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

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New post 16 Apr 2017, 13:04
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

78% (00:42) correct 22% (00:32) wrong based on 76 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.
[Reveal] Spoiler: OA

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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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New post 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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New post 27 Jul 2017, 21:57
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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 .

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GMAT 1: 460 Q14 V36
GMAT 2: 540 Q31 V34
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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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New post 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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