For DS questions involving Geometry, there's a nice rule that says, "To find one length, we need at least one other length."
Since no lengths are provided in either statement, the answer must be E

If you're interested, we have a free video about Geometry DS questions here: https://www.gmatprepnow.com/module/gmat- ... cy?id=1103

Cheers,
Brent

gmattesttaker2 wrote: ↑

Wed Jul 04, 2012 10:36 am

This is from OG 10th Edition. Sorry, I dont have the OA

What is the radius of the circle below with Center O?

1) The ratio of OP to PQ is 1 to 2
2) P is the midpoint of chord AB

Solution:

Question Stem Analysis:

We need to determine the radius of circle O, i.e., the length of OQ.

Statement One Alone:

We see that OQ is 3 * OP. However, since we can’t determine the length of OP, we can’t determine the length of OQ. Statement one alone is not sufficient.

Statement Two Alone:

This just tells us that AP = PB and AB is perpendicular to OQ. It doesn’t allow us to determine the length of OQ. Statement two alone is not sufficient.

Statements One and Two Together:

With the two statements, we still can’t determine the length of OQ. We actually can’t even determine the length of any segment in the diagram, such as OP, PQ, AP, or BP. Both statements together are still not sufficient.

Answer: E