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Chapter Summary

Test of Divisibility

ICSE · Class 4 · Mathematics

Summary of Test of Divisibility for ICSE Class 4 Mathematics. Key concepts, important points, and chapter overview.

121 questions30 flashcards5 concepts

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Overview

In this chapter, we learn how to quickly find out if a number can be divided evenly by another number without actually doing the division. These shortcuts are called 'divisibility rules'. They help us solve math problems faster and with more confidence.

Key Concepts

A number is divisible by 2

A number is divisible by 2 if its last digit is even (0, 2, 4, 6, or 8). For example, 48 ends in 8, so it is divisible by 2.

Add all the digits of

Add all the digits of the number. If the sum is divisible by 3, then the number is divisible by 3. For example, 243 → 2+4+3=9, and 9÷3=3, so 243 is di

A number is divisible by 5

A number is divisible by 5 if it ends in 0 or 5. For example, 775 ends in 5, so it is divisible by 5.

A number is divisible by 6

A number is divisible by 6 only if it is divisible by both 2 and 3. For example, 84 is even (divisible by 2) and 8+4=12 (divisible by 3), so 84 is div

Add all the digits of

Add all the digits of the number. If the sum is divisible by 9, then the number is divisible by 9. For example, 4158 → 4+1+5+8=18, and 18÷9=2, so 4158

Learning Objectives

  • Understand the rules for divisibility by 2, 3, 5, 6, 9, and 10
  • Apply divisibility rules to large numbers
  • Check if a number is divisible by another using simple digit checks
  • Use divisibility rules to solve real-life problems

Frequently Asked Questions

What are the important topics in Test of Divisibility for ICSE Class 4 Mathematics?
Test of Divisibility covers several key topics that are frequently asked in ICSE Class 4 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Test of Divisibility — ICSE Class 4 Mathematics?
Understand the core concepts first, then work through the 121 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for Test of Divisibility

All 17 chapters — ICSE Class 4 Mathematics Chapter Summary

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