The solutions to the exercises in the first edition of the book are contained in the PDF file below:
Up until mid-2014 this solution key was sent only to teachers who had ordered books. However, as the second edition has now superseded the first edition with regards to classroom use, the first edition is increasingly being used by students for their own private study and revision. Making the solutions freely available is intended to help them in their learning.
For the second edition, the full solutions are contained only in the accompanying printed teachers’ guide, which is sold to accompany class sets of ten books or more. However, the answers to selected exercises are included at the back of the student exercise book to aid student self-assessment.