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# GMAT: Data sufficiency 30

121-124, pg. 288. Created by Sal Khan.

## Want to join the conversation?

• Question 123: Since Sal points out on statement number two, that knowing the coordinates of point Q we can tell tha OQ is 13, he's assuming that O has cordinates 0.0. Which leads to my question:
Can't statement number 1 be sufficient? Knowing the coordinates of point O and P I can calculate the lenght of OP. Using this info and the hight I can then calculate the area of the left portion of the triangle PNO (let's call PN the hight of the triangle). The area is 24.
Now, since we know OP<PQ, we know that the right half (PNQ) will have an area bigger than triangle PNO, whose area is 24. Which means that the two areas combined should be bigger than 48, which is exactly what the question is asking. Hope I was not too confusing!