GMAT Data Sufficiency (DS) | Re: Is the standard deviation of a certain set...
Hello from the GMAT Club BumpBot!Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think...
View ArticleGMAT Problem Solving (PS) | Re: Last year, Christine received 12 monthly...
This one is ridiculously easy4(4500) + 8(4800)/12(18000 + 38400)/1256400/124700Answer is C
View ArticleGMAT Data Sufficiency (DS) | Re: If p and n are positive integers and p > n,...
tricky question!1) not enough data2) not enough data1+2) seems to be correct, but if we test different numbers like, let p+n=6, p-n=4, the remainder will be 9if we take other numbers p+n=21, p-n=6,...
View ArticleGMAT Data Sufficiency (DS) | Students in a class are arranged to form groups
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View ArticleGMAT Problem Solving (PS) | Re: If n is an integer and n^3 is divisible by...
BunuelShouldn't it be the smallest number rather than the largest number because we don't know if 2 and 3 are the ONLY prime factors of n?I am really confused with the term "largest number".Thanks
View ArticleGMAT Data Sufficiency (DS) | Re: If ax + b = 0, is x > 0 (1) a + b > 0 (2) a...
from the beginning we can make up an equation to x=-b/a1)a+b>0 or a-ax>0. a(1-x)>0 not enough data2) a-b>0 or a-ax>0. a(1+x)>0 not enough data1+2) let's sum the equation, because they...
View ArticleGMAT Problem Solving (PS) | Re: What is the greatest number of identical...
Bunuel wrote:Shiv2016 wrote:(Two bouquets are identical whenever the number of red tulips in the two bouquets is equal and the number of white tulips in the two bouquets is equal.)Can anyone please...
View ArticleGMAT Problem Solving (PS) | Re: If two of the four expressions x+y, x+5y,...
only 2 combination helps us get the answerwe can solve it in 2 ways: 1)a) we need x+y or x-y out of 4, then 2/4b) then we need either of them, so 1/3c)2/4*1/3=1/6Or let's us combinatoricsthere are...
View ArticleGMAT Problem Solving (PS) | Re: If the operation is defined for all integers...
I just picked random positive integers and started testing right away, all 3 worked for meThough time consuming, but one can arrive pretty quickly at 1,2. 3 took much more time
View ArticleGMAT Data Sufficiency (DS) | Re: If it took Carlos 1/2 hour to cycle from his...
from the data in the table let's find the border speed to evaluate: 6*5280/(30*60)=17,6If the average speed was above 17,6 then the distance was over 6 miles, and vice versa1) NS2) NS1+2) NS Answer is E
View ArticleGMAT Data Sufficiency (DS) | Re: In the figure shown, what is the value of x?
this was a devil for me!1) clearly NS2) same1+2) we see to many same equations, let's try them out: 180-90=R+Tx+y+z=180y+z=(180-R)/2+(180-T)/2x=180-((360-(R+T)/2)x=45Sufficient
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GMAT Problem Solving (PS) | Re: A and B are two printing machines, which can...
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View ArticleGMAT Data Sufficiency (DS) | Re: During a 40-mile trip, Marla traveled at an...
let's write down what the question asks and them make it up: we will get at (0,25y+40)/1,25x : 40/x or (0,25y+40)/1,25*40So we don't need x, but y1) NS2) S
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GMAT Problem Solving (PS) | Re: A and B are two laborers who have been given...
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GMAT Problem Solving (PS) | Re: A and B can complete a task in 20 days. B and...
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View ArticleGMAT Problem Solving (PS) | Re: If n denotes a number to the left of 0 on the...
I approached it this way:n is number to the left from 0n^2<1/100question asks 1/n-?so from the data we know that -1/10<n<1/10let's flip so -10>1/n>10As we know that n is to the left from...
View ArticleGMAT Data Sufficiency (DS) | Re: If x and y are positive integers, what is...
Yes, Thanks for video.
View ArticleGMAT Problem Solving (PS) | Re: Six machines, each working at the same...
speed time work6 machines 6x 12 1? ? 8 1As we know that machiens do the same work, we can say x=1, then they do 72, 72/8=9, 9-6=3 answer is 3
View ArticleGMAT Problem Solving (PS) | Re: Circular gears P and Q start rotating at the...
let's translate into seconds: P: 1/6 per secondQ: 2/3 per secondwe can make the following equation: P*S=Q*S-66=s(q-p)6=s*1/2s=12Answer is D
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GMAT Data Sufficiency (DS) | Re: If P = 177^x * 2487^y, where x and y are...
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