| Thought processes while completing a C4 Comprehension |
June 2005 Communication with other civilisations |
| January 2006 Electing Members of the European Parliament | June 2006 Modelling athletics records |
| January 2007 Benford’s Law | June 2007 Modelling sea waves |
| January 2008 The Golden Ratio | June 2008 Sudoku puzzles |
| January 2009 Measuring the volume of fuel in a tank | June 2009 The Prisoner’s Dilemma |
| January 2010 Cipher Systems | June 2010 Greener travel Worked solutions |
| January 2011 The Art Gallery Problem | June 2011 Card safety |
| January 2012 Curves of Constant Width | June 2012 The world population |
| January 2013 Taxicab geometry | June 2013 Day-Night Maps |
| June 2014 Insurance for Young Drivers | June 2015 Scheduling lifts |
| June 2016 Photomontages | June 2017 Feigenbaum’s Constant |
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Practice Papers - 1 (Pythagorean and other Triples) |
Practice paper - 2 (Perfect Numbers) |
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Practice Paper - 3 (Choosing Your Weights) |
Practice Paper - 4 (The 50p coin) |
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Practice Paper - 5 (Traffic Flow) |
Practice Paper - 6 (The Mystic Rose) |
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Practice task 1 (Randomised Response Technique) |
Practice task 2 (Do trains run late) |
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Practice task 3 (How far to shop) |
Read Me |
Comprehension for reading
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Perfect Numbers (PP) | |
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The 50p coin (PP) |
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Traffic Flow (PP) | |
