Question

L.C.M of 12,16,18,21,28 solve step by step​

Answer 1

Step-by-step explanation:

Factorize of the above numbers :

  12  =  2^{2} × 3

  16  =   2^{4}

  18   =   3^{2} × 2

  21  =    7 × 3

  28 =    2^{2} × 7

L.C.M.   =    2^{4} × 3^{2} × 7

             =    16× 9 × 7

             =  1008

but 1008 + 7 = 1015

Ya, LCM of the numbers is 1008 which is equal to the smallest no diminished by 7,

So 1008 = x-7,

Then smallest no, x=1008+7.

That's why we are added with 7

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Answer 2

Answer:

12,16,18,21,28=6,8,9,21,14=3,4,9,21,7=1,4,3,7,7=1,4,3,1,1=1×4×3×1=12 ans is 12