If I have checkbox answers, can I score the answers that are given? For example, if an answer presents a high risk it gets a 10 and if it is low risk it gets a 1.
These would then be collated on a page by page basis.
The respondent does not need to see the results.
Is the only way of doing this via a quiz?
Yes, this should be possible with the use of a Quiz (specifically a Tally Quiz). A tally quiz allows you to assign a value to each answer option (as you have described).
Here is some documentation on this:
Hope this is what you are looking for!