Have you read the info Manchester provides for candidates just like you? It's here:
https://www.manchester.ac.uk/study/undergraduate/courses/2022/12952/bsc-computer-science-with-an-integrated-foundation-year/application-and-selection/#course-profile . I ask because they specifically say it is an aptitude test, and not to revise for it.
They also say: "The assessment takes the form of an online, invigilated, multiple-choice test.
We do not suggest that applicants prepare specially for the assessment, and it's important to note that it is not an entrance exam. The assessment is designed to test an applicant's aptitude and give us a picture of their current level of understanding and knowledge in key areas of mathematics and physics."
Usually a Uni will hope to admit students who have an aptitude for the course and so will enjoy it and stick at it. Unis were told a while ago to sort out their drop-out rate so this may be part of their approach to that.
Sounds like it will be to your benefit too since you wouldn't want to be admitted to a course to which you are not suited. In terms of what they'll be looking for, students who can cope with maths, logic, and who think sequentially tend to do well and to suit this kind of course. If students are good at chess, music, classical languages etc these are signs of a logical thinker too. If you really want to do some prep, think about refreshing your maths, looking at some logic puzzles, or trying some algorithmic problems. Brilliant.org
https://brilliant.org/ is a really good site for that kind of practice. Look at their sections on Logic, CS, Maths and Algorithms. If you enjoy that kind of problems solving you're likely going for the right course.
Finally, they say the test is done over Zoom so do make sure you have it set up and you're familiar with its workings.
Good luck, try not to stress over it. And remember, there's always a B Plan.
