Order of operations riddles. There are our different skill levels, starting with the basics and getting more advanced, great for differentiation. Included:4 worksheets (see the preview for the different levels) Skills included:Using the order of operations with whole numbers.2 of the riddles include exponents.2 of the riddles include parentheses. Common Core State Standards:5.OA.1 Use parentheses, brackets, or braces in numerical expressions, and evaluate expressions with these symbols.6.EE.1 W