$p \Rightarrow q$ can also be written as

Check the validity of the statement given below by the method specified against it.
$p:$ The sum of an irrational number and a rational number is irrational (by contradiction method).

The contrapositive of the statement,"If the side of a square doubles,then its area increases four times",is

Write the converse of the following statement:
If a number $n$ is even,then $n^{2}$ is even.

Which of the following sentences are statements? Give reasons for your answer.
The product of $(-1)$ and $8$ is $8.$

The contrapositive of the statement "If you will work,you will earn money" is ..... .