Question

how would i write the inverse of the following statement: If the number is not divisble by three then the number is not divisible by six

Answer 1

You statement is of the form
\[ A\Rightarrow B\]

With A = "the number is not divisble by three"
and B = "the number is not divisible by six"

The inverse (mathematical sense) of such a proposition is (always) :
\[ \mathrm{not} \; A \; \Rightarrow \mathrm{not} \;B \]
(It may of may not be true)