What is the best way to talk about the number points indicated in a test to give a note like 12/20 ? In France, we say "barème".
You can say:
- you got 12 marks out of a possible 20; or
- you got a score of 12 out of 20.
mark noun 3 British A point awarded for a correct answer or for proficiency in an examination or competition. ‘Students are awarded marks out of seven for each paper, and get a final overall score.’ ‘I know of a professor who was in the habit of deducting marks in examinations for bad spelling, poor grammar or clumsy sentences.’ - ODO
score noun 1.2 A rating or grade, such as a mark achieved in a test. ‘Test scores increase, reading levels rise, and teachers report fewer disciplinary problems.’ ‘Total the three scores on each line to get your totals.’ - ODO