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Last updated on May 26th, 2025

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LCM of 120 and 150

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LCM is the smallest and a common multiple of the numbers 120 and 150. We often apply the LCM to solve problems that have in them fractions, percentages, time intervals and others. Below, we explain how we find the LCM of 120 and 150.

LCM of 120 and 150 for Qatari Students
Professor Greenline from BrightChamps

What is the LCM of 120 and 150?

LCM (120,150) = 600 


There are many ways to find the LCM, let us look at the listing multiples method, prime factorization method and the division method. 
 

Professor Greenline from BrightChamps

LCM of 120 and 150 Using Listing the Multiples

Step 1: List multiples of the numbers; 


120–120,240,360,480,600,…


150– 150,300,450,600,…


Step 2: Find the smallest common number 


LCM(120,150) = 600 
 

Professor Greenline from BrightChamps

LCM of 120 and 150 Using Prime Factorization

Step 1: Prime factorize the numbers 


120 = 2×2×2×3×5


150= 2×3×5×5


Step 2: Multiply highest powers 


23×3×52 = 600 


LCM(120,150) = 600 
 

Professor Greenline from BrightChamps

LCM of 120 and 150 Using Division Method

  • Write the numbers in a row 

 

  • Divide them by their common prime factors 

 

  • Carry forward the numbers that are not divided by the previously chosen number

 

  • Continue dividing until the remainder is ‘1’ 

 

  • Multiply the divisors to find the LCM — 2×2×2×3×5×5 = 600

 

  • LCM(120,150) = 600 
     
Max Pointing Out Common Math Mistakes

Common mistakes to avoid while finding the LCM of 120 and 150

Listed here are a few mistakes that are frequently made when trying to find the LCM. 
 

Mistake 1

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Listing multiples incorrectly 
 

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one may incorrectly list 240 as a multiple of both 120 and 150 even if it is only a multiple of 120 due to an oversight. 
 

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LCM of 120 and 150 Examples

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Problem 1

Two machines A and B complete a cycle in 120 and 150 minutes, respectively. After how many minutes will both machines complete their cycle together again?

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The LCM(120, 150) = 600 minutes. 
 

Explanation

 Both machines will complete a cycle together in 600 minutes.
 

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Max, the Girl Character from BrightChamps

Problem 2

The LCM of two numbers is 36 and the sum is 21. Find the numbers.

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LCM(a, b) = 36 


a+b= 21


We know that, LCM(a, b)×HCF(a, b) =a×b 


Let us assume that the numbers a and b are 8 and 10, 


8+10 = 18, it is not equal to the sum given


Let us assume that the numbers a and b are 12 and 30,


30+12= 42, which is equal to the sum given


Product of 12 and 30; 


30 ×12= 360


LCM(a, b)×HCF(a, b) =a×b 


LCM (30,12)×HCF(30,12) =30×12 


LCM of 30,12; 


Prime factorization of 12  = 2×2×3


Prime factorization of 30 =  5×2×3


LCM(30,12) = 60


HCF of 30,12; 


Factors of 30 = 1,2,3,5,6,10,15,30 


Factors of 12 = 1,2,3,4,6,12


HCF(30,12) = 6


60×6 =30×12 


360 =360 
 

Explanation

 We, by assuming that a and b are 12 and 30 respectively and verifying the same against the formula figures that the assumption is right and a=12,b=30. 
 

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Max, the Girl Character from BrightChamps

Problem 3

If 120 items represent 20% of a total, and 150 items represent 25% of another total, what is the least common multiple of the totals?

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20% = 120 


Total = 120/ 0.2 = 600


25% = 150 


Total = 150/0.25 = 600 
 

Explanation

Thus, the LCM of the totals is 600.
 

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FAQs on the LCM of 120 and 150

1.What is the HCF of 120 and 150?

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2.What is the LCM of 125 and 150?

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3.What is the LCM of 100,150 and 120.

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4.What is the LCM of 45,120 and 150?

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5.What is the LCM of 150 and 225?

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6.How can children in Qatar use numbers in everyday life to understand LCM of 120 and 150 ?

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7.What are some fun ways kids in Qatar can practice LCM of 120 and 150 with numbers?

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8.What role do numbers and LCM of 120 and 150 play in helping children in Qatar develop problem-solving skills?

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9.How can families in Qatar create number-rich environments to improve LCM of 120 and 150 skills?

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Professor Greenline from BrightChamps

Important glossaries for LCM of 120 and 150

  • Multiple: product of a number and integer  

 

  • Prime Factor: a number whose factors are itself and 1 

 

  • Prime Factorization: breaking a large number into its prime factors
     
Professor Greenline from BrightChamps

About BrightChamps in Qatar

At BrightChamps, numbers represent more than digits—they unlock countless opportunities! Our goal is to help children throughout Qatar master important math skills, focusing on the LCM of 120 and 150 with special attention on understanding the LCM—in a lively, fun, and easy way. Whether your child is calculating how fast a roller coaster moves at Qatar’s Angry Birds World, keeping score at local football matches, or managing their allowance to buy gadgets, mastering numbers builds confidence for daily challenges. Our interactive lessons make learning enjoyable and simple. Because children in Qatar learn in many different ways, we adapt our approach to suit each learner. From Doha’s modern cityscape to desert landscapes, BrightChamps makes math come alive. Let’s make the LCM a fun part of every child’s learning!
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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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: She loves to read number jokes and games.

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