1. Dijkstra The start box doesn’t need zero in working values
The first method mark is for a smaller number replacing a larger number at least once in the main boxes. Miss that and lose all marks.
All boxes must be labelled. Miss a number out loses the whole mark for that box.
It’s safest to never write in larger values. If you do, they have to be in the right order. If any numbers are in the wrong order you lose the mark for that box. If you need more room list outside the box in a line.
If they ask you to ‘justify your answer’ they expect a full backread (not an essay) so:
T-H = 11
H-F = 35
F-E = 11 etc