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# Quant Question of the Day Chat

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Re: Quant Question of the Day Chat [#permalink]
devashish2407 wrote:
https://gmatclub.com/forum/for-integers ... 29065.html Can anyone help me with this question?

I think the answer should be A, however they say that’s incorrect.

b and d both are integers so both can only be equal to 1 or -1 if bd=1 so c=a, sufficient. However, b+d=3 is insufficient , we can check this with examples , b = 4 d =-1 , b+d =3 and b>d so c>a. But if b=1 and d=2, b+d = 3 but b<d so c<a. Please let me know if I missed something.
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Re: Quant Question of the Day Chat [#permalink]
devashish2407 wrote:
https://gmatclub.com/forum/for-integers ... 29065.html Can anyone help me with this question?

I think the answer should be E as both statement together doesnot give any concrete information about the relation between a and c even if we substitute the value of the respective numbers b and d

from (i) we get b = 1/d
or (b^2) = c/a (so we are not sure about the value of c/a which could be a fraction or a whole number (NOT sufficient)
from. (ii) we get b = 3-d
on substituting we get c/a = d/(3-d) which also doesn’t give a concrete value as the value of d is decisive (NOT sufficient)

On combining both we cannot find any exact value of d which could suffice a single condition

therefore both together not sufficient (E) should be the answer
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Re: Quant Question of the Day Chat [#permalink]
but the question mentions that it is an integer

so it cannot be a fraction
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Re: Quant Question of the Day Chat [#permalink]
The answer to above question is E only as correctly described by u guys.

I have a generic question. Is there any relationship between AM, GM, HM, mean and median?

U can decide the case/ situation and illustrate your opinion.
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Re: Quant Question of the Day Chat [#permalink]
Yes, we have many questions on relationships between mean and median

and mode even sometimes

depending on question, any kind of relationship can be drawn out, but I have attempted multiple questions with mean, median and mode, specially in D.S
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Re: Quant Question of the Day Chat [#permalink]
That’s great 👍. However, my question was on broader aspect.
Is there any relationship between AM GM HM mean and median

AM means arithmetic mean, G is geometric mean etc
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Re: Quant Question of the Day Chat [#permalink]
Harmonic Progression is rarely ever tested on GMAT, atleast I’ve not seen in over 2 years

One relation that comes to mind is, "If numbers are in AP, then Mean = Median"
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Re: Quant Question of the Day Chat [#permalink]
That is the one I was talking about too
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Re: Quant Question of the Day Chat [#permalink]
gmat_app1096 wrote:
Harmonic Progression is rarely ever tested on GMAT, atleast I’ve not seen in over 2 years

It is not tested. You do not need to know the concept of harmonic mean Based on the questions I have seen.

I stand corrected. Apparently the new gym has focus does test harmonic mean 🥴

the-harmonic-mean-of-n-numbers-is-the-reciprocal-of-the-arithmetic-416989.html

I stand corrected. GMAT focus tests harmonic mean - above is an example from GMAT prep.

As was pointed out, I also have not seen it brought up much in the past.
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Re: Quant Question of the Day Chat [#permalink]
How to solve these questions with common root
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Re: Quant Question of the Day Chat [#permalink]
Sidharth11 wrote:
How to solve these questions with common root

I got -1

E1) 3x^2 +ax +1=0
E2) 2 x^2 +bx +1=0

(E1 )- (E2) —-> x^2 +(a-b)x=0
—-> x=b-a
X found in (E1)
3(b-a)^2 + a(b-a) +1 =0
2a^2 -5ab+3b^2 +1= 0
2a^2 -5ab+3b^2 =-1
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Re: Quant Question of the Day Chat [#permalink]
Sunday GMAT Quiz Starts at 10:30am ET / 9pm IST - Solve 30 Challenging Questions with Peers in Timed Conditions redirect.php?id=4zcwm3aon1
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Re: Quant Question of the Day Chat [#permalink]
Hey will a recording be available of this
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Re: Quant Question of the Day Chat [#permalink]
This one is on Youtube. So, the video should be accessible at the same link post the live session.
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Re: Quant Question of the Day Chat [#permalink]
HarshR9 wrote:
This one is on Youtube. So, the video should be accessible at the same link post the live session.

not if they decide to make it private later
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Re: Quant Question of the Day Chat [#permalink]
Of course. Doesn’t typically happen though - making private is an exception rather than the rule, in this case (other such videos are still accessible).
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Re: Quant Question of the Day Chat [#permalink]