BrightChamps Logo
Login
Creative Math Ideas Image
Live Math Learners Count Icon191 Learners

Last updated on May 26th, 2025

Math Whiteboard Illustration

Divisibility Rule of 243

Professor Greenline Explaining Math Concepts

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 Singaporean Students
Professor Greenline from BrightChamps

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.
 

Professor Greenline from BrightChamps

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.
 

Max Pointing Out Common Math Mistakes

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

Red Cross Icon Indicating Mistakes to Avoid in This Math Topic

Not following the correct steps.
 

Green Checkmark Icon Indicating Correct Solutions in This Math Topic

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.
 

Max from BrightChamps Saying "Hey"

Divisibility Rule of 243 Examples

Ray, the Character from BrightChamps Explaining Math Concepts
Max, the Girl Character from BrightChamps

Problem 1

Is 729 divisible by 243?

Ray, the Boy Character from BrightChamps Saying "Let’s Begin"

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.
 

Max from BrightChamps Praising Clear Math Explanations
Max, the Girl Character from BrightChamps

Problem 2

Check the divisibility rule of 243 for 2187.

Ray, the Boy Character from BrightChamps Saying "Let’s Begin"

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.
 

Max from BrightChamps Praising Clear Math Explanations
Max, the Girl Character from BrightChamps

Problem 3

Is 486 divisible by 243?

Ray, the Boy Character from BrightChamps Saying "Let’s Begin"

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.
 

Max from BrightChamps Praising Clear Math Explanations
Max, the Girl Character from BrightChamps

Problem 4

Can 1000 be divisible by 243 following the divisibility rule?

Ray, the Boy Character from BrightChamps Saying "Let’s Begin"

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.
 

Max from BrightChamps Praising Clear Math Explanations
Max, the Girl Character from BrightChamps

Problem 5

Check the divisibility rule of 243 for 1458.

Ray, the Boy Character from BrightChamps Saying "Let’s Begin"

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.
 

Max from BrightChamps Praising Clear Math Explanations
Ray Thinking Deeply About Math Problems

FAQs on Divisibility Rule of 243

1. What is the divisibility rule for 243?

Math FAQ Answers Dropdown Arrow

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

Math FAQ Answers Dropdown Arrow

3.Is 486 divisible by 243?

Math FAQ Answers Dropdown Arrow

4.What if I get 0 after subtraction?

Math FAQ Answers Dropdown Arrow

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

Math FAQ Answers Dropdown Arrow

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

Math FAQ Answers Dropdown Arrow

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

Math FAQ Answers Dropdown Arrow

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

Math FAQ Answers Dropdown Arrow

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

Math FAQ Answers Dropdown Arrow
Professor Greenline from BrightChamps

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.
     
Professor Greenline from BrightChamps

About BrightChamps in Singapore

At BrightChamps, we understand that numbers are more than just digits—they unlock countless possibilities! Our goal is to help children all across Singapore develop strong math skills, focusing today on the Divisibility Rule of 243 and highlighting the Divisibility Rule—in a way that’s fun, engaging, and easy to learn. Whether your child is measuring the speed of a roller coaster at Universal Studios Singapore, following scores at local football matches, or managing their allowance to buy the latest gadgets, mastering numbers gives them confidence for everyday challenges. Our interactive lessons make learning enjoyable and clear. Since kids in Singapore learn in unique ways, we tailor our approach to each learner’s style. From Singapore’s bustling city streets to its scenic gardens, BrightChamps brings math to life, making it exciting across Singapore. Let’s make the Divisibility Rule a fun part of every child’s math journey!
Math Teacher Background Image
Math Teacher Image

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.

Math Teacher Fun Facts Image
Max, the Girl Character from BrightChamps

Fun Fact

: She loves to read number jokes and games.

INDONESIA - Axa Tower 45th floor, JL prof. Dr Satrio Kav. 18, Kel. Karet Kuningan, Kec. Setiabudi, Kota Adm. Jakarta Selatan, Prov. DKI Jakarta
INDIA - H.No. 8-2-699/1, SyNo. 346, Rd No. 12, Banjara Hills, Hyderabad, Telangana - 500034
SINGAPORE - 60 Paya Lebar Road #05-16, Paya Lebar Square, Singapore (409051)
USA - 251, Little Falls Drive, Wilmington, Delaware 19808
VIETNAM (Office 1) - Hung Vuong Building, 670 Ba Thang Hai, ward 14, district 10, Ho Chi Minh City
VIETNAM (Office 2) - 143 Nguyễn Thị Thập, Khu đô thị Him Lam, Quận 7, Thành phố Hồ Chí Minh 700000, Vietnam
Dubai - BrightChamps, 8W building 5th Floor, DAFZ, Dubai, United Arab Emirates
UK - Ground floor, Redwood House, Brotherswood Court, Almondsbury Business Park, Bristol, BS32 4QW, United Kingdom