SOLUTION: What is the LCM of 84 and 138

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Question 555329: What is the LCM of 84 and 138
Answer by jim_thompson5910(35256) About Me  (Show Source):
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First, list the prime factorization of each number. If you need help with prime factorization, check out this solver.


84: 2*2*3*7


138: 2*3*23


Now highlight the unique factors. Remember, highlight the factors that occur most frequently


84: 2*2*3*7


138: 2*3*23


Now multiply all of the highlighted factors

2*2*3*7*23=1932

So the LCM of 84 and 138 is 1932

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