StudyKing heyyy the science was pretty much like the icas test but a lot easier, just make sure to have decent observation and reasoning skills, science puzzles/practise papers should prepare you for that , do prepare for the writings and have a semi-broad scientific knowledge spectrum and make sure to have solid reasoning to go with all the points you make in the writing piece. They had this list of what to include for the experimental one, which was pretty helpful. The maths and numerical reasoning tests were also really descent covering mostly yr 9 topics, so no need to stress overly. And on a side note, please don't try to push yourself just because of family pressure, you would best suit the environment of JMSS if you genuinely wanna go there yourself, despite all the hype about 'selective and specialist' schools