The correct answer to this open question is the following.
It seems that the questions need more context or some reference.
Are you smarter than a preschooler? Regarding what? In a comparison of what?
Generally speaking, of course, an older student has learned more things and knows more than a preschooler. An adult has more experience and knowledge that children. The information that a preschooler receives cannot be compared with other information that is taught in the following grades or levels.
Probably this question has to be followed by another question or activity to prove your intelligence.