The GCD of given numbers is 1.
Step 1 : Find prime factorization of each number.
(view steps on how to factor 15, 3, 10, 2, 15, 2, 2, 10 and 3. )
Step 2 : Put a box around factors that are common for all numbers:
Note that in this example numbers do not have any common factors.
Step 3 : Multiply the boxed numbers together:
Since there is no boxed numbers we conclude that .