To achieve this, we can store the score of all the questions in the same custom variable for eg. Custom variable 1. Then, on the last question of the survey we can set the compound branching logic and based on the score stored in custom variable 1 we can update the range in another custom variable available. Please refer to the below help files and video link created for reference.
Video link: https://somup.com/cZhO0l5Eow
Section based scoring: https://www.questionpro.com/help/section-based-scoring.html
Compound branching: https://www.questionpro.com/help/compound-branching-new.html
Can I display different range of scores on exit or thank you page?
Why are the scores displayed with decimal points? Is it possible to show whole numbers instead?