find the highest common factor for 12

5:57

7:41

کوتاه

1:56

2:41

1:58

10:45

4:11

3:55

2:17

1:56

1:56

3:41

2:48

10:47

2:27

7:46

16:03

17:31

کوتاه

کوتاه

6:38

2:31

9:33

1:49

10:02

3:06

کوتاه

27:55

1:14

9:42

3:51

1:40

3:06

1:23

2:39

1:52

10:23

1:48

4:02