Well, as you know a number line is a line where you can place numbers with different spaces between them. It can be used to compare them in distance (the further apart they are on the line, the greater the difference between the two numbers)
Counterclockwise there are four 60 degree sections, therefore one would have to rotate the hexagon 240 degrees counterclockwise to map B to F. Final Answer: 240 degrees. Hope I helped :)