Time Concepts (12-hr & 24-hr formats, Elapsed Time)

Convert 3:00 PM to 24 hr format.

• 12:00

• 15:00

• 18:00

• 03:00

Answer explanation

3:00 PM is equivalent to 15:00 in 24 hr format, where 15 represents 3 PM in the afternoon.

What is 18:30 in 12 hr format?

• 6:30 AM

• 6:30 PM

• 12:30 PM

• 8:30 PM

Answer explanation

18:30 is equivalent to 6:30 PM in 12 hr format. The correct choice is 6:30 PM.

The time 23:45 is in 24 hr format, what time is it in 12 hr format?

• 10:45 AM

• 1:45 PM

• 12:45 PM

• 11:45 PM

Answer explanation

To convert 23:45 from 24 hr to 12 hr format, subtract 12 from the hour. So, 23 - 12 = 11. Therefore, the time is 11:45 PM.

If it takes 2 hours and 45 minutes to complete a task starting at 9:30 AM, what time will it be when the task is completed?

• 11:15 AM

• 12:15 PM

• 12:30 PM

• 1:15 PM

Answer explanation

Starting at 9:30 AM, 2 hours and 45 minutes later will be 12:15 PM. Therefore, the task will be completed at 1:15 PM, which is the correct answer.

If an event started at 5:45 AM and ended at 1:18 PM, what is the elapsed time?

• 6 hours 35 minutes

• 7 hours 33 minutes

• 7 hours 43 minutes

• 6 hours 42

Answer explanation

To find the elapsed time, subtract the start time from the end time: 1:18 PM - 5:45 AM = 7 hours 33 minutes.

Amar and his friends went to a movie that started at 4:45 PM and ended at 6:20 PM. How long was the movie?

• 1 hour 35 minutes
• 1 hour 25 minutes
  
  
  

• 2 hours 15 minutes

• 1 hour 45 minutes

What is elapsed time?

• How much time you have to do something.

• How much time has passed

• A past time

Answer explanation

How much time has passed

What time is shown on the clock?

• 6:18

• 4:30

• 6:15

• 3:30

Answer explanation

The correct time shown on the clock is 3:30, as the hour hand is on the 3 and the minute hand is on the 6, indicating 30 minutes past the hour.

What is the elapsed time between these two clocks?

• 1 hour 10 minutes

• 1 hour

• 10 minutes

• 20 minutes

Answer explanation

The elapsed time between the two clocks is 20 minutes, as the difference in time shown by the clocks is 20 minutes.

Tim started running the race at 3:20. It took him exactly one hour to finish the race. What time did he finish? 

• 3:30

• 4:20

• 5:20

• 4:00

Answer explanation

Tim started at 3:20 and took 1 hour to finish, so he finished at 4:20. Therefore, the correct answer is 4:20.