Question

How would you categorize the number `\frac{\sqrt{36}}{9}`?

Answer 1

Rational = from ratio (division) of whole numbers

Even though there is a square root involved `root 2 36 = 6`, which is a whole number.
So the number can be written as a division between whole numbers `6/9` which is the definition of 'rational'
(it can even be reduced to `2/3`)