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# If X is the length of the radius of a circle, what is X? 1. The radius

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Senior RC Moderator
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If X is the length of the radius of a circle, what is X? 1. The radius  [#permalink]

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16 Apr 2017, 13:04
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Difficulty:

5% (low)

Question Stats:

81% (00:55) correct 19% (00:49) wrong based on 99 sessions

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Source: McGraw Hill GMAT

If X is the length of the radius of a circle, what is X?

1. The radius is one-half the length of the diameter.
2. The ratio of the circumference to the diameter is π.

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Re: If X is the length of the radius of a circle, what is X? 1. The radius  [#permalink]

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08 Jun 2017, 11:13
I got a tad bit confused. First, the question is asking for a value for X.

The question stem provides the same information in the two statements. They are both facts- diameter by definition is 2*radius and the ratio of diameter to the circumference is 2πr: D(=2π). This does not give us a value for X, but where my confusion came in was the idea that a ratio would give us "a value" and that is not the case.

I chose E after going back and forth over the meaning of "value" and the implication of/what is a "ratio"- good question on foundational stuff.
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Re: If X is the length of the radius of a circle, what is X? 1. The radius  [#permalink]

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27 Jul 2017, 21:57
1
The answer is a straight E because it doesn't let us the value of the X because just by the ratio you cannot determine the particular value .
Intern
Status: Researching
Affiliations: NA
Joined: 03 Oct 2014
Posts: 27
Location: United States (CA)
Concentration: Nonprofit, General Management
GMAT 1: 460 Q14 V36
GMAT 2: 540 Q31 V34
GMAT 3: 610 Q36 V38
GMAT 4: 570 Q29 V40
GPA: 3.11
WE: Account Management (Non-Profit and Government)
Re: If X is the length of the radius of a circle, what is X? 1. The radius  [#permalink]

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27 Jul 2017, 22:20
longhaul123 wrote:
just by the ratio you cannot determine the particular value .
- yes thats something i totally overlooked when thinking out this question. thanks for pointing out for others as well.
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Re: If X is the length of the radius of a circle, what is X? 1. The radius   [#permalink] 27 Jul 2017, 22:20
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