This 4th edition of Collins GCSE Maths has been fully revised and updated for the 215 GCSE specifications. The new edition of this well-established text has a new focus on mathematical reasoning and problem solving. The course coverage ensures that you will have the confidence to tackle the new curriculum and succeed. - Bring awe and wonder with a chapter opener that puts the math in context - Provide rigorous math practice with hundreds of high quality questions - Focus on literacy skills with key words per topic - Reason, interpret and communicate mathematically with flagged mathematical reasoning questions (labeled MR and CM) - Solve problems within mathematics and in other contexts with flagged problem-solving questions (labeled PS and EV) - Show step by step working through worked examples (numbered sequentially throughout the chapter) - Help students get to grips with concepts with more diagrams and visual representation - Access answers online, in the Teacher's Pack and in the Collins Connect edition