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Harisali
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Rusty with maths 30 May 2020, 03:39
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I have started with quants, and straight away went for Number properties MGMAT. I am able to grasp 60-70% of the content.

Is it the right approach?
Please guide and share source where I could practice Number properties specific questions?
My OG is on the way, may be once it is with me I will try questions there too.

Posted from my mobile device

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Rusty with maths 30 May 2020, 08:10
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You can use below link to practice more questions from the forum questions directory.

https://gmatclub.com/forum/search.php?view=search_tags
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Rusty with maths 30 May 2020, 08:17
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Going through the Manhattan prep strategy guides to master concepts for quant seems an excellent way to start. Then, you can practice a specific chapter from OGs with the timer at the GMAT Club and see the solution of experts. The link below must help you to find particular types of problems from diverse sources:

https://gmatclub.com/forum/search.php?view=search_tags
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Rusty with maths 30 May 2020, 08:40
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Yes that is probably the right way .good luck on your prep journey

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sachin91
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Rusty with maths 30 May 2020, 10:23
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Hi,

I am looking for a dedicated study buddy who is planning to take GMAT in July or August, and targeting a score of 750+.
If anyone is interested, please connect with me.

Thanks
Sachin

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AkankshaGMAT1989
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Rusty with maths 05 Jun 2020, 05:09
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Hi Bunuel and bb sir,

I need your help to solve the following equation. It is part of a larger DS question.

|X| + X^2 = 2X

My solution is:

If assume cases here:
1. |X| = X
then the equation becomes >>> X+X^2 =2X
=X^2 -X = 0

= X(X-1) = 0

2 possible values of X that are X=0 or X =1


Case 2: |X| = - X

now, LHS is -X + X^2

Should RHS also be -2X or it should remain +2X because the answer changes with this consideration.

Thanks in advance.
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Rusty with maths 05 Jun 2020, 05:50
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AkankshaGMAT1989
Hi Bunuel and bb sir,

I need your help to solve the following equation. It is part of a larger DS question.

|X| + X^2 = 2X

My solution is:

If assume cases here:
1. |X| = X
then the equation becomes >>> X+X^2 =2X
=X^2 -X = 0

= X(X-1) = 0

2 possible values of X that are X=0 or X =1


Case 2: |X| = - X

now, LHS is -X + X^2

Should RHS also be -2X or it should remain +2X because the answer changes with this consideration.

Thanks in advance.
Show more

You are replacing |x| with -x, when x < 0, but why should you replace x with -x? So, the answer to your question is NO.

|x| + x^2 = 2x

When x < 0, then |x| = -x, and in this case we'd get -x + x^2 = 2x, which gives x = 0 or x = 3. Discard both solutions because neither 0 nor 3 is in the range we consider (x < 0).

When x >= 0, then |x| = x, and in this case we'd get x + x^2 = 2x, which gives x = 0 or x = 1. Both solutions are valid because both 0 and 1 are in the range we consider (x >= 0).

So, |x| + x^2 = 2x has two solutions only x = 0 or x = 1.
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Rusty with maths 05 Jun 2020, 14:55
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Harisali
I have started with quants, and straight away went for Number properties MGMAT. I am able to grasp 60-70% of the content.

Is it the right approach?
Please guide and share source where I could practice Number properties specific questions?
My OG is on the way, may be once it is with me I will try questions there too.

Posted from my mobile device
Show more
You are on a right track . :thumbsup: :thumbsup: I would suggest to go-through the gmat club math book and ques from each topic from gmatclub to solidify your learning and application .

Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!