Rewrite the following statement with if-then in five different ways conveying the same meaning. If a natural number is odd, then its square is also odd.

Explanation

if p then q

`->` `p =>q` : a natural no is odd implies that its square is odd

`->` `nq => np` : if square of natural no is not odd then all the natural no is not odd.

`->` q is necessary condition for p : the square of natural no being odd is necessary condition for the no to be odd

`->` p is sufficient condition for q : a no is odd is sufficient to say its square is odd

`->` p only if q : a natural no is odd only if its square is odd