Today it's all about maths, as the competitors demonstrate extraordinary feats of written and mental arithmetic. There's additional twist to the first round of the day, as the competitor with the highest score will get a fast pass straight through to day 3, avoiding the day's challenging second round. The remaining 15 will have to take on one of the most complex recall rounds yet - memorising information relating to companies, sectors and share prices from FTSE 100 companies, as well as having to do complex calculations with the data.
