Time

nine

19:30 - 10:30 = 09:00

01:30 + 07:30 = 09:00

nearly quarter past five in the afternoon

5:13 pm

1/2 hour less than 12 hours

11:30 = 19:00 - 07:30

10.5 hours

10 hours and 15 minutes.

155 = 60 + 60 + 35

two hours thirty-five minutes

half past four

4:30 p.m.

16:30 hours

six and a half

16:30 - 10:00 = 06:30

To convert 2140 minutes into hours, divide by 60 (since there are 60 minutes in an hour). Doing the calculation: 2140 ÷ 60 = 35.67 hours. This means there are 35 hours and approximately 40 minutes in 2140 minutes.

9 hours 20 minutes

14:00 - 04:40 = 09:20 = 0:20 + 07:00 + 02:00

Six and a quarter hours.

1680 ÷ 60 = 28 minutes
Note, there are 60 seconds in 1 minute.

It is called "chronological order".

21 hours

Anything from just over 36 hours (23:59 on Tuesday to 12:01 on Thursday) to just under 60 hours (1201 on Tuesday to 23:59 on Thursday).

Anything from just over 24 hours (23:59 on Tuesday to 00:01 on Thursday) and 48 hours (1201 on Tuesday to 23:59 on Thursday)

It is 7 hours.

As there are 60 seconds in a minute, divide by 60. It goes in 5 times with a remainder of 30, so that is 5 minutes and 30 seconds.

1275

fourteen and a half
20:00 - 05:30 = 14:30
0:30 + 6:00 + 8:00 = 14:30

nine
18:30 - 09:30 = 09:00
0:30 + 2:00 + 6:30 = 9:00

That would be 69.44411 Days or 1666.66666 Hours or (duh!) 100,000 minutes!

two and three quarters

10:45 - 08:00 = 02:45

8 hours, 10 minutes

The question does not say 15 January in which year!