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Re: Inequality Problem [#permalink]
01 Oct 2010, 07:46

shrouded1 wrote:

Michmax3 wrote:

Is x-y+1 greater than x+y-1

1) x>0 2) y<0

x-y+1 > x+y-1 1-y > y-1 2y < 2 y < 1

1) does not talk about x. Insufficient 2) implies y<1. Sufficient

Answer : b

Morning!

I'm just beginning to study for the GMAT and have a very weak quant background. I answered this question correctly but it took me 5 minutes to do so. I need to find ways to save time, could you explain to me why you noted that "1) does not talk about x. Insufficient" ? It seems like you removed choice A quickly.

This is probably a terribly novice question but I'm a novice so, I hope you don't mind!

Re: Inequality Problem [#permalink]
01 Oct 2010, 08:10

1

This post received KUDOS

fronds wrote:

shrouded1 wrote:

Michmax3 wrote:

Is x-y+1 greater than x+y-1

1) x>0 2) y<0

x-y+1 > x+y-1 1-y > y-1 2y < 2 y < 1

1) does not talk about x. Insufficient 2) implies y<1. Sufficient

Answer : b

Morning!

I'm just beginning to study for the GMAT and have a very weak quant background. I answered this question correctly but it took me 5 minutes to do so. I need to find ways to save time, could you explain to me why you noted that "1) does not talk about x. Insufficient" ? It seems like you removed choice A quickly.

This is probably a terribly novice question but I'm a novice so, I hope you don't mind!

Cheers, f

After manipulating the question stem (subtracting x on both sides) we are only left with y to determine...since Statement 1 gives x but says nothing about y, which is what we are looking for it is immediately insufficient _________________

Re: Inequality Problem [#permalink]
01 Oct 2010, 09:06

Michmax3 wrote:

After manipulating the question stem (subtracting x on both sides) we are only left with y to determine...since Statement 1 gives x but says nothing about y, which is what we are looking for it is immediately insufficient

Ah, I see that now. I need to notice the significance of things like this more quickly. Thank you for the answer.

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