The hardest kind of math you will ever encounter is quadratic equations, which will occur in year 12 chemistry, which I'm pretty sure was taught in junior years, so shouldn't be too much of an issue even if you don't do maths as Masaken explained. Besides the quadratic part, those who don't do any maths may find converting between different rates difficult, whether it be the simple changing of units (e.g. L to mL, kL to mL (have not encountered, just an example of type), etc.) or the switching of the amount/amount (e.g. mols/g to g/L or mols/L (can't think of the more difficult ones where the conversions won't naturally occur just by doing the question)).