BrightChamps Logo
Hamburger Menu Icon for BrightChamps Website Navigation
Login
Creative Math Ideas Image
Live Math Learners Count Icon148 Learners

Last updated on May 26th, 2025

Math Whiteboard Illustration

LCM of 14 and 15

Professor Greenline Explaining Math Concepts

The meaning of least common factor (LCM) is to find the smallest number that divides any two integers evenly. LCM is used mainly in fractions to find a common number for both the integers. We use LCM for solving problems, lining up cycles or even synchronizing of events, also to schedule tasks in everyday life.

LCM of 14 and 15 for Indian Students
Professor Greenline from BrightChamps

What is the LCM of 14 and 15?

We use LCM of 14 and 15 to find  the smallest number that divides both the numbers equally.  The smallest positive number is the number that divides both numbers equally, is 210 without leaving any remainder. LCM is used mainly in fractions to find a common number for both the integers.

Professor Greenline from BrightChamps

How to find the LCM of 14 and 15?

The LCM of 14 and 15 can be found by the following methods like division method, listing multiples, prime factorization.

Professor Greenline from BrightChamps

LCM of 14 and 15 using Division method:

In division method, we divide both the numbers, we begin with dividing side by side the smallest number. We continue dividing until we get a common number that divides both the numbers equally. It makes it easier for the children to focus on prime factors and identify them.

 

  • 2 divides 14 and not 15

 

  • 3 divides 15 and not 14

 

  • 5 divides 15 and not 14

 

  • 7 divides only 14.

 

Now multiply the divisors : 2×3×5×7=210 which is the LCM.
 

Professor Greenline from BrightChamps

LCM of 14 and 15 using Listing multiples:

Start by listing multiples of both the numbers separately:


Multiples of 14 are 14,28,42,56,70,84,98,112,126,140…..


Multiples of 15 are 15,30,45,60,75,90,105,120,135,150…..

 

The least common factor from the list is 210. Therefore, the LCM of 14 and 15 is 210.
 

Professor Greenline from BrightChamps

LCM of 14 and 15 using Prime factorization:

We part both the numbers unto factors:


Factor of 14: 2×7


Factors of 15: 3×5

 

Take the powers of both the numbers and multiply together:


LCM=2x3x5x7=210.
 

Max Pointing Out Common Math Mistakes

Common Mistakes and How to Avoid Them in LCM of 14 and 15

While solving problems based on the LCM of 14 and 15, children fail to understand few concepts, to give an idea of the mistakes,    given below are a few mistakes and solutions of how to avoid them:
 

Mistake 1

Red Cross Icon Indicating Mistakes to Avoid in This Math Topic

Stopping the division method way too soon.
 

Green Checkmark Icon Indicating Correct Solutions in This Math Topic

Students sometimes stop dividing very soon, when they are not able to divide both the numbers with the same number. For example, we can divide14 by 2, but 15 isn't divisible by 2. To continue the dividing method until all the factors are found. The students should continue dividing until they find the common number that divides both the integers.
 

Max from BrightChamps Saying "Hey"

Examples of LCM of 14 and 15

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

Problem 1

Add the fractions 2/14 and 3/15

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

To add the fractions, we need to  find the common denominator, and we need to find the LCM of the numbers (14 and 15)

LCM of 14 and 15


Prime factors of 14: 2×7


Prime factors of 15: 3×5

 LCM = 2×3×5×7=210


2/14, multiply both numerator and denominator with 15 to get 210 as the denominator.


3/15, multiply both numerator and denominator with 14 to get 210 as the denominator.


We get, 30+42/210= 72/210.
 

Explanation

So the sum of 2/14 and 3/15 is 72/210.

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

Problem 2

Solving for x to add the fractions. x/14 + x/15=1

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

 x/14 + x/15=1


  x/14, multiply both numerator and denominator with 15 to get 210 as the denominator, we get 15x/210.


  x /15, multiply both numerator and denominator with 14 to get 210 as the denominator, we get 14x/210.

 

14x+15x/210=1


14x+15x=1x210


29x=210


x=210/29
 

Explanation

So, the value of x is 210/29.
 

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

Problem 3

Add the fractions 5/14 and 6/15

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

To add the fractions, we need to  find the common denominator, we need to find the LCM of the numbers 14 and 15.

LCM of 14 and 15


Prime factors of 14: 2×7


Prime factors of 15: 3×5


LCM = 2×3×5×7=210


5/14, multiply both numerator and denominator with 15 to get 210 as the denominator.


 6/15, multiply both numerator and denominator with 14 to get 210 as the denominator.


We get, 75+90/210= 165/210.
 

Explanation

So the sum of 5/14 and 6/15 is 165/210.
 

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

Problem 4

A student organization meets every 14 days, and the parent-teacher organization meets every 15 days. When will both the organization meet together again?

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

LCM of 14 and 15


Prime factors of 14: 2×7


Prime factors of 15: 3×5


LCM = 2×3×5×7=210
 

Explanation

Both organizations will meet together every 210 days.
 

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

Problem 5

Solving for x to add the fractions. 6x/14 + 7x/15=1

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

6x/14 + 7x/15=1


6x/14, multiply both numerator and denominator with 15 to get 210 as the denominator, we get 90x/210.


7x /15, multiply both numerator and denominator with 14 to get 210 as the denominator, we get 98x/210.

 

90x+98x/210=1


90x+98x=1x210


188x=210


x=210/188
 

Explanation

So, the value of x is 210/188.
 

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

FAQ’s on LCM of 14 and 15

1.What are the multiples of 128?

Math FAQ Answers Dropdown Arrow

2.There are how many factors in 3600?

Math FAQ Answers Dropdown Arrow

3.Write the LCM of 12,15, and 45?

Math FAQ Answers Dropdown Arrow

4.Write six hundred and forty thousand in numbers?

Math FAQ Answers Dropdown Arrow

5.What is the GCF, If the LCM of 14 and 15 is 210?

Math FAQ Answers Dropdown Arrow

6.How can children in India use numbers in everyday life to understand LCM of 14 and 15?

Math FAQ Answers Dropdown Arrow

7.What are some fun ways kids in India can practice LCM of 14 and 15 with numbers?

Math FAQ Answers Dropdown Arrow

8.What role do numbers and LCM of 14 and 15 play in helping children in India develop problem-solving skills?

Math FAQ Answers Dropdown Arrow

9.How can families in India create number-rich environments to improve LCM of 14 and 15 skills?

Math FAQ Answers Dropdown Arrow
Professor Greenline from BrightChamps

Important glossaries on the LCM of 15 and 14

  • Prime Factor: A natural number or whole number which has factors that are 1 and itself. For Example, 3 is a prime number.

 

  • Prime Factorization: The process of breaking down a number into its prime factors is called Prime Factorization. For example, the factorization of 14 is 2x7.

 

  • Co-prime numbers: numbers which has the only positive divisor of them both as 1. For example, 6 and 7.
     
Professor Greenline from BrightChamps

About BrightChamps in India

At BrightChamps, we understand numbers are much more than just digits—they open doors to endless possibilities! We strive to help children all across India master key math skills, focusing today on the LCM of 14 and 15 with a special emphasis on understanding the LCM—in a way that’s lively, enjoyable, and easy to understand. Whether your child is calculating how fast a train passes by, keeping scores during a cricket match, or managing pocket money to buy new gadgets, mastering numbers boosts their confidence for everyday situations. Our interactive lessons make learning simple and fun. Since children in India have varied learning styles, we customize our teaching to fit each child. From the bustling markets of Mumbai to the vibrant streets of Delhi, BrightChamps brings math to life, making it relatable and exciting all across India. Let’s make the LCM an enjoyable part of every child’s math learning!
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