Given that p≠0 p \ne 0\,p=0 and q≠0q \ne 0q=0, verify that 18p4q3r12p4q5=3r2q2\displaystyle \frac{18p^4q^3r}{12p^4q^5}=\frac{3r}{2q^2}12p4q518p4q3r=2q23r
296 exam-style questions on OCR GCSE Maths Indices. Each one has a worked solution and a mark scheme showing where the marks go.