GMAT Quantitative Reasoning Practice Test 8

Draw a guiding chart with three points on it.
Statement (1) tells us nothing about Blue town and so it’s insufficient.
Statement (2) tells us nothing about Greentown and so it’s insufficient on its own.
Even after you combine both statements, you don’t know if Red town is between both cities or not.
The distance from Greentown to Blue town can be 25 or 15 miles. More data is required.