1, 3, 7, 21.
1, 3, 7 and 21. Four numbers.
1, 3, 7 and 21
Nothing can go evenly into 21 or 17. They are both odd numbers and therefore cannot be evenly divided.
They are: 3 and 7
2 and 21, and 6 and 7
1, 3, 7 and 21. Four numbers.
21
1 ,3 ,7 ,21
1, 3, 7, 21.
1, 3, 7, 21.
1, 3, 7 and 21
21
Nothing can go evenly into 21 or 17. They are both odd numbers and therefore cannot be evenly divided.
1 and 7.
They are: 3 and 7
The numbers that go into 42 are1, 2, 3, 6, 42, 21, 14,
Oh, dude, 9 and 21 both go into numbers that are multiples of both 9 and 21. So, like, they can go into numbers like 63, 126, 189, and so on. It's just basic math, nothing too mind-blowing.