Question

What will be the number of unit squares on each side of a square graph paper if the total number of unit squares is 256?

Answer 1

Let the number be x. 

Then, number of unit squares = x × x = x²

But total number of unit squares = 256

∴ x² = 256

⇒ x = `sqrt(256)`

= `sqrt(16 xx 16)`

= 16

Hence, the required number of squares is 16.