SOLUTION: Find the LCM 20, 36, 45

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Question 169315This question is from textbook Introductory Algebra
: Find the LCM
20, 36, 45 This question is from textbook Introductory Algebra

Answer by Mathtut(3670) About Me  (Show Source):
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factor each number into primes
20=2*2*5
36=2*2*3*3
45=3*3*5
now take the largest amount of each prime that occurs in this case 2*2 is the largest occurence of 2 , 3*3 is the largest occurence of 3 and a single 5 is the largest occurence of 5
now multiply all those together to get lcm 2%2A2%2A3%2A3%2A5=180