A Level Further Maths, Core Pure 1, Chapter 6 · exam-style questions with mark schemes and worked solutions · shadows of past-paper questions and new questions in the style of Edexcel, Edexcel iAL, AQA, OCR A and MEI · adding and multiplying matrices ($\mathbf{AB} \neq \mathbf{BA}$), the zero and identity matrices, determinants of $2 \times 2$ and $3 \times 3$ matrices, singular and non-singular matrices, inverses of $2 \times 2$ and $3 \times 3$ matrices, $(\mathbf{AB})^{-1} = \mathbf{B}^{-1}\mathbf{A}^{-1}$, solving three linear equations with $\mathbf{M}^{-1}$, and three planes meeting at a point, in a sheaf or forming a prism