Problem - 4718
$\textbf{Haystacks}$
A farmer has five haystacks in one field and four haystacks in another. How many haystacks will he have if he combines them all in one field?$\textbf{Answer}$
One big haystack.
$\textbf{Note}$
A problem is a brain teaser for a reason. It cannot be a simple math of $5+4=9$ without a trap.