Time Concepts (12-hr & 24-hr formats,Time Zone, 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.

If it's 23:45 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?

How many time zones are there in the world?

• 24

• 12

• 6

• 48

Answer explanation

There are 24 time zones in the world, each roughly corresponding to 15 degrees of longitude. This allows for a full rotation of 360 degrees, resulting in 24 time zones.

if you cross a time zone line going east you must.....

• subtract an hour from your watch

• add an hour to your watch

Answer explanation

If you cross a time zone line going east, you must add an hour to your watch, as you are moving ahead in time.

Approximately how wide is each time zone, in degrees?

• 5^o

• 10^o

• 15^o

• 20^o

Answer explanation

Each time zone covers approximately 15 degrees of longitude on the Earth's surface.

It is 09:30 in Paris, France now. Philippines is 6 hours ahead of France. What time is it in the Philippines?

• 15:00

• 15:30

• 16:30

• 14:30

Answer explanation

Since Philippines is 6 hours ahead of France, it is 15:30 in the Philippines when it is 09:30 in Paris, France.