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What is the LCM of 18 and 12

Guest Mar 10, 2015

Best Answer 

 #1
avatar+17736 
+5

18  =  2 · 3 · 3

12  =  2 · 2 · 3

The lowest common multiple must have each factor the maximum number of times found in the problem.

18 requires at least 1 '2' and at least 2 '3's

12 requires at least 2 '2'x and at least 1 '3'

Taking the maximum number of each, the LCM needs 2 '2's and 2 '3's   --->   2 x 2 x 3 x 3  =  36.

geno3141  Mar 10, 2015
 #1
avatar+17736 
+5
Best Answer

18  =  2 · 3 · 3

12  =  2 · 2 · 3

The lowest common multiple must have each factor the maximum number of times found in the problem.

18 requires at least 1 '2' and at least 2 '3's

12 requires at least 2 '2'x and at least 1 '3'

Taking the maximum number of each, the LCM needs 2 '2's and 2 '3's   --->   2 x 2 x 3 x 3  =  36.

geno3141  Mar 10, 2015

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