How do I find the greatest common numerical factor of these pairs of numbers?

3, 5





3,6





4,14





Is there a trick to this?How do I find the greatest common numerical factor of these pairs of numbers?
If both numbers are prime then their gcf is 1.


3 and 5 are both prime.





So gcf(3, 5) = 1





If one number is a multiple of the other, their gcf is the smaller number.





6 is a multiple of 3.





So gcf(3, 6) = 3





The general method would be to find the prime factors of each number and then ascertain their gcf by inspection.





4 = 2 x 2





14 = 2 x 7





gcf(4, 14) = 2