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Best Answer
To find the lowest common multiple for numbers, prime factor each the use each Prime number the number of times it appeared the most in each number.
18=2x3x3
20=2x2x5
30=2x3x5
lcm=2x2x3x3x5=180
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Earn +20 ptsQ: What is the LCM of 18 20 and 30?
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