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20 has four factors less than 6: 1, 2, 4 & 5
A factor of a number is normally defined as a natural number (i.e. a positive integer/positive whole number; thus 0 is not included) which divides into that number giving a natural number as a result. Therefore all natural numbers will have at least 4 factors unless they are prime numbers(which, by definition, only have 2 factors).
The number 20 has the following factors:
1,20,2,10,4 & 5.
Do you see how I have written the factors so that they are paired together as the multiples that give 20? (E.g. 1 and 20 etc... Often you will see factors written as, for example 1 x 20, 2 x 10, 4 x 5).
If we re-order those factors into ascending order we will get:
1,2,4,5,10 & 20.
So those less than 6 are: 1, 2, 4 & 5.
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What is the smallest common factor of 25 and 50 and what is the gcf?
the smallest common factor is 1 and the gcf is 25.
Can the greatest common factor ever be smaller than the smallest coefficient?
No. The smallest coefficient possible is 1, and the smallest GCF is also 1. You cannot have a common factor of zero.
The smallest common factor of 16 and 24?
There is no such thing as the smallest common factor. I guess the smallest common factor (integers only) for 16 and 24 would be -8. But that's just the negative version of the greatest common factor. I think you meant to ask either what is the smallest common multiple of 16 and 24 or what is the greatest common factor of 16 and 24. The greatest common factor of 16 and 24 is 8. The smallest common multiple of 16 and 24 is 48.
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