GMAT Math : DSQ: Calculating the ratio of diameter and circumference
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Example Questions
Example Question #1 : Dsq: Calculating The Ratio Of Diameter And Circumference
Find circle 
I) The area of circle 
II) Chord 
Statement II is sufficient to answer the question, but statement I is not sufficient to answer the question.
Both statements are needed to answer the question.
Neither statement is sufficient to answer the question. More information is needed.
Statement I is sufficient to answer the question, but statement II is not sufficient to answer the question.
Either statement is sufficient to answer the question.
Either statement is sufficient to answer the question.
To find the ratio of diameter to circumference we need our diameter and circumference.
We can use I to find our radius and from there our diameter and circumference.
II can be used to make a triangle with sides of 
Either statement is sufficient to answer the question.
Example Question #2 : Dsq: Calculating The Ratio Of Diameter And Circumference
What is the ratio of the circumference to the diameter of Circle 
1.) The radius of the circle is 
2.) The area of the circle is 
Each statement alone is sufficient to solve the question.
Statement 1 is sufficient to solve the question, but Statement 2 is not sufficient to solve the question.
Neither statement is sufficient to solve the question. More information is needed.
Statement 2 is sufficient to solve the question, but Statement 1 is not sufficient to solve the question.
Both statements taken together are sufficient to solve the question.
Each statement alone is sufficient to solve the question.
We are asked to find the ratio of the circumference 
1.) The radius 
2.) The area 
Example Question #4 : Diameter
Circle A and circle B are given. If the diameter of circle B is 
- The circumference of circle A is
.
- The ratio of the diameters of circle A and circle B is
, respectively.
Statements 1 and 2 are not sufficient, and additional data is needed to answer the question.
Both statements taken together are sufficient to answer the question, but neither statement alone is sufficient.
Statement 2 alone is sufficient, but statement 1 alone is not sufficient to answer the question.
Each statement alone is sufficient to answer the question.
Statement 1 alone is sufficient, but statement 2 alone is not sufficient to answer the question.
Each statement alone is sufficient to answer the question.
Statement 1: If we know the circumference, we can calculate the diameter.
If 
Statement 2: We know the diameter of circle B is 
Example Question #4 : Dsq: Calculating The Ratio Of Diameter And Circumference
What is the diameter of the circle?
- The diameter to radius ratio is
.
- The circumference is
.
Both statements taken together are sufficient to answer the question, but neither statement alone is sufficient.
Statements 1 and 2 are not sufficient, and additional data is needed to answer the question.
Each statement alone is sufficient to answer the question.
Statement 1 alone is sufficient, but statement 2 alone is not sufficient to answer the question.
Statement 2 alone is sufficient, but statement 1 alone is not sufficient to answer the question.
Statement 2 alone is sufficient, but statement 1 alone is not sufficient to answer the question.
Statement 1: We're given a ratio (which you should already know) but no values. We need additional information to answer the question.
Statement 2: If we're given the circumference, we can solve for the diameter.
which means
Statement 2 alone is sufficient, but statement 1 alone is not sufficient to answer the question.
Example Question #5 : Dsq: Calculating The Ratio Of Diameter And Circumference
What is the circumference of the circle?
- The diameter of the circle is
.
- The area of the circle is
.
Statement 2 alone is sufficient, but statement 1 alone is not sufficient to answer the question.
Each statement alone is sufficient to answer the question.
Statement 1 alone is sufficient, but statement 2 alone is not sufficient to answer the question.
Both statements taken together are sufficient to answer the question, but neither statement alone is sufficient.
Statements 1 and 2 are not sufficient, and additional data is needed to answer the question.
Each statement alone is sufficient to answer the question.
Statement 1: We can calculate the circumference using the given diameter.
Statement 2: To find the circumference, we must first find the radius of the circle using the given area.
We can plug this value into the equation for circumference:
Each statement alone is sufficient to answer the question.
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