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Last updated on May 26th, 2025

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Divisibility Rule of 243

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The divisibility rule is a way to find out whether a number is divisible by another number without using the division method. In real life, we can use the divisibility rule for quick math, dividing things evenly, and sorting things. In this topic, we will learn about the divisibility rule of 243.

Divisibility Rule of 243 for UK Students
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What is the Divisibility Rule of 243?

The divisibility rule for 243 is a method by which we can find out if a number is divisible by 243 or not without using the division method. Check whether 729 is divisible by 243 with the divisibility rule.  


Step 1: Check if the sum of its digits is divisible by 9. Here, 7 + 2 + 9 = 18, which is divisible by 9.


Step 2: Check if the number is divisible by 27. Divide the number by 27. If the quotient is an integer, the number is divisible by 27. In this case, 729 ÷ 27 = 27, which is an integer.


Step 3: As the number satisfies both conditions (divisible by 9 and 27), 729 is divisible by 243.
 

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Tips and Tricks for Divisibility Rule of 243

Learning the divisibility rule will help kids master division. Let’s learn a few tips and tricks for the divisibility rule of 243.

 

Know the multiples of 243:

 

Memorize the multiples of 243 (243, 486, 729, etc.) to quickly check divisibility. If the number is a multiple of 243, it is divisible by 243.

 

Use the sum of digits:

 

If the sum of the digits is divisible by 9, proceed to check divisibility by 27 to confirm divisibility by 243.

 

Repeat the process for large numbers:

 

Students should keep repeating the divisibility process until they reach a number that clearly satisfies both conditions for divisibility by 243.

 

Use the division method to verify:

 

Students can use the division method as a way to verify and cross-check their results. This will help them to verify and also learn.
 

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Common Mistakes and How to Avoid Them in Divisibility Rule of 243

The divisibility rule of 243 helps us quickly check if a given number is divisible by 243, but common mistakes like calculation errors lead to incorrect calculations. Here we will understand some common mistakes to avoid.

Mistake 1

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Not following the correct steps.
 

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Students should follow the correct steps: check if the sum of its digits is divisible by 9 and then if the number is divisible by 27.
 

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Divisibility Rule of 243 Examples

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Problem 1

Is 729 divisible by 243?

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Yes, 729 is divisible by 243.  
 

Explanation

We check divisibility by dividing directly since 243 is a factor of powers of 3.  


1) Divide 729 by 243.  


2) 729 ÷ 243 = 3, which is an integer.  


3) Therefore, 729 is divisible by 243.
 

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Problem 2

Check the divisibility rule of 243 for 2187.

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Yes, 2187 is divisible by 243.  
 

Explanation

We will check if 2187 is a power of 3, since 243 is 3^5.  


1) Divide 2187 by 243.  


2) 2187 ÷ 243 = 9, which is also a power of 3 (3^2).  


3) Therefore, 2187 is divisible by 243.
 

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Max, the Girl Character from BrightChamps

Problem 3

Is 486 divisible by 243?

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Yes, 486 is divisible by 243. 

Explanation

We can determine this by checking if the number is a multiple of 243.  


1) Divide 486 by 243.  


2) 486 ÷ 243 = 2, which is an integer.  


3) Therefore, 486 is divisible by 243.
 

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Problem 4

Can 1000 be divisible by 243 following the divisibility rule?

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No, 1000 is not divisible by 243.  
 

Explanation

 To verify divisibility by 243, divide the number by 243.  


1) Divide 1000 by 243.  


2) 1000 ÷ 243 ≈ 4.115, which is not an integer.  


3) Therefore, 1000 is not divisible by 243.
 

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Max, the Girl Character from BrightChamps

Problem 5

Check the divisibility rule of 243 for 1458.

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Yes, 1458 is divisible by 243.  
 

Explanation

 Divide to check if 1458 is a multiple of 243.  


1) Divide 1458 by 243.  


2) 1458 ÷ 243 = 6, which is an integer.  


3) Therefore, 1458 is divisible by 243.
 

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FAQs on Divisibility Rule of 243

1. What is the divisibility rule for 243?

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2. How many numbers are there between 1 and 1000 that are divisible by 243?

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3.Is 486 divisible by 243?

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4.What if I get 0 after subtraction?

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5.Does the divisibility rule of 243 apply to all integers?

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6.How can children in United Kingdom use numbers in everyday life to understand Divisibility Rule of 243?

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7.What are some fun ways kids in United Kingdom can practice Divisibility Rule of 243 with numbers?

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8.What role do numbers and Divisibility Rule of 243 play in helping children in United Kingdom develop problem-solving skills?

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9.How can families in United Kingdom create number-rich environments to improve Divisibility Rule of 243 skills?

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Important Glossaries for Divisibility Rule of 243

  • Divisibility rule: The set of rules used to find out whether a number is divisible by another number or not.

 

  • Multiples: Multiples are the results we get after multiplying a number by an integer. For example, multiples of 243 are 243, 486, 729, etc.

 

  • Integers: Integers are numbers that include all whole numbers, negative numbers, and zero.

 

  • Subtraction: Subtraction is a process of finding the difference between two numbers by reducing one number from another.

 

  • Sum of digits: The sum obtained by adding all the digits of a number together, often used in divisibility rules to check factors of 9.
     
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About BrightChamps in United Kingdom

At BrightChamps, we know numbers are more than just figures—they open doors to a world full of opportunities! Our mission is to assist children across the United Kingdom in mastering key math concepts, including today’s Divisibility Rule of 243, with a special emphasis on the Divisibility Rule—taught in a lively, enjoyable, and simple manner. Whether your child is measuring the speed of a roller coaster at Alton Towers, tracking scores at a local football match, or managing their pocket money for the latest gadgets, a solid grasp of numbers builds confidence for daily challenges. Our interactive lessons are designed to be both fun and accessible. Because children in the UK learn differently, we tailor our methods to suit every learner. From bustling London to Cornwall’s scenic coastlines, BrightChamps brings math to life, making it relevant and exciting across the UK. Let’s turn the Divisibility Rule into a fun part of every child’s math journey!
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Hiralee Lalitkumar Makwana

About the Author

Hiralee Lalitkumar Makwana has almost two years of teaching experience. She is a number ninja as she loves numbers. Her interest in numbers can be seen in the way she cracks math puzzles and hidden patterns.

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Fun Fact

: She loves to read number jokes and games.

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