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35^7/5^77
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12 Nov 2020, 10:52
12 Nov 2020, 10:52
Expert Reply
00:00
Question Stats:
88% (00:29) correct
11% (00:34) wrong based on 72 sessions
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Quantity A |
Quantity B |
\(\frac{35^7}{5^{77}}\) |
\(\frac{7^7}{5^{70}}\) |
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.
Source: 320 GRE Math Questions
Re: 35^7/5^77
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12 Nov 2020, 14:30
12 Nov 2020, 14:30
1
Carcass wrote:
Quantity A |
Quantity B |
\(\frac{35^7}{5^{77}}\) |
\(\frac{7^7}{5^{70}}\) |
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.
Source: 320 GRE Math Questions
35^7/5^77 = (5^7)(7^7)/5^77, which simplifies to 7^7/5^70. The correct answer is C.
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Re: 35^7/5^77
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14 Nov 2020, 06:34
14 Nov 2020, 06:34
2
Carcass wrote:
Quantity A |
Quantity B |
\(\frac{35^7}{5^{77}}\) |
\(\frac{7^7}{5^{70}}\) |
We can solve this question using matching operations (my favorite Quantitative Comparison strategy)
Given:
Quantity A: \(\frac{35^7}{5^{77}}\)
Quantity B: \(\frac{7^7}{5^{70}}\)
Multiply both quantities by \(5^{77}\) to get:
Quantity A: \(35^7\)
Quantity B: \(\frac{(7^7)(5^{77})}{5^{70}}\)
Simplify Quantity B to get:
Quantity A: \(35^7\)
Quantity B: \((7^7)(5^7)\)
Useful property: \((x^n)(y^n)=(xy)^n\)
When we apply this property to Quantity B we get:
Quantity A: \(35^7\)
Quantity B: \(35^7\)
Answer: C
Cheers,
Brent
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