Load a hidden equation type question with the assessments score and then use relevance based on that question to control the survey flow and/or show a "score" report.
- manual.limesurvey.org/Question_type_-_Equation
- manual.limesurvey.org/Expression_Manager#Access_to_Variables
- manual.limesurvey.org/Question_type_-_Equation
- manual.limesurvey.org/Expression_Manager#Access_to_Variables