CAT 2024 Slot 1 QA · Question 7

Consider two sets $A=\{2,3,5,7,11,13\}$ and $B=\{1,8,27\}$. Let $f$ be a function from $A$ to $B$ such that for every element $b$ in $B$, there is at least one element $a$ in $A$ such that $f(a)=b$. Then, the total number of such functions $f$ is