Math CrackersMake a mystery

8th Grade Math Whodunit Worksheets

These free, printable 8th-grade math whodunit worksheets turn arithmetic into a whodunit: your child solves exponents, square roots, the Pythagorean theorem, and order of operations to decode clues and catch the culprit. Every case is verified to have exactly one solution, works on screen or printed, and is free with no login. Make one now →

5 8th grade cases to print

Click any case to solve online or print the PDF + answer key.

More math whodunits

Popular printable cases while we add more 8th grade ones.

Browse more worksheets

By math skill
Addition199Subtraction180Multiplication196Division153Rounding117Place value116Skip counting48Missing addends51Fractions of a number117Percentages23Exponents31Order of operations60Integers18Square roots13Pythagorean theorem12Two-step equations20
By theme
🚀Space33⚽Sports71🐾Animals11🏴‍☠️Pirates84👻Spooky43🦕Dinosaurs10🍪Food & treats4🐉Fantasy10
Other grades
1st grade162nd grade173rd grade464th grade505th grade1076th grade147th grade269th grade310th grade16

FAQ

Are these 8th grade math whodunits free to print?
Yes — free to solve online and free to download as a printable PDF, with a built-in answer key and no login.
How does a math mystery work?
Kids solve math problems to decode clues, then use the clues to cross suspects off a grid until one culprit remains. The math is the key; the mystery is the motivation.
Can I make a new 8th grade case?
Yes. Generate a brand-new mystery in about a minute — pick the grade, reading level, and interests, and it's verified to have exactly one solution before you print it.

Keep exploring

Free Printable Math Whodunit Worksheets (Grades 1–5)
Hundreds of free, printable math whodunit worksheets — pick a grade, print the case, and your kid solves math to catch the culprit.
Math Whodunit Games for a Kid Who Hates Worksheets
An honest guide to detective-style math for kids who groan at drills — what actually works, and when a mystery beats a game.
Detective Math: Story-Driven Practice for Ages 6–12
How whodunit math turns arithmetic into deduction — the method, the research-backed why, and how to start today for free.