noun, noun which may take the genitive case particle 'no'
perfect score; full marks; perfection
Used for a score of 100 out of 100, or metaphorically for something flawless.
He got a perfect score on the math test.
This cake is perfection.
grading out of a hundred; on a scale of 0 to 100
Refers to the grading system itself, where the maximum is 100 points.
This exam is graded out of a hundred.