the boy and the forgotten password(精裝)

A boy steps in to help his grandmother who has forgotten the password to unlock her tablet. With just a few clues, and a lot of determination, will he be able to help her in time?The I''m a Maths Star! series comprises challenging Maths puzzles, presented in story form. Puzzles are described and then solved, step-by-step, through an engaging storyline, and using various Maths heuristic techniques that are also taught as part of the world-renowned Singapore Maths curriculum. Through illustrations and an engaging storyline, children will learn Maths heuristics, and be inspired to persevere in understanding, representing, and solving fun and intriguing Maths problems!