+---+ +---+ +---+ +---+ +---+ | 4 |-->| ● |-->| 9 |-->| ● |-->| 7 | +---+ +---+ +---+ +---+ +---+ ^ ^ ^ ^ ^ | | | | | +---+ +---+ +---+ +---+ +---+ | ● |-->| 7 |-->| ● |-->| 5 |-->| ● | +---+ +---+ +---+ +---+ +---+ ^ ^ ^ ^ ^ | | | | | +---+ +---+ +---+ +---+ +---+ | 5 |-->| ● |-->| 9 |-->| ● |-->| 4 | +---+ +---+ +---+ +---+ +---+ ^ ^ ^ ^ ^ | | | | | +---+ +---+ +---+ +---+ +---+ | ● |-->| 8 |-->| ● |-->| 6 |-->| ● | +---+ +---+ +---+ +---+ +---+ ^ ^ ^ ^ ^ | | | | | +---+ +---+ +---+ +---+ +---+ | 6 |-->| ● |-->| 8 |-->| ● |-->| 5 | +---+ +---+ +---+ +---+ +---+Move from the bottom left-hand 6 to the top right-hand 7 in the direction of the arrows, adding together all the five numbers .

Each black circle is worth minus 5 and this will be taken from the total each time you meet one.

How many different routes are there- each giving a total of 10 ?