No. Two composite numbers, like 4 and 9, can have a GCF of 1. They are said to be relatively prime or co-prime.
Composite. All whole numbers ending in zero are composite.
In any list of distinct numbers, one will be greater than the others. In the list of common factors, one will be the greatest.
No, it's never greater than the smallest number.
There is no greatest common multiples for whatever common multiple is claimed to be the greatest the lowest common multiple of the numbers (in this case 15) can be added to get an even greater common multiple.
The Greatest Common Factor depends upon the numbers for which there are common factors and it is the greatest one of them; it can be greater than 18, for example the greatest common factor of 40 and 100 is 20. The greatest common factor must be one of the factors of each of the numbers. As the factors of each number cannot be greater than that number, the greatest common factor of a set of numbers cannot be greater than the least number. If this number is not greater than 18 then the greatest common factor of the numbers cannot be greater than 18. Even if the least number is greater than 18 it is possible that the greatest common factor of a set of numbers is still not greater than 18, for example the greatest common factor of 20, 30 and 50 is 10.
4 and 9
25 and 36
8 and 16
15 and 16
No, the greatest common factor is never greater than the smallest number. The greatest common factor is the largest integer that divides evenly into all of the numbers listed.
8 and 16
8 and 16
24, 25 and 26
Yes it is.
No, the greatest common factor cannot be larger than any of the numbers in the set.
Composite. All whole numbers ending in zero are composite.
25 and 32