When Dermot O’Gorman began his career, his chosen specialism of environmentalism could scarcely have been less fashionable in corporate circles. It was the late 1980s, and we were under the influence ...

To extract and sort non-adjacent arrays in your data, nest the CHOOSECOLS or CHOOSEROWS functions inside your SORT or SORTBY ...

Learn about and revise how to simplify algebra using skills of expanding brackets and factorising expressions with GCSE Bitesize AQA Maths.