Question

find the common factor of

a)20, 24, and 32

b)25, 40 and 75​

Answer 1

20
1,20
2,10
4,5

24
1,24
2,12
3,8
4,6

32
1,32
2,16
4,8

So the highest common factor is 4

25
1,25
5,5

40
1,40
2,20
4,10
5,8

75
1,75
3,25
5,15

So the highest common factor is 5

Answer 2

The common factor of B is 4.
The common factor of B is 5.