GMAT Data Sufficiency (DS) | Re: In the rectangular coordinate system above,...
Bunuel wrote:Mountain14 wrote:Bunuel wrote:In the rectangular coordinate system above, if OP < PQ, is the area of region OPQ greater than 48 ? (1) The coordinates of point P are (6,8). Now, if OP...
View ArticleGMAT Quantitative Section | DS: What do you write down while solving?
I was just wondering what process other people use while solving DS problems.I've found that about 95% of the time all I end up writing down isADBCEand cross off letters using the process described in...
View ArticleGMAT Problem Solving (PS) | Re: If |a+b|=|a-b|, then a*b must be equal to:
If |a+b|=|a-b|, then a*b must be equal to:|a+b|=|a-b|(a+b)*(a+b) = (a-b)*(a-b)a^2+2ab+b^2 = a^2-2ab+b^24ab=0In other words, a or b must = 0, therefore, the product of a*b is 0 regardless of what a or b...
View ArticleGMAT Problem Solving (PS) | Re: Find the value of
Luckily for us, every value here is the square root of a square so we can take the absolute value of each one:What is the value of: |1+a |+ |a-1| / |1+a| - |a-1| for 0<a<1lets try plugging in a...
View ArticleGMAT Problem Solving (PS) | Re: A sequence, a1=64, a2=66, a3=67, an=8+an-3,...
Here is my idea:a1 = 64 = 8*8= 8*k1a4 = a1 +8 = 8*8 +8 = 8*k4a7 = a4 +8 = 8*k4 + 8 = 8*k7...a(n)=8*k(n)Similarly,a(2)=66 = 8*k1 +2 -> a(2)-2 = 8*k(1)a(5)-2 = [a(2) - 2] + 8 = 8*k(1) +8 =...
View ArticleGMAT Problem Solving (PS) | Re: If f(x)= |4x - 1| + |x-3| + |x + 1| (Question...
Here is my idea:f(x) = f1(x) + f2(x) + f3(x)with all the functions are first-order ones.Suppose that: f1(x1)=0 --> x1=1/4f2(x2)=0 --> x2=3f3(x3)=0 --> x3=-1Always does f(x) reach its minimum...
View ArticleGMAT Problem Solving (PS) | Re: Which of the following represents the...
Which of the following represents the complete range of x over which x^3 – 4x^5 < 0?x^3 – 4x^5 < 0x^3(1-4x^2) < 0(1-4x^2) < 01 < 4x^2√1 < √4x^2(when you take the square root of 4x^2...
View ArticleGMAT Problem Solving (PS) | Re: For how many different positive integers n is...
n^3 + 8 = (n+2)(n^2-2n+4)--> 2 divisors possible, plus 1 and nwe have 4 divisors.
View ArticleGMAT Data Sufficiency (DS) | Re: What is the probability that rs=r?
Countdown wrote:Bunuel wrote:Sets R and S each contain three distinct positive integers. If integer r is randomly selected from R and integer s is randomly selected from S, what is the probability...
View ArticleGMAT Problem Solving (PS) | Re: A gumball machine contains...
elementbrdr wrote:Bunuel wrote:jordanshl wrote:A gumball machine contains 7 blue, 5 green, and 4 red gumballs - identical besides colour. If the machine disperses 3 gumballs at random, what is the...
View ArticleGMAT Quantitative Section | Re: My comprehensive Quant Flashcards!
Thank u very much. It is very useful for me ^^
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