While it is important to learn all the concepts across all the topics of IBPS PO Prelims Quantitative Aptitude, it is equally important to learn them in an order. Most quant topics are interdependent, meaning, you need to know concepts of one topic to understand or solve another.
Start with Basics: Brush up you high school math concepts using NCERT textbooks (8th to 10th grade).
Improve your Calculation Speed: Learn tables up to 20 and square roots up to 30 and cube roots up to 20. Also, follow and practice the one-liner approach for quicker addition, subtraction, multiplication and division.
Mock Tests: Practice tests including questions of varying difficulty levels to prepare you for any kind of question in the exam. Also, always analyse your mock attempt, identify the weak areas and fix them.
IBPS PO Prelims 2017: Quantitative Aptitude Section Analysis
Quant Books for IBPS PO 2018
Fast Track Objective Arithmetic by Rajesh Verma
Quantitative Aptitude for Competitive Examinations by R.S. Agarwal
Study material prepared by Guru Shishya team
Keep checking this blog post on strategy for English and reasoning sections for IBPS PO exam 2018.