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40 percent of $ 250 [#permalink]
15 May 2018, 15:27
Expert's post
00:00
Question Stats:
92% (00:25) correct
7% (00:35) wrong based on 14 sessions
Quantity A
Quantity B
40 percent of $250
80 percent of $125
A)The quantity in Column A is greater. B)The quantity in Column B is greater. C)The two quantities are equal. D)The relationship cannot be determined from the information given.
Re: 40 percent of $ 250 [#permalink]
17 May 2018, 06:38
1
This post received KUDOS
Expert's post
Carcass wrote:
Quantity A
Quantity B
40 percent of $250
80 percent of $125
A)The quantity in Column A is greater. B)The quantity in Column B is greater. C)The two quantities are equal. D)The relationship cannot be determined from the information given.
We can write: Quantity A: (0.4)(250) Quantity B: (0.8)(125)
Before you resort to using the GRE's onscreen calculator, you might see that we can quickly answer this question using a technique called "Multiplying by Doubling and Halving" The idea with this premise that: AB = (2A)(B/2) For example: (4.5)(6) = (9)(3) [we doubled the 4.5 and we halved the 6]
Using this same technique, we can see that (0.4)(250) = (0.8)(125)[we doubled the 0.4 and we halved the 250]
We now have: Quantity A: (0.8)(125) Quantity B: (0.8)(125)
Answer: C
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Re: 40 percent of $ 250
[#permalink]
17 May 2018, 06:38
close
92% (00:25) correct
