What results in math (average, ease, difficulty, etc.)?
I must admit that it seems very tense to me because at UCL, there is a certain specialization in science (at least the baccalaureate) unlike at UNamur for example.
To accumulate shortcomings in two of the key elements of the program, which are already far from obvious for those who do not have them, is quite clearly a headache.
So what I would advise you if you are determined to become a management engineer,
It’s to do a 7th math-science because anyway with your background, you would have certainly missed a year and often much more.