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80 is divisible by 2^x.
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25 Aug 2018, 14:59
25 Aug 2018, 14:59
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80 is divisible by \(2^x\).
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.
Quantity A |
Quantity B |
x |
3 |
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.
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Re: 80 is divisible by 2^x.
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12 Nov 2018, 08:47
12 Nov 2018, 08:47
sandy wrote:
80 is divisible by \(2^x\).
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.
Quantity A |
Quantity B |
x |
3 |
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.
Let's test some values....
Case #1
If 80 is divisible by 2^x, then it COULD be the case that x = 3, since 2^3 = 8, and 80 is divisible by 8
So, we get:
QUANTITY A: 3
QUANTITY B: 3
In this case, the quantities are EQUAL
Case #2
If 80 is divisible by 2^x, then it COULD be the case that x = 2, since 2^2 = 4, and 80 is divisible by 4
So, we get:
QUANTITY A: 2
QUANTITY B: 3
In this case, Quantity B IS GREATER
Answer: D
Cheers,
Brent
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Joined: 07 Aug 2016
Posts: 59
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GRE 1: Q166 V156
Re: 80 is divisible by 2^x.
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19 Nov 2018, 16:40
19 Nov 2018, 16:40
1
x could be 0,1,2, or 3
If x = 0 the. 2^0 = 1
80/1 = 80
0 < 3
However, if x = 3 then 2^3 = 8
80/8 is divisible.
Yet 3 = 3 so getting two different answers means we get answer choice D
If x = 0 the. 2^0 = 1
80/1 = 80
0 < 3
However, if x = 3 then 2^3 = 8
80/8 is divisible.
Yet 3 = 3 so getting two different answers means we get answer choice D
