The questions found in this title are exceptionally challenging and serve the purpose of differentiating the AL1 students from the other students. Our questions are modelled after top school exam questions and step-by-step detailed solutions are provided, along with tips on solving questions efficiently and effectively, model drawing techniques, visualisation techniques for complicated diagrams and checking answers by working backwards. Working through all the questions in this title will enable students to accelerate mastery of concepts and stimulate higher-order thinking to deal with difficult and challenging PSLE Maths questions that will appear.