This combo set includes 3 worksheets for less than the cost of buying them individually! Includes: Analyzing with Number Properties I and II (Given a statement, classify other related statements as Always True, Always False, or Can't Tell) and III (classify as True/False and if false give a counterexample). These worksheets can be headache-inducing even for a math teacher, but the thought processes involved are especially good at building up analytical muscles around number properties, especially in preparation for upper level standardized tests. Example: "n is even. Is 3n-2 also even?"