Question

Observe the given rectangle

How many minimum numbers of rows or columns we need to add to make it a square.

• A. 1 row
• B. 1 column
• C. 2 rows
• D. 2 columns

Answer 1

The correct option is B

1 column

We can observe from the figure that the rectangle has 4 rows and 3 columns.

$4\times 3=12$ dots in it.

For a square, we must have an equal number of rows and columns.

To make it a square we must add one column , i.e., we need to add 4 dots.

Now rows and columns both becomes 4, and the number of the balls becomes $4\times 4=4^2=16$