United Kingdom School Admission test?

Hello guys, In a few weeks time i am moving to Uk, Most probably Reading or london. Can you guys help me in finding how the schools work over there and how the subjects are provided. I need to know whether i can practice sample Mathematics papers which come in the admission test. Also i wanted to know what are the standards of math like the level of difficulty level. Please help me i need to practice my maths. (for class 9) Like i am going to give the entry test for class 9.

If you are going to an ordinary state comprehensive, there will not be an entrance test.

If you want to go to a selective school, then each school will have a different exam. If you go to the websites for the schools you are applying for, you should find details of the exam papers they use.