are these clock correct?
12:10: shi er dian shi fen

2:30: liang dian ban

6:45: qi dian cha yi ke

9:50: shi dian cha shi fen

12:00: shi er dian

11:15: yi shi dian yi ke

12:20: shi er dian er shi fen

7:30: qi dian ban

8:55: jiu dian cha wu fen

10:35: shi dian san shi wu fen

4:25: si dian er shi wu fen

11:05: yi shi dian ling wu fen

Question

are these clock correct?
12:10: shi er dian shi fen

2:30: liang dian ban

6:45: qi dian cha yi ke

9:50: shi dian cha shi fen

12:00: shi er dian

11:15: yi shi dian yi ke

12:20: shi er dian er shi fen

7:30: qi dian ban

8:55:  jiu dian cha wu fen

10:35: shi dian san shi wu fen

4:25: si dian er shi wu fen

11:05: yi shi dian ling wu fen

Answer

Everything seems fine except the last one, 11:05 十一点五分，and the other one with eleven, which is 十一 and not yishi. When there's a zero, it doesn't have to be expressed with ling 零.
Hope this helped!

Answer

Hello emiko=] 
For the last one, 11:05, it should be shi yi dian ling wu fen. Eleven reads as "shi yi" which refers to 10 (shi) and 1 (yi) in Chinese. In terms of the zero, it is still understandable if you don't say it, which in this case  will be "shi yi dian wu fen", but normally people will express the zero=] Hope that would help