Find the gcd of 15 and 28 SolutionTo calculate the greatest

Find the g.c.d of 15 and 28 .

Solution

To calculate the greatest common divisor of 15 and 28, we\'ll factor 15 and 28 into their prime factors.

15 = 3*5

18 = 2*2*7

Now, we\'ll consider the common factors from both numbers and we\'ll multiply them.

We notice that the numbers don\'t have other common factors besides 1.

So the greatest common divisor is1.

gcd {15 , 28} = 1

If 2 numbers have the gcd = 1 they are relatively prime, so 15 and 28 are relatively prime.