180
Here's how to work it out
20 = 2x2x5
9 = 3x3
6 = 2x3
The answer has to have 2x2x5x3x3 (that includes, 20, 9 and 6) = 180
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6: 6, 12, 18, 24, 30, 36, 42, 48, 54, 60 20: 20, 40, 60 The LCM for 6 and 20 is 60. If you need help with finding the least common multiple (LCM) or greatest common factor (GCF) for some numbers then, on your computer, go to your search engine and type in "LCM calculator" to help you find the least common multiple or "GCF calculator" to help you find the greatest common factor.
The Least Common Multiple (LCM) for 4 6 9 20 is 180.
The least common multiple of 6 , 8 , 18 = 72
The least common multiple of the numbers 8 and 6 is 24.
least common multiple of 14 6 and 5 is 210.