People make such a big deal out of these small details. Cross out stuff. Who cares. They mark the first answer you provide (that’s not crossed out). Use a nice blue pen because it shows up well on the paper.
Write neatly and clearly. And in very short bullets. Make the grader’s life as easy as possible. If it gains you .5 marks from being clear and to the point, it might be the difference between a pass and fail.
Make sure you mark what question you are answering, such as:
(4)
(a) Yield is 5%.
(b) Jim’s investment horizon is 24.5 years.
(c) Answered in template.
Etc.