SOLUTION: This question is "Least Common Multiple". I couldn't find a tab for it: 12= 35= 42=

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Question 339957: This question is "Least Common Multiple". I couldn't find a tab for it:
12=
35=
42=
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
List the prime factorization of each number

12=2*2*3
35=5*7
42=2*3*7


Now circle the unique (and most frequent) factors. These factors are the two "2" terms in 12, any 3, a 5 and a 7. Multiply these all together to get 2*2*3*5*7=4*15*7 = 60*7 = 420


So the LCM of 12, 35, and 42 is 420


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Jim