Oh, dude, let me break it down for you. So, for 15, you've got 1, 3, 5, and 15. And for 51, you've got 1, 3, 17, and 51. Those are the numbers that can evenly slide into those two bad boys. Cool, right?
1, 3, 17, 51.
They are: 1 and 51
The numbers 1 and 3.
3 and 119 7 and 51
1, 3, 5, 15.
1 and 3 will go into both numbers evenly leaving no remainders
The numbers that go into 30 are1, 2, 3, 5, 30, 15, 10, 6
1 and 3 go into both.
No, only these numbers can: 1, 3, 5, 15.
These will: 1, 3, 5, 15, 17, 51, 85, 255.
3 goes into 51 evenly 17 times So does 25 1/2 (twice). I am wondering if you want only whole numbers? You could go on forever with fractions and decimals.
No. 51 is not evenly divisible by 12.