Readme last updated 6 December 2019. In this folder there are many old LA1 and LA2 exams with solutions. More will be added in time. Not all exams have solutions, because I like to have some available for practising in class. LA1 exams with solutions: 2018 exam 2018 retake 2017 exam 2017 retake LA2 exams with solutions (some solution sets also cover the corresponding `LAB' exam, but the questions are a subset): 2017 retake 2016 exam 2016 retake 2018 exam 2018 retake 2019 exam 2019 retake Perhaps you have done all these, and still want more? If you look a bit more closely at the LAB exams, you will find they are the same as LA2 exams, except they have more questions. Therefore if you are studying for LA2 you also have (with solutions): 2015 exam 2014 exam 2014 retake 2014 exam (except Q5) 2014 retake (exact 9c) 2014I&E (except Q9, Q10) If you have done all the above and still feel insufficiently prepared there are very many additional practise questions in the textbook, half of which have solutions provided. If you have done all these, you can use the link on my homepage to a SAGE worksheet: https://cloud.sagemath.com/projects/01f9d031-1417-4d0c-92b0-caf1d9e7fff5/files/invertible%20integer%20matrix.sagews with which you can generate infinitely many additional practise exercises (at least, up to the bounds of currently-available computing power). If you have done all these, the exam should go OK! If any of this is unclear, please let me know.