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# a and b are integers greater than zero.

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Founder
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a and b are integers greater than zero. [#permalink]  18 Sep 2018, 10:35
Expert's post
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Question Stats:

86% (00:20) correct 13% (00:30) wrong based on 59 sessions
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Re: a and b are integers greater than zero. [#permalink]  18 Sep 2018, 21:16
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Take a=b=1 qty A and qty B will be equal.
Take a=2, b=1 qty A < qty B
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GRE Instructor
Joined: 10 Apr 2015
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Kudos [?]: 4782 [2] , given: 70

Re: a and b are integers greater than zero. [#permalink]  21 Aug 2020, 06:34
2
KUDOS
Expert's post
Carcass wrote:

a and b are integers greater than zero.

 Quantity A Quantity B $$\frac{a}{b}$$ $$a^2$$

Another approach is to use matching operations (my favorite Quantitative Comparison strategy)

Given:
Quantity A: a/b
Quantity B: a²

Since we're told b is POSITIVE, we can safely multiply both quantities by b to get:
Quantity A: a
Quantity B: a²b

Since we're told a is POSITIVE, we can safely divide both quantities by a to get:
Quantity A: 1
Quantity B: ab

At this point we can see that...
- if a = 1 and b = 1, but then the two quantities are equal
- if a = 2 and b = 2, but then Quantity B is greater

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Brent Hanneson – Creator of greenlighttestprep.com

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Re: a and b are integers greater than zero. [#permalink]  21 Aug 2020, 06:50
2
KUDOS
GreenlightTestPrep wrote:

Another approach is to use matching operations (my favorite Quantitative Comparison strategy)

Given:
Quantity A: a/b
Quantity B: a²

Since we're told b is POSITIVE, we can safely multiply both quantities by b to get:
Quantity A: a
Quantity B: a²b

Since we're told a is POSITIVE, we can safely divide both quantities by a to get:
Quantity A: 1
Quantity B: ab

At this point we can see that...
- if a = 0.5 and b = 0.5, but then Quantity A is greater
- if a = 2 and b = 2, but then Quantity B is greater

Even though the answer is right, we shouldn't plug-in decimals, since we have the condition that $$a$$ and $$b$$ are integers.
GRE Instructor
Joined: 10 Apr 2015
Posts: 3915
Followers: 165

Kudos [?]: 4782 [0], given: 70

Re: a and b are integers greater than zero. [#permalink]  21 Aug 2020, 06:54
Expert's post
Even though the answer is right, we shouldn't plug-in decimals, since we have the condition that $$a$$ and $$b$$ are integers.

Good point!
I edited my solution so that we test a = 1 and b = 1 instead.

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Brent Hanneson – Creator of greenlighttestprep.com

Re: a and b are integers greater than zero.   [#permalink] 21 Aug 2020, 06:54
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