Number Detectives is an entertaining series of 40 math mysteries with clues to determine which number is the guilty culprit. This set is all about basic math and is perfect to review regularly and stay current with math skills and terminology. Written in a Task Card format, it can easily be used for morning work, centers or "I've finished early" work. A great review in a fun engaging way. Skills reviewed: Adding/Subtracting, Even/Odd, Money, Basic Geometry, Greater than/Less than, Variables and more. Includes an Answer key on the back as well as a quick reference guide to quickly see what skills are referenced for each case card.