As RRB Chennai and RRB Ajmer have floated ECA selection tenders, it is expected that Indian Railways would like to conduct CBT 1 Online exam likely in last quarter of 2020. Crores of applicants have applied and are preparing for RRB CEN 1/2019 NTPC CBT 1 and RRC Group D first stage exam. According to structure of Computer Based Test Stage 1 for NTPC, the Board would ask 100 Questions of total 100 marks in Multiple Choice Based (MCQ) format. NTPC CBT 1 will be conducted of duration 1 hour 30 minutes or 90 minutes. Here is the list of impportant mathematics topics is compiled for aspirants. Mathematics section will carry 30 questions carrying 1 mark each in RRB NTPC 2020 CBT1. Exam consisting of Objective Multiple Choice Questions (MCQs)
Candidates must practice the sectionwise important topics of RRB NTPC 2020 1st Stage CBT to score high marks in the exam. For the ease of the candidates, we have compiled the list of important topic for Mathematics section based on the latest exam pattern of the RRB NTPC 2020 Exam.
In Computer Based Test for CBT 1 30 questions will be asked under Mathematics section. This section seems the deciding factor for qualifying or disqualifying for students in Railway exams. As students move from theory to practical work during exam. Moving from GK, English to Mathematics always brings frustration to students as they abruptly moves from theory to practical and mathematical calculations. Brushing mind in theory brings problems during practical sections like Mathematics/ Reasoning & other scientific calculations.
For students suggestion is given to attempt mathematics section in beginning or secondly after General Reasoning.
Questions in RRB NTPC CBT 1 from Mathematics & Tips for students to Score high marks
Basic of all, deep of important: Learning basics or common formulas of every mathematics topic is fine. Students should prepare / focus on important topics for practice. Tips to learn basic of all and deep practice of important ones work during exam. When you are beginning your preparation, don’t look for shortcuts first. Try to learn basics of all the topics and gain indepth knowledge. Once you have developed a command over these topics, then you can switch to shortcuts or tricks for quick calculations.
Time Management: Students are required to allot proper time to important topics of Mathematics section. Initially going through easy questions would be a better idea which will also boost morale of student. Can spend rest few minutes for questions you skip initially. Try not to give more than one & half minute to any mathematics question. If time left after covering whole exam, can move back to those questions deserved timing.
Should Read RRB NTPC / Group D Exam Latest Update
Learn Shortcut Methods: To sharp your calculation students should work on rapid shortcut methods and tricks they learn during preparation. For gaining accuracy and speed try to Practice tricks and remember tables, cubes, squares, and square roots.
Here are the tips and list of important mathmatics topics for RRB NTPC CBT 1 online examination.
Simplification (Fractions and Decimals, Square roots) 
One or two questions From Simplification Techniques like BODMAS Rule, Fractions, Surds and Indices, Square roots 
Percentage 
Maximum two questions can be asked 
Average 
One question is must, work on fast calculations 
Ratio and Proportion 
One to Two questions are expected, prepare upto advanced level 
Problems on Ages 
One question must, work with logic & practice 
Number System 
One to two questions Practice last year questions & formulas 
Number Series 
One question must, prepare LHM/ HCF 
Time, Speed and Distance (Problems on Boats and Streams, Problems on Trains) 
Two or more questions Prepare formulas of questions on Boats & Streams and Trains are an integral part of this chapter.

Profit and Loss (Discount and Partnership) 
Two or more questions, practice and revision of formulas 
Simple Interest and Compound Interest 
One or two questions, practice questions on the theory of interest & SI/ CI formulas 
Time and Work (Pipes and Cisterns) 
One question must, focus on revise previous year questions on Time & Work, Pipes & Cistern and Work & Efficiency 
Mixture and Allegation 
One question expected, prepare by practice 
Data Interpretation 
One question with 45 parts expected, prepare questions in the form of Bar Graphs, Pie Charts, Tables, etc. 
Mensuration & Geometry 
Two to three questions, Recall formulas of Triangle, Quadrilaterals, Regular Polygons, Circle, Right Prism, Right Circular Cone, Right Circular Cylinder, Sphere 
RRB NTPC CBT 1 Examination ingredients
Negative Marking There shall be negative marking for incorrect answer in CBTs. Deduction of 1/3rd of the marks allotted for each question shall be made for each wrong answer
Website of the RRB Chennai rrbchennai.gov.in