This free course was written by Kerry Lloyd, Frances Hughes and Tracy Mitchell at Coleg Cambria, in partnership with Addysg Oedolion Cymru | Adult Learning Wales, Coleg Gwent, the NPTC Group of Colleges and The Open University, and in collaboration with Anna E. Crossland, Middlesbrough College, using materials belonging to the Open School Trust Ltd (trading as the National Extension College), and in partnership with the Bedford College Group and West Herts College.
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‘Negative numbers’ image: gopixa/123 Royalty Free.
Figure 11: Brian Kell, Carnegie Mellon University; taken from http://math.cmu.edu/ ~bkell/ 21110-2010s/ symmetry-tilings.html.
Figure 30: © deltaart/123 Royalty Free.
Figure 1: Ski le Gap – ski and snowboard courses in Canada, https://skilegap.com/.
Figures 3 and 4: taken from Stagecoach UK Bus.
Figure 16: sourced from The Bank of England; taken from the BBC.
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