Question Paper | Mark Scheme |
New Spec: | |
June 2022 | |
June 2022 – Unit 1 | June 2022 – Unit 1 MS |
June 2022 – Unit 2 | June 2022 – Unit 2 MS |
June 2022 – Unit 3 | June 2022 – Unit 3 MS |
January 2022: | |
Oct/Nov 2021: | |
June 2021: | |
January 2021: | |
June/Nov 2020: | |
January 2020: | |
June 2019: | |
January 2019: | |
Old Spec: | |

Math
The Collatz Conjecture: Current Research and Approaches
The Collatz Conjecture (or 3n + 1 problem) asserts that iterating a simple process – halve n if n is even, or triple it and