Question

8. Find the LCM of 18, 21and 35 by division method.
factorisation please​

Answer 1

Answer:

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Answer 2

Given : Numbers  18, 21 and 35

To Find :  LCM  by division method.

by  factorisation

Solution:

Numbers  18, 21 and 35

                   18          21             35

       2          9            21            35

       3          3            7              35

       3           1            7              35

       5           1             1               7

        7           1              1               1

LCM = 2 * 3 * 3 * 5 * 7  = 630

18 = 2 * 3 * 3  

21 = 3 * 7

35 = 5 * 7

LCM = 2 * 3 * 3 * 5 * 7 = 630

LCM of 18, 21 and 35 is 630

Additional Info:

HCF Highest common factor of given numbers is the largest factors which divides all the given numbers perfectly.

HCF = product of common factors of least power  

LCM  - Least common multiplier of given numbers is the least number which is perfectly divisible by given numbers.

LCM = product of each factor  of highest power