These questions are not here as tests. They should be used by you to gain experience of file-handling in Python and pseudocode. So, attempt as many as you can!
May-Jun 2015 Paper 21 Question 5
May-Jun 2015 Paper 23 Question 4
May-Jun 2016 Paper 21 Question 5
May-Jun 2016 Paper 23 Question 5
May-Jun 2017 Paper 21 Question 5
May-Jun 2017 Paper 22 Question 5
Oct-Nov 2017 Paper 21 Question 5