It depends on what bank you apply for. I got an e in maths but the majority of the work is done on the computer which works it out for you. Normally, they will conduct a telephone interview first, with possibly a few simple maths questions and if you pass that, they will invite you for a face to face interview. Depending on what role you go for, you may need to do a role play. Remember, be bright and bubbly, lots of personality and lots of open questions. What they look for is how you conduct yourself and with others. Good luck!