jkath is right. its simple.
there are 5 colors and 5 numbers with that color. you are asked to tell the wizrd what color your number is. then you are asked to choose the house that your number is part of. in that house you will find 1 number of each color. You've already told the wizard that your number is pink, then you identify the house as A -- and there is only one pink number there, so you have self-identified what your number is.
Less is not more. More is more and more is fabulous.