Description for 11+ Mock Test Papers Tutor Pack for CEM Inc Audio Download (Letts 11+ Success) Paperback. Get your students test-ready using this pack of mock exams for the CEM 11+ selection test. Children can practise answering CEM-style questions under timed conditions with audio instructions for a realistic test experience. Series: Letts 11+ Success. Num Pages: 104 pages. BIC Classification: 4KDP; 4Y; YQ; YQZ. Category: (E) Primary & Secondary Education; (J) Children / Juvenile. Dimension: 297 x 210. Weight in Grams: 270.