The document contains 6 math problems from a 7th grade test in Vietnam. Problem 1 involves creating a frequency table and calculating the mean from data on test scores. Problem 2 asks for the length of a ladder needed where the base is 1m from the bottom of a 4m pipe. Problem 3 involves simplifying an algebraic expression and evaluating it for given values. Problems 4-6 involve polynomial expressions, solving equations, and proving properties of triangles.