I didn't really study for the maths part as I was already confident in my maths but you should be able to comprehend word problems and understand them. In a couple questions I had to construct equations but there was also geometry, statistics etc. For me the maths also had a lot of science so make sure you would want just know basic concepts. One question involved how objects behave in space and another question had the different types of energy. I think you just need critical thinking skills and being confident in applying what you're given. For writing, you should read exemplars for both discursives and creatives. Afterwards, you'll want to just practice writing them under timed conditions with prompts and reviewing how you can improve. I would recommend taking a couple minutes to plan your response as the quality and how it relates to the prompt is very important.
