Question

find the lcm of 18 21 27 30​

Answer 1

Answer:

1890

Step-by-step explanation:

lcm of 18 21 27 30

lcm=18,21,27,30/3=

        6,7,9,10/2=

        3,7,9,5/3=

        1,7,3,5/5=

        1,7,3,1/7=      

        1,1,3,1/3=

        1,1,1,1

therefore lcm= 3*2*3*5*7*3=1890

i hope it helps

       

       

Answer 2

Using Prime Factorisation Method

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18 = 2×3×3

21 = 3×7

27 = 3×3×3

30 = 2×3×5

LCM of 18, 21, 27 and 30 = 2×3×3×3×5×7=1890