11+ Maths - Must Know Topics - PDF Book 5. Digital Download. Covers everything you need to know about Ratio & Proportions - including Direct Proportion, Inverse Proportion, Ratio when you know the part, Ratio when you know the total, Maps and Scale, Gradient, Complex / Tricky ratio questions and much more. Over 90 pages with nearly 300 questions, and detailed Step-by-Step explanation. This is a Textbook (teaches you techniques) and a Workbook (for further practice).  Includes lots of Tips and Traps to become 11+ ready. Get it on any device within seconds of purchase! An absolute Must-Have from elevenplusvocab.com!