Using a suitable pattern, evaluate the following:

$(99999999{)}^2$

Using a suitable pattern, evaluate the following:

$(111111{)}^2$

Using a suitable pattern, evaluate the following:

$(66666667{)}^2$

Using a suitable pattern, evaluate the folowing:

$(6667{)}^2$

Give reasons why the following numbers are not perfect squares.

$23,647$

Give reasons why the following numebrs are not perfect squares.

$14,080$

Give reasons why the following numbers are not perfect squares.

$7,98,000$

Give reasons why the following numbers are not perfect squares,

$45,00,000$

Give reasons why the following numbers are not perfect squares.

$10,583$