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3 is the smallest number that is a factor 66 and a multiple of 3
12 is the smallest multiple of 3 and 4.
It is: 12
The smallest number is 3
The LCF, or Lowest Common Factor, of 3 and 5 is 15. This is because 15 is the smallest number that both 3 and 5 can divide into evenly. In other words, 15 is the smallest multiple that is common to both 3 and 5.