I just did the GMAT Focus Edition Mock exam 4 and spent 7 minutes on this question in the Data Insights section and I swear there is a mistake...?
The straight-line distance between Town A and Town B is 15 km. Most travelers passing through the towns, however, use two highways-first traveling × km west from Town A on one highway and then traveling y km north to Town B on a different highway. The intersection of these highways is farther from Town A than Town B.
Select values for x and for y that are jointly consistent with the given information. Make only two selections, one in each column.
The values in each column for x and y are: (5, 8, 9, 10, 13)
My score report said the correct anwer is x=13 and y=9.