A calendar allows us to keep track of the days, weeks, and months of a year.
Calendars are usually in the chart forms with rows and columns.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
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.