32. 4x8= 32. They can both go into 32
2 and 4 can go into 8, but 13 does not go into it.
It is: 8
1, 2, 4 These are all common factors because they are all numbers that go into both 4 and 8. For the number four: 1 x 4 , 2 x 2 For the number eight: 1 x 8 , 2 x 4 There are no other numbers that go into both 4 and 8 and so 1, 2 and 4 are the only common factors here
1 2 4 7 14 28
4
The number that both 7 and 8 can go into evenly is 56.
4, 4 is the greatest number that goes into both 4 and 8
As 8 is even, and 3 is odd, I think only 1 can go into both.
They can go into all integer multiples of 8.
The common factors of 64 and 100 are 1, 2, 4, and 8 .
They can go into 8*4*9 = 288. That is not the smallest such number, but that was not the question.