If I got a bad grade, do I have to put it on my CV?

Understandably, none of us would like to show results we are not pleased with, but there is no need to share results unless companies specifically ask you for them. Some financial roles will ask for mathematics grades taken at A Level or IB, these you will have to share with them. But for the most part, a general indication on your grades works fine; A*-C or 39 points.

Maarten Karremans