Harry,
When I did the tests in 2011, the numerical was purely mental arithmetic (25 questions in 12 minutes I think). Expect percentages, ratio, area, currency etc. Nothing taxing, just time pressured.
The verbal reasoning consisted of several obscure passages. There were a number of questions relating to each passage and you had to decide whether the answer was 'true, false or cannot say.' A little more time for this but more questions than in the numerical. From what I gather the current tests follow the same format.