Unfortunantly I cannot remember anything specific. Headphone mental arithmetic was very difficult though because the timing was very limited around 10-15 secs/ I found out that similar arithmetic qu in the test were much easier to solve. It is much harder to solve these qu if you cannot see them on the screen. There were many questions based on percentages and multiplication. If anybody has passed the first stage, it would be appreciated if they could give us some feedback on headphone mental arithmetic.