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Last updated on May 26th, 2025

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Is 72 a prime number?

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Prime numbers have often fascinated mathematicians. Especially because of their no order or pattern for appearance at random. Even when we don’t understand their emergence in the list of numbers, we apply them in medicine, computer algorithms, cryptography, and others.

Is 72 a prime number? for US Students
Professor Greenline from BrightChamps

Is 72 a prime number?

How do we find whether a number is prime or not? Let us check out the various methods to learn when we have to check if a number is a prime number.

 

is 72 a prime number
 

Professor Greenline from BrightChamps

Using the Counting Divisors Method

The counting divisors method for 72 would simply be


Divisors of 72= 1,2,3,4,6,8,9,12,18,24,36,72


Number of divisors= 12


The number 72 can be considered composite.
 

Professor Greenline from BrightChamps

Using the Divisibility Test Method

In the divisibility method, the prime number only has 2 divisors, which are 1 and itself.


Divisors of 72=1,2,3,4,6,8,9,12,18,24,36,72


As 72 has factors more than 2 then it is not a prime number. 
 

Professor Greenline from BrightChamps

Using Prime Number Chart

The list of prime numbers under 100 are;


2,3,5,7,11,13,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97. 


72 is not present in the list, it is not a prime number.
 

Professor Greenline from BrightChamps

Using the Prime Factorization Method

This method is only used for a non-prime number/composite number. Since 72 is a composite number, prime factorization for 72 is :


Factors of 72 = 2×2×2×3×3
 

Max Pointing Out Common Math Mistakes

Common mistakes to avoid when determining if 72 is a prime number

It is highly likely we commit some mistakes due to confusion or unclear understanding. Let us look at possible mistakes we may make and try to avoid them. 
 

Mistake 1

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Thinking that all odd numbers are prime 
 

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 not all odd numbers are prime numbers. A composite number can still be an odd number.
 

Ray Thinking Deeply About Math Problems

FAQs: Is 72 a Prime Number?

1.Is 4 relatively prime to 6?

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2.What is the GCF of 44 and 66?

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3. What is the GCF of 40 and 100?

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4.What is the GCF of 52 and 65?

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5. What is the GCF of 11 and 13?

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6.Important Glossaries for "Is 72 a Prime Number"

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7.How can children in United States use numbers in everyday life to understand Is 72 a prime number??

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8.What are some fun ways kids in United States can practice Is 72 a prime number? with numbers?

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9.What role do numbers and Is 72 a prime number? play in helping children in United States develop problem-solving skills?

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10.How can families in United States create number-rich environments to improve Is 72 a prime number? skills?

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Professor Greenline from BrightChamps

About BrightChamps in United States

At BrightChamps, we know numbers are more than just digits—it’s a way to open doors to countless opportunities! Our mission is to help kids all across the United States grasp important math skills, like today’s focus on the Is 72 a prime number? with a special focus on understanding prime numbers—in a way that’s lively, enjoyable, and easy to follow. Whether your child is figuring out how fast a roller coaster speeds through Disney World, keeping track of scores at a Little League baseball game, or managing their allowance to buy the latest gadgets, mastering numbers gives them the confidence they need for everyday challenges. Our interactive lessons make learning both simple and fun. Because kids in the USA learn in many different ways, we tailor our approach to fit each child’s unique style. From the bustling streets of New York City to the sunny shores of California, BrightChamps brings math to life, making it relatable and exciting throughout America. Let’s make prime numbers 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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Max, the Girl Character from BrightChamps

Fun Fact

: She loves to read number jokes and games.

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