Question

Using prime factorisation find the LCM of 21, 28, 36, 45.

Answer 1

answer is 1260

thank you

Answer 2

Answer:LCM of 21,28,36 and 45

           2  21, 28, 36, 45

           2   21, 14, 18, 45

           3   21, 7, 9, 45    

           3   7, 7, 3, 15,      

           5   7, 7, 1, 5          

           7   7, 7, 1, 1    

                1, 1, 1, 1

LCM of 21, 28, 36 and 45 is 1260.

Hope this answer helps you!

Explanation: