The rests for Pharmacy are FAR more straightforward than for Med - apart from for UCL which now seems to have made applying for MPharm ludicrously complicated and stressful.
The maths test will be something really simple like a dosage calculation.
The maths is not difficult bit its also testing 'can you do this quickly when you are under ressure'.
All interviews will include a questions that tests your understanding of ethics, confidentially, communication skills etc.
Its mostly essential common-sense and 'how would I want to be treated', and is usually not 'difficult'. Its worth having a look at any info you can find about 'underage contraception' and respecting a person’s privacy and confidentiality, and 'data privacy'.