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Quantative Comparison Question- (30,000,000)(2,000,000)
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22 Apr 2015, 07:46
22 Apr 2015, 07:46
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Question Stats:
83% (00:22) correct
16% (00:25) wrong based on 143 sessions
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Question:
Quantity A: (30,000,000)(2,000,000)
Quantity B: (15,000,000)(4,000,000)
Quantity A: (30,000,000)(2,000,000)
Quantity B: (15,000,000)(4,000,000)
Show: ::
The GRE calculator will not be able to handle that many zeros.You will want to do this calculation by hand.To make things easier, you cancel as many zeros as you want, as long as you do the same operation to both sides.For instance, you could divide both sides by 1,000,000,000,000 Ju(Just think of this as 1 with 12 zeroes) to get:
Quantity A Quantity B
(30)(2) (15)(4)
Or, just use a bit of logic: 30 million times 2 million is 60 million million ,and 15 million tomes 4 is also 60 million,million
( "million million" is a trillion, but this doesn't matter as long as your sure that each Quantity will have the same number of zeroes.)
Quantity A Quantity B
(30)(2) (15)(4)
Or, just use a bit of logic: 30 million times 2 million is 60 million million ,and 15 million tomes 4 is also 60 million,million
( "million million" is a trillion, but this doesn't matter as long as your sure that each Quantity will have the same number of zeroes.)
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
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Re: Quantative Comparison Question
[#permalink]
22 Apr 2015, 14:06
22 Apr 2015, 14:06
1
Osira wrote:
Question:
Quantity A: (30,000,000)(2,000,000)
Quantity B: (15,000,000)(4,000,000)
Quantity A: (30,000,000)(2,000,000)
Quantity B: (15,000,000)(4,000,000)
One approach is to use the QC strategy of Matching Operations (for more on this useful strategy, see our free video: http://www.greenlighttestprep.com/module/gre-quantitative-comparison?id=1097)
First divide BOTH quantities by 15,000,000 to get:
Quantity A: (2)(2,000,000)
Quantity B: (1)(4,000,000)
Then divide BOTH quantities by 2,000,000 to get:
Quantity A: (2)(1)
Quantity B: (1)(2)
At this point, we can see that both quantities are EQUAL.
Answer:
Show: ::
C
Cheers,
Brent
Re: Quantative Comparison Question- (30,000,000)(2,000,000)
[#permalink]
11 Mar 2018, 06:35
11 Mar 2018, 06:35
1
Osira wrote:
Question:
Quantity A: (30,000,000)(2,000,000)
Quantity B: (15,000,000)(4,000,000)
Quantity A: (30,000,000)(2,000,000)
Quantity B: (15,000,000)(4,000,000)
Show: ::
The GRE calculator will not be able to handle that many zeros.You will want to do this calculation by hand.To make things easier, you cancel as many zeros as you want, as long as you do the same operation to both sides.For instance, you could divide both sides by 1,000,000,000,000 Ju(Just think of this as 1 with 12 zeroes) to get:
Quantity A Quantity B
(30)(2) (15)(4)
Or, just use a bit of logic: 30 million times 2 million is 60 million million ,and 15 million tomes 4 is also 60 million,million
( "million million" is a trillion, but this doesn't matter as long as your sure that each Quantity will have the same number of zeroes.)
Quantity A Quantity B
(30)(2) (15)(4)
Or, just use a bit of logic: 30 million times 2 million is 60 million million ,and 15 million tomes 4 is also 60 million,million
( "million million" is a trillion, but this doesn't matter as long as your sure that each Quantity will have the same number of zeroes.)
For this problem, let us simplify the stem.
For quant A, we can assume \(30*2*10^{12}\)
For qaunt B, we can assume \(15*4*10^{12}\)
then A=B
Ans C
