198 is the greatest three-digit even number that has no factor equal to 4.
Yes, if that number is a factor of the other.
The GCF can be equal to the smaller number if the smaller number is a factor of the larger one. The GCF can be equal to both numbers if they are the same number. The GCF of 10 and 10 is 10.
Only if that number is a factor of the other.
Only when one of the numbers is a factor of the other.
4 is not a factor of 998
No. In order for something to be a factor of a number, it has to be less than or equal to the number.
Always equal to or less than the smaller number, yes.
Lots of numbers are NOT common factors. For example, 5, 7, 100...Get the greatest common factor of both numbers. All common factors are factors of this greatest common factor. Note that all of them must needs be less than or equal to the greatest common factor. Any other number is NOT a common factor.
Yes, the greatest common factor of a pair of numbers can equal one of the numbers if one of the numbers is a factor of the other.
Yes, if you're comparing a number to itself.
No. At most, it can be equal to the smaller number.