This classic riddle asks: If you drop a yellow hat into the Red Sea, what does it become?
The answer is: wet.
The colors in the question are there to distract you. A yellow hat does not turn red simply because it falls into the Red Sea. The important detail is that the hat is being dropped into water.
Once it hits the sea, the hat becomes wet.
The riddle works because the wording encourages you to think about color combinations or geography, but the simplest interpretation is the right one. No matter what color the hat is, if it lands in water, it gets wet.
