Question Video: Telling Time on a Twelve-Hour Clock Using AM and PM | Nagwa Question Video: Telling Time on a Twelve-Hour Clock Using AM and PM | Nagwa

# Question Video: Telling Time on a Twelve-Hour Clock Using AM and PM Mathematics

The clock shows the time at which Liam went to bed. Write down the time using “am” or “pm”.

02:40

### Video Transcript

The clock shows the time at which Liam went to bed. Write down the time using “AM” or “PM.”

We are shown a picture of a clock here, and we’re told that it shows the time at which Liam went to bed. So, we can imagine him going to bed looking up at the wall and seeing this time. What time is it? Well, the long minute hand is pointing up to the number 12. This shows us that it’s a start of a new hour. This is an o’clock time. And we can also see that the hour hand is pointing to the number 10. It’s 10 o’clock. And we can write 10 o’clock as a digital time by writing the hours first, which is 10, and then the number of minutes. And because it’s a new hour, no minutes have gone by yet. So, this is how to write 10 o’clock as a digital time.

Now, we could just write the time like this, but our question tells us we need to write it using AM or PM. In other words, the answer to our question is either going to be 10 o’clock AM or 10 o’clock PM. Do you remember what these little letters stand for? We know that a day is made up of 24 hours. And during this time, the hour hand goes twice all the way around the clock face. It goes round once during the 12 hours in the morning, this is from midnight to midday, and once during the 12 hours from the middle of the day through to midnight. This covers the afternoon, the evening, and the night.

So, we know that Liam’s clock is going to look like this twice in the day. It’s going to show 10 o’clock in the morning, but also there’s a 10 o’clock at night. How can we tell which time is which? This is where the letters AM and PM come in useful. We use the letters AM to represent morning times. These are all the times from midnight until just before noon. And we use the letters PM to represent afternoon and night times. These are all the times from 12 noon until just before midnight.

Now, there’s one piece of information in the first sentence that’s going to help us here. The clock shows the time at which Liam went to bed. Now, unless he’s been awake all night and he’s gone to bed in the morning, which isn’t very common, it’s probably fair to think that Liam has gone to bed at 10 o’clock at night. We know that 10 o’clock AM would be 10 o’clock in the morning. And so, we can say that the time that Liam went to bed is 10 o’clock PM.

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