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Compare Quantities A & B - 5X*3 and (5x)"3 (From Ready4GRE)
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Updated on: 23 Aug 2017, 07:14
Updated on: 23 Aug 2017, 07:14
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Question Stats:
50% (00:39) correct
50% (00:25) wrong based on 10 sessions
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Hi,
This is a bit confusing. Can someone please explain this to me?
A. Quantity A is greater.
B. Quantity B is greater.
C. The two quantities are equal.
D. The relationship cannot be determined from the information given.
This is a bit confusing. Can someone please explain this to me?
Quantity A |
Quantity B |
\(5x^3\) |
\((5x)^3\) |
A. Quantity A is greater.
B. Quantity B is greater.
C. The two quantities are equal.
D. The relationship cannot be determined from the information given.
Originally posted by leonidbasin1 on 02 Feb 2017, 12:16.
Last edited by mpmbtr on 23 Aug 2017, 07:14, edited 2 times in total.
Last edited by mpmbtr on 23 Aug 2017, 07:14, edited 2 times in total.
Edited by carcass
Re: Compare Quantities A & B - 5X*3 and (5x)"3 (From Ready4GRE)
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02 Feb 2017, 18:23
02 Feb 2017, 18:23
2
Expert Reply
Quantity A - \(5x^3\)
Quantity B - \((5x)^3\)
Since nothing is mentioned about x. Put x =0 and X=1.
When x =0 Quantity A = Quantity B = 0 C should be correct.
When x=1 Quantity A=5 and Quantity B = 125 B should be correct..
Thus clearly the option that is correct is D.
Quantity B - \((5x)^3\)
Since nothing is mentioned about x. Put x =0 and X=1.
When x =0 Quantity A = Quantity B = 0 C should be correct.
When x=1 Quantity A=5 and Quantity B = 125 B should be correct..
Thus clearly the option that is correct is D.
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Re: Compare Quantities A & B - 5X*3 and (5x)"3 (From Ready4GRE)
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23 Mar 2021, 04:54
23 Mar 2021, 04:54
1
leonidbasin1 wrote:
Quantity A |
Quantity B |
\(5x^3\) |
\((5x)^3\) |
We can solve this question using matching operations (my favorite Quantitative Comparison strategy)
Given:
Quantity A: \(5x^3\)
Quantity B: \((5x)^3\)
Expand Quantity B to get:
Quantity A: \(5x^3\)
Quantity B: \(125x^3\)
Subtract \(5x^3\) from both quantities to get:
Quantity A: \(0\)
Quantity B: \(120x^3\)
At this point, we can see that,...
If x = 0, the two quantities are equal
If x = 1, Quantity B is greater
If x = -1, Quantity A is greater
Answer: D
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