0
Best Answer
First you express the numbers as the product of their prime factors:
28 = 2x2x7
21 = 3x7
Next you find the HCF. In this case, the HCF is 7. Finally, you multiply the numbers together and divide by the HCF. 28x21/7 = 84
Therefore the LCM of 28 and 21 is 84.
This answer is:
Add your answer:
Earn +20 ptsQ: How do you find LCM of 28 and 21?
Write your answer...
Submit
Still have questions?
Continue Learning about Math & Arithmetic
Related questions
Find the LCM for 14 21 and 28?
56.
What is the LCM of 21 28 and 42?
LCM(21, 28, 42) = 84
What is the LCM of 21 14 and 28?
The LCM is: 84
What is the LCM for 6 21 and 28?
LCM(6, 21, 28) = 84.
What is the LCM of 28 what is the LCM of 21 what is the LCM of 9?
Of each of them on their own respectively is 28, 21 and 9. together is 252
What is the LCM of 273 21 and 28?
The Least Common Multiple (LCM) for 273 21 28 is 1,092.
What is the LCM of 35 21 and 28?
The Least Common Multiple (LCM) of 35, 21, and 28 is 420.
What is the LCM of 12 21 and 28?
LCM of 12 and 21 is 84, which is also a multiple of 28 so 84 is your answer.
What is the LCM of 21 28 and 32?
The LCM is: 672
What is the LCM of 18 and 21 and 28?
The LCM is: 252
What is the LCM 21 28 32?
The LCM is: 672
What is The least common multiple of 21 35 and 28?
The LCM of 2135 and 28 is 8540 The LCM of 21, 35 and 28 is 420.
Copyright ©2025 Infospace Holdings LLC, A System1 Company. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Answers.