LCM(6, 9, 10) = 90
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6*9=54 so they both go into it evenly, but the lowest number is 18.
3 + 6 + 9/9
The least common multiple of 5 6 9 and 10 is: 90
9 and 6 don't go into the factor, the factor goes into 9 and 6. The GCF of 9 and 6 is 3.
The only common factor of ALL those numbers is.... 1 !