For the CAT and CAT like aptitude tests Arithmetic progression, Geometric Progression and Harmonic Progression are very important topics in Quantitative Aptitude. So We at Disha Publication providing Progression Formulas and Practice exercise for candidates who are going to appear for CAT Exam 2015. This PDF contains formulas for Arithmetic Progression, Geometric Progression and Harmonic Progression. We have given three practice exercises i.e Foundation Level, Standard Level and Expert Level exercise in PDF. Solution is also given at the end of document so that candidates can check answers. So candidates can download it from Disha Publication and prepare progression topic for CAT Exam.