well 18: 2 times 3 times 3
and 63: 3 times 3 times 7
and 117:3 times 3 times 13
the number tat ocurs the most is :3 and 3
so u multiply 3 times 3 = 9
so the GCD IS 9!
hope this helps and byee
done by: Paven Samrai
The Greatest Common Divisor of 72, 18 is 18.
The Greatest Common Divisor (GCD) for 18 63 is 9.
The Greatest Common Divisor (GCD) for 3 18 is 3
The Greatest Common Divisor of 15, 18 3.
The Greatest Common Factor of 18 and 117 is nine.
The Greatest Common Divisor of 72, 18 is 18.
The Greatest Common Divisor of 18, 45 is 9.
The Greatest Common Divisor (GCD) for 18 20 is 2.
The Greatest Common Divisor of 18, 54 is 18.
The Greatest Common Divisor (GCD) for 3 18 is 3
The Greatest Common Divisor (GCD) for 18 63 is 9.
The Greatest Common Divisor of 15, 18 3.
The Greatest Common Divisor is 2
The Greatest Common Divisor of 18, 45, 72 is 9.
The Greatest Common Factor of 18 and 117 is nine.
The Greatest Common Divisor of 18, 30 is 6.
The Greatest Common Divisor of 54, 144 is 18.