I am not sure which questions you are referring to because there are two possibilities.
Firstly, I assume that you have download the free lecture notes, and I work through the examples that are in the lecture notes.
Secondly, we used to have a few test questions at the end of each chapter in the lecture notes. At the end of the lecture I work through some of these and I must remove them from the lecture. They are no longer in the lecture notes because instead we have online practice tests for each chapter which you can find linked from the main Paper F2 page. I am sorry about the confusion if it is these you are referring to – again, I will remove them from the lecture. (The online tests give the answers and full workings and so do not need lectures working through them).