Consider the table:
Let's find the rule from the table given.
Notice that the given rule makes each number increase.
Try using addition.
2 + 2 = 4
7 + 2 = 9
0 + 2 = 2
3 + 2 = 5
Here, 2 is added each time in the input.
So, the rule is add 2.
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.