Competency Based Mathematics for secondary schools is a secondary school Mathematics series which consist of five volumes corresponding to each of the five classes in secondary school. The books are elaborated using the competency-based -approach from a situated perspective (through real life situations). Competency Based Mathematics for secondary schools book 5 includes many pass examination questions which students and teachers can use for revision and practice. Any inability to go through any of the questions indicates loop holes in that section and the student should go back and revise the required module.After going through the five volumes, students should be well equipped to sit in for the General Certificate of Education Examination (GCE) Ordinary Level Mathematics 570 examination and similar examinations. In addition, at the end of the course, the learner who has successfully gone through the content should among others be able to use mathematics with confidence to solve real life problems within the different domains of life, communicate concisely and unambiguously and develop the power of mathematical reasoning.Throughout the course the learner and the teacher should not take anything for granted even if it appears to resemble what was treated in the previous class. This is because at every level new competencies are introduced and old ones are developed and consolidated in different ways.