5 is one possible answer
5
17
It is: 1
17 is the largest number that evenly divides both 102 and 85.
3/5
5
17 102/17 = 6 85/17 = 5
1 and 5.
Just the number 1.
Prime factor each number and multiply all the numbers that are in both numbers. 30=2x3x5 85=5x17 5 is in both
The two numbers are coprime, so the answer is 1.
85 x 4 = 340