My memory of that interview is a bit foggy, but here goes.
What is actuarial studies?
Why do you want to do actuarial studies?
What will you do if you miss out?
What sort of leadership roles have you done?
Recount a situation where you used those skills to resolve a conflict.
Name a situation where you improved efficiency using organisational skills (~somthing like that).
They often have a common question for everyone. For us it was 'how many people do you think are born every year in Australia? State your reasoning.'