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Steps to add minutes and seconds:

3. If the seconds are 60 or more, then, decrease the seconds by 60 and increase the minutes by 1.

(Since, 1 minute = 60 seconds)

3 minutes 47 seconds + 2 minutes 23 seconds = ?

3 minutes + 2 minutes = 5 minutes

47 seconds + 23 seconds = 70 seconds

So, 3 minutes 47 seconds + 2 minutes 23 seconds = 5 minutes 70 seconds

Now, notice that 70 seconds are more than 60 seconds.
So, decrease the seconds by 60 and increase the minutes by 1:

70 seconds – 60 seconds = 10 seconds
5 minutes + 1 minute = 6 minutes

So, 3 minutes 47 seconds + 2 minutes 23 seconds = 6 minutes 10 seconds.

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### Help

##### Remember :

The smallest number is the one that comes first while counting.

##### Solution :

To arrange the given numbers in order from smallest to greatest, find the smallest number among all the given numbers.

21,27,23

21 is the smallest number.