This worksheet helps students practice with the concept of function notation and evaluating functions, in addition to answering a fun riddle based on their answers - students are given three functions, in the notation of f(x), g(x) and h(x)- students substitute the given values into the respective function, then evaluate- each answer will correspond to a letter in the answer of the riddle "Why is six afraid of seven?"- once all questions have been completed, the answer to the riddle will be show