In the fourth question, you arrived at the conclusion that x > y after statement 1. How did you arrive at the conclusion? Cannot understand. If we take x = -2, then why would be -2 +0.5 = -1.5 In this case x < y. Let me know if i have understood something wrong?
@Rajanya Dey, U targeted the explanation instead of targetting the question, the explanation is faulty and not valid for -3, -1 .... Let's put it this way, since xy
The problem with question no. 3 is that the first statement says (x+y)^2 = 9a , and this is sufficient to answer since for this statement the value of x^2 + y^2 will never come down below 4.5a ........... U can take any values of positive x and y (or both negative) and try it as he said... A separate inequation exists proving this : (x - y)^2 = x^2 - 2xy + y^2 >=0, and we have x^2 + y^2 >= 2xy.
thats because we cannot multiply or divide by y , cause we can only do that operation with positive numbers , we dont know if y was positive , hope that helps
Hi , i have a small correction that i would like to state , The reason that we cannot cut off y , is because there is a small chance that y can be 0 , so imagine this , if ab=bc ,so here it does not mean that we can cut off b and a =c . because if b=0 and a =4 and c =10 then 0=0, so that doesnt mean that a=c all the time and we can cut off b from both sides so , when ab=bc it means , ab-bc=0, which leads to b(a-c)=0 , and this means either b=0 or a=c
![Mastering the GMAT Remainder Concepts in Number System [Webinar]](/img/n.gif)
I believe the exercise on minute 18:00 the answer was supposed to be C. I think you just got the answer choices mixed up
Yes yes ! C
you are right , answer is C
The one and the only channel on UA-cam with no bullshit only study. And infact one of the most oldest channel.
Thank you!
At 18:11, I guess the answer should be 'C'
Srijona Bhadra yes absolutely.
Great video, was really helpful and each question was a great choice, thank you
11:30- Great Question to revise (watch till the end for the final trap)
In the fourth question, you arrived at the conclusion that x > y after statement 1. How did you arrive at the conclusion?
Cannot understand. If we take x = -2, then why would be -2 +0.5 = -1.5 In this case x < y. Let me know if i have understood something wrong?
In 23:36 , what if x= -2 and y is also equal to - 2. Then how can we say for sure that they have different signs? What if x = -3 and y = -1?
By the first statement, xy < 0 , so either x or y must be negative but they can't both be negative.
@Rajanya Dey, U targeted the explanation instead of targetting the question, the explanation is faulty and not valid for -3, -1 .... Let's put it this way, since xy
At 8:21 Ques 2. If we have taken x< 0 , then why isn't it y= -x -x = -2x? why didn't we consider other x to be negative too?? Please clarify and help.
Absolute value is always positive
Isn't the answer to q3, C? 5a>4a. The question does not ask if 5a>4. Please clarify.
The answer to question no.2 should be A?
Thank you very much. Great video
The problem with question no. 3 is that the first statement says (x+y)^2 = 9a , and this is sufficient to answer since for this statement the value of x^2 + y^2 will never come down below 4.5a ........... U can take any values of positive x and y (or both negative) and try it as he said... A separate inequation exists proving this : (x - y)^2 = x^2 - 2xy + y^2 >=0, and we have x^2 + y^2 >= 2xy.
thanks really useful
In the 1st Question, why y can't be destroyed ?
thats because we cannot multiply or divide by y , cause we can only do that operation with positive numbers , we dont know if y was positive , hope that helps
@@helpinghands9485 Thanks for this answer, I have the same doubt.
Hi , i have a small correction that i would like to state , The reason that we cannot cut off y , is because there is a small chance that y can be 0 , so imagine this , if ab=bc ,so here it does not mean that we can cut off b and a =c . because if b=0 and a =4 and c =10 then 0=0, so that doesnt mean that a=c all the time and we can cut off b from both sides so , when ab=bc it means , ab-bc=0, which leads to b(a-c)=0 , and this means either b=0 or a=c
Great stuff, appreciate for sharing, just the last question could've been a bit more explicit.
Thanks :) Loved it :D