Top Videos on Basics of Number System and Divisibility Rules for CAT by PW

Number System questions in CAT can involve more than identifying prime or composite numbers. You may need to compare fractions, check divisibility, find remainders or use factors to solve a problem efficiently. If you are unsure which rule applies to a particular question, even basic calculations can take longer than expected.

The following PW videos cover these concepts from the basics. You can use them to understand number classifications, practise divisibility checks, and revise essential calculation methods before attempting CAT-level Quantitative Aptitude questions.

Video 1. Build a Strong Foundation in Number System Concepts for CAT

If you are starting Number System preparation, understanding how different types of numbers relate to one another is an essential first step. This lecture introduces natural, whole, integer, prime, composite, rational, irrational, and real numbers.

It also covers fraction comparison using cross-multiplication and other methods, along with questions involving series sums and real-life applications.

The session on MBA Wallah introduces related topics such as divisibility, unit digits, factors, trailing zeroes and remainders. You can use it to organise your notes and identify the concepts you need to practise further.

Revising these fundamentals first can help you approach more detailed Number System questions with greater clarity.

Video 2. Practise Divisibility Rules and Rounding Off for Faster Calculations

Divisibility rules and rounding off can help you simplify calculations and check answers more efficiently during CAT Quant practice. This video explains these concepts alongside place value and basic arithmetic terminology. You will learn about face value, dividend, divisor, remainder, and quotient, with numerical examples demonstrating how these ideas work in practice.

Use this lesson when you want to revise calculation fundamentals or understand how to handle questions involving divisibility and remainders.

Focus on recognising which rule applies to a question and keeping your calculations accurate. Regular practice with these methods can help you avoid common calculation errors and use your time more effectively during mock tests.

Video 3. Start CAT Number System Preparation from Zero Level

If you are new to the CAT Quantitative Aptitude Syllabus, this demo lecture provides an introduction to Number System concepts. It covers the number chart, prime and composite numbers, factors and remainders, helping you understand the basic ideas before moving to more demanding questions.

The session also discusses the importance of building fundamentals, practising regularly and connecting Number System preparation with related areas such as percentages, ratios, simplification and equations.

You will find guidance on selecting questions, managing time and handling exam pressure. Watch this lesson if you need a starting point for your preparation and want to develop a consistent approach to learning and practising Quant concepts.

How These Videos Help in CAT Number System Preparation

These three PW videos cover different stages of Number System preparation, from learning basic concepts to improving calculation accuracy. To get the most out of them, follow this approach:

• Build your fundamentals: Start with the Number System basics lecture to understand number classifications, fraction comparison and related concepts before attempting advanced questions.

• Improve calculation accuracy: Watch the divisibility rules and rounding off lecture to practise checking divisibility, understanding remainders and simplifying calculations.

• Develop a consistent preparation approach: Use the CAT demo lecture to revise factors, prime and composite numbers, and question-selection techniques while connecting Number System concepts with other Quant topics.

• Practise after watching: Solve related CAT-level questions and review your mistakes to identify concepts that need more attention.

• Revise regularly: Revisit important rules and calculation methods before mock tests to improve recall and reduce avoidable errors.

Using the videos alongside regular question practice can help you strengthen your Number System fundamentals and approach CAT Quantitative Aptitude questions with greater confidence.

These three PW videos cover the essential starting points for Number System preparation, from classifying numbers to applying divisibility rules and solving questions involving factors and remainders.

Begin with the foundational lecture, revise calculation methods and then practise the concepts through questions. Consistent revision and timed practice can help you improve accuracy and become more confident when attempting Number System questions in CAT Quantitative Aptitude.