16:35 - It's twenty five minutes to five.

15:40 -  It's twenty minutes to four.

 22:40 - It's twenty minutes to eleven.

   2:15 - It's a quarter past two.

12:25  - It's twenty five minutes past twelve.

Verified answer

16:35--Twenty five to five--Thirty five past four

15:40--Forty past three--Twenty to four 

22:40--Forty past ten--Twenty to eleven 

2:15--Quarter past two

12:25--Twenty five past twelve