american math olympiad question

17:47

17:47

2:17

6:12

6:12

8:56

8:29

6:52

8:56

31:32

کوتاه

3:18

3:01

4:42

7:28

1:27

5:00

6:33

4:28

14:21

14:00

14:49

26:50

10:10

27:00

7:13

7:13

11:07

17:59

3:26

4:30

4:02

13:37

3:05

3:43

3:25

3:43

47:27

3:12

9:41