No, 18 is a multiple of 3. 3 is a factor of 18.
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3 is a factor of 18
18 6*3 = 18 54/18 = 3
No, because 4 does not fit into 18 evenly.
The LCF is 1. The GCF is 3. The LCM is 18.
There are an infinite number of numbers with 3 as a factor. Any number evenly divisible by 3 has 3 as a factor. That means 6, 9, 12, 15, 18, ..., all have 3 as a factor.
The highest common factor of 21 and 18 is 3