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Quote:

GMAT Study Session I
Monday 11 May • 9:50 – 10:50 pm
Google Meet joining info
Video call link: https://meet.google.com/ipo-ebot-vhv
Or dial: +1 914-893-5989 PIN: 258 372 696#
What's the agenda?
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Quote:

GMAT Study Session I
Monday 11 May • 9:50 – 10:50 pm
Google Meet joining info
Video call link: https://meet.google.com/ipo-ebot-vhv
Or dial: +1 914-893-5989 PIN: 258 372 696#
what are we doing today? like which topic?

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what are we doing today? like which topic?
I was thinking if we can solve hard questions together?
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WA@boj6690

anyone up for this? i am confused about how to approach
N^2 + N^3 = N^2(1+N)

N^2 will always be a perfect square so you only have to ensure that 1+N is a perfect square

So numbers like 3,8,15,24,35,48...
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WA@boj6690

anyone up for this? i am confused about how to approach

Check here: https://gmatclub.com/forum/how-many-int ... 91732.html
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WA@boj6690
this part i didn’t understood actually, N^2 will be perfect square but how we reached to this number is the doubt
The questions asks us that the sum of N^2 + N^3 is a perfect square.
So assume the result to be X^2.
This gives us X = (N^2 + N^3)^0.5 = ((N^2)(1+N))^0.5 = N times (N+1)^0.5.

Now for X to be a perfect square we just need to make N+1 to be a perfect square so that we can get rid of the square root sign from the expression of X
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WA@boj6690
this part i didn’t understood actually, N^2 will be perfect square but how we reached to this number is the doubt
How we reached to numbers 3,8, 15 etc.? You need to know square numbers of approx first 20 whole numbers. Just subtract 1 from square numbers of 2 to 10
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guys anyone interested in solving 20 quant questions quiz together? with a timer of 2.5 minutes each question

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guys anyone interested in solving 20 quant questions quiz together? with a timer of 2.5 minutes each question
I am about to start, dm me if someone is interested
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RohanNewDelhi
I am about to start, dm me if someone is interested
+1
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If you are getting A, that means you are correct. So, what's the issue?
3 is not correct

Answer is B

3-6 = 7
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:)..should be 9-3. Was doing this in a hurry while traveling. You are right. It should be 9-6
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