The greatest common factor of 21 and 39 is 3
44
-43 + 21 = -22
The least common multiple of 21 , 43 = 903
The GCF of 21 and 22, like the GCF of any two consecutive integers, is 1.
The GCF of 21, 22, and 306 is 1.
21 and 22 add to 43
The GCF is 1.
The gcf of 43 and 129 is 43, so the two digit number must be 43; howeverthe gcf of 86 and 129 is also 43, so the two digit number must be 86; howeverthe gcf of 22 and 86 is only 2 and the gcf of 22 and 43 is only 1, no neither 43 nor 86 has a gcf of 43!Hint:You cannot have a COMMON factor with only onenumber - common implies at least two numbers.The greatest COMMON factor is the largest number that divides all the numbers and depends upon all the numbers - it makes no sense to ask for the greatest COMMON factor of a single number.
-43
The GCF of 21, 49, and 84 is 7.
They are 21 and 22