Determine Time by Rounding to Nearest Hour
For adding or subtracting time, we can make use of the method rounding.
- If the number of minutes in the time to be added (or subtracted) is 30 or more, round the time up to the next hour.
- If the number of minutes in the time to be added (or subtracted) is less than 30, round the time down to the previous hour.
For example: Let’s say we need to add 1 hour and 55 minutes to 5:15.
Here, as the number of minutes is more than 30, round 1 hour 55 minutes to 2 hours (5 extra minutes).
5:15 + 2 hours = 7:15
Since we added 5 extra minutes, we will now subtract 5 minutes.
7:15 – 5 mins = 7:10
So, 5:15 + 1 hour and 55 minutes = 7:10.
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The correct answer is
The smallest number is the one that comes first while counting.
To arrange the given numbers in order from smallest to greatest, find the smallest number among all the given numbers.
21 is the smallest number.