MAKE IT funnY!!! please!?

Question

Ok so i have this theater presentation, and one of the scenes is about my mom and showing her a test paper of 90%. She asks where the other 10 points went. (Its a typical Indian mother thing). How would I turn this in to comedy? Please serious answers only

Answer 1

You could continue it like this:

You: Remember that test question I asked you about when I was revising?
Mother: Silly girl, I told you what the right answer was!
You: I told them your right answer too, that's the only question I got wrong.

Answer 2

Your friend only had 80 and you let her/him borrow them.