Browse math mysteries
Every case is printable and verified to have one unique solution.
Grade 1
The Big Brick Bandit
Grade 1Place valueAdditionSubtractionSkip counting
The Case of the Missing Yellow Minion Spaceship
Grade 1AdditionSubtractionSkip countingPlace value
The Camp Grizzly Valley Mystery
Grade 1SubtractionAdditionPlace valueMultiplication
The Case of the Missing Yarn Ball
Grade 1AdditionSubtractionSkip countingPlace value
The Case of the Missing Golden Bone
Grade 1AdditionSubtractionSkip countingPlace value
Grade 2
The Great Milk Mystery
Grade 2Place valueWord problemsAdditionSubtraction
The Mystery of the Glitter Pearl
Grade 2Place valueAdditionSubtractionSkip counting
The Mystery of the Golden Wrench
Grade 2Place valueAdditionSubtractionMultiplication
The Mystery of the Blocky Fossil
Grade 2AdditionSubtractionSkip countingPlace value
The Case of the Missing Sparkle Horn
Grade 2Place valueWord problemsAdditionSubtraction
The Case of the Cosmic Caper
Grade 2Place valueAdditionSubtractionSkip counting
The Great Castle Crumble
Grade 2Place valueAdditionSubtractionSkip counting
The Golden Squeaker Caper
Grade 2Place valueAdditionSubtractionSkip counting
The Great Hat Town Caper
Grade 2AdditionSubtractionRoundingPlace value
The Kitty Cafe Mystery
Grade 2Place valueAdditionSubtractionSkip counting
The Great Toy Room Mix-Up
Grade 2AdditionSubtractionSkip countingPlace value
The Great Toy Factory Mix-Up
Grade 2Place valueAdditionSubtractionSkip counting
Case of the Super Bad Superhero
Grade 2Place valueAdditionSubtractionSkip counting
Case of the Super Bad Superhero
Grade 2Place valueAdditionSubtractionSkip counting
Grade 3
The Orbit Arena Glitch
Grade 3AdditionSubtractionBar modelsMultiplication
The Case of the Lost Golden Propeller
Grade 3MultiplicationRoundingAdditionSubtraction
The Case of the Missing Meteorite
Grade 3RoundingWord problemsAdditionSubtraction
The Championship Trophy Heist
Grade 3RoundingBar modelsWord problemsAddition
The Case of the Missing Meteor Fragment
Grade 3RoundingWord problemsAdditionSubtraction
The Golden Cup Caper
Grade 3RoundingWord problemsAdditionSubtraction
Case of the Super Bad Superhero
Grade 3RoundingWord problemsAdditionSubtraction
The Golden Cup Mystery
Grade 3RoundingWord problemsAdditionSubtraction
The Case of the Golden Cup Mystery
Grade 3RoundingWord problemsBar modelsAddition
The World Cup Trophy Caper
Grade 3RoundingWord problemsBar modelsAddition
The Case of the Missing Golden Cleat
Grade 3RoundingWord problemsBar modelsAddition
The Golden Cup Mystery
Grade 3RoundingWord problemsBar modelsAddition
The Case of the Golden Soccer Ball
Grade 3RoundingWord problemsBar modelsAddition
The Great CAL Blue Camp Mystery
Grade 3SubtractionMultiplicationSkip countingRounding
The Golden Football Mystery
Grade 3SubtractionMultiplicationSkip countingRounding
The Championship Football Caper
Grade 3RoundingAdditionSubtractionMultiplication
The Cal Blue Camp Caper
Grade 3SubtractionMultiplicationSkip countingRounding
The Cal Blue Football Caper
Grade 3MultiplicationSkip countingSubtractionPlace value
The Case of the Missing Camp Cup
Grade 3MultiplicationRoundingPlace valueAddition
The Camp Golden Bear Trophy Mystery
Grade 3Place valueMultiplicationRoundingAddition
The Case of the Missing Golden Cup
Grade 3MultiplicationPlace valueAdditionSubtraction
The Golden Cup Mystery
Grade 3RoundingAdditionSubtractionMultiplication
The Case of the Missing World Cup
Grade 3RoundingAdditionSubtractionMultiplication
The Case of the Missing World Cup Trophy
Grade 3RoundingAdditionSubtractionMultiplication
The Golden Boot Heist
Grade 3RoundingAdditionSubtractionMultiplication
The Golden Boot Mystery
Grade 3RoundingAdditionSubtractionMultiplication
The World Cup Cleat Caper
Grade 3RoundingAdditionSubtractionMultiplication
The Case of the Missing Golden Boot
Grade 3RoundingAdditionSubtractionMultiplication
The Cup Final Caper
Grade 3RoundingAdditionSubtractionMultiplication
Case of the Super Bad Superhero
Grade 3RoundingAdditionSubtractionMultiplication
The Golden Cup Caper
Grade 3RoundingAdditionSubtractionMultiplication
The Mystery of the World Cup Trophy
Grade 3RoundingAdditionSubtractionMultiplication
The Junior World Cup Trophy Heist
Grade 3Place valueAdditionSubtractionMultiplication
The Case of the Ruined Rendezvous
Grade 3RoundingAdditionSubtractionMultiplication
The Great Starship Sabotage
Grade 3RoundingAdditionSubtractionMultiplication
The Phantom of Whispering Pines
Grade 3RoundingAdditionSubtractionMultiplication
The Sabotage of the Salty Sword
Grade 3RoundingAdditionSubtractionMultiplication
The Mystery of the Missing Golden Compass
Grade 3RoundingAdditionSubtractionMultiplication
The Mystery of the Starlight Bandit
Grade 3RoundingAdditionSubtractionMultiplication
The Case of the Star-Swiped Snacks
Grade 3RoundingAdditionSubtractionMultiplication
The Mystery of the Astro-Dome Bandit
Grade 3RoundingAdditionSubtractionMultiplication
The Case of the Bone Bandit
Grade 3RoundingAdditionSubtractionMultiplication
The Championship Soccer Caper
Grade 3RoundingAdditionSubtractionMultiplication
The Case of the Missing Golden Boot
Grade 3RoundingAdditionSubtractionMultiplication
The Case of the Missing Soccer Trophy
Grade 3RoundingAdditionSubtractionMultiplication
The Case of the Crumbling Goalposts
Grade 3RoundingAdditionSubtractionMultiplication
The Golden Cleat Caper
Grade 3RoundingAdditionSubtractionMultiplication
The Golden Cleat Mystery
Grade 3RoundingAdditionSubtractionMultiplication
Grade 4
The Mystery of the Shattered Beacon
Grade 4Place valueAdditionSubtractionWord problems
The Whispering Temple Mystery
Grade 4RoundingAdditionSubtractionMultiplication
The Case of the Missing Rainbow Orchid
Grade 4AdditionRoundingSubtractionMultiplication
The Redstone Rampage
Grade 4RoundingWord problemsAdditionSubtraction
The Great Golden Tuna Caper
Grade 4AdditionRoundingSubtractionMultiplication
The Case of the Missing Championship Cup
Grade 4Skip countingWord problemsMultiplicationRounding
The World Cup Ticket Heist
Grade 4MultiplicationRoundingFractions of a numberBar models
The Great World Cup Ticket Heist
Grade 4MultiplicationRoundingFractions of a numberBar models
The Great World Cup Ticket Caper
Grade 4MultiplicationRoundingFractions of a numberBar models
The Great Ticket Heist
Grade 4Fractions of a numberBar modelsWord problemsRounding
The Space Station Shenanigans
Grade 4RoundingWord problemsAdditionSubtraction
The Astro Delta Heist
Grade 4RoundingBar modelsAdditionSubtraction
The Great Blue Camp Football Mystery
Grade 4MultiplicationSkip countingSubtractionPlace value
The Pop Star Microphone Mystery
Grade 4RoundingAdditionSubtractionMultiplication
The Case of the Stolen World Cup
Grade 4RoundingAdditionSubtractionMultiplication
The Golden Cup Caper
Grade 4SubtractionMultiplicationRoundingSkip counting
The Championship Cup Caper
Grade 4Skip countingRoundingMultiplicationSubtraction
The Golden Trophy Mystery
Grade 4RoundingAdditionSubtractionMultiplication
The Great World Cup Trophy Heist
Grade 4RoundingAdditionSubtractionMultiplication
The World Cup Trophy Heist
Grade 4RoundingAdditionSubtractionMultiplication
The Case of the Frozen Trophy
Grade 4RoundingAdditionSubtractionMultiplication
The Case of the Missing Golden Hubcap
Grade 4RoundingAdditionSubtractionMultiplication
The Championship Cup Caper
Grade 4RoundingAdditionSubtractionMultiplication
The Great Trophy Heist of 2026
Grade 4MultiplicationSubtractionRoundingPlace value
Case of the Demolition Derby Bandit
Grade 4RoundingAdditionSubtractionMultiplication
The Case of the Smelly-Sock Bandit
Grade 4RoundingAdditionSubtractionMultiplication
Grade 5
Grade 6
The Cosmic Crystal Caper
Grade 6Place valuePercentagesExponentsOrder of operations
The Saboteur of Stellar Outpost Nova
Grade 6Place valuePercentagesExponentsOrder of operations
The Telescope Trouble on Star Base Alpha
Grade 6Place valuePercentagesExponentsOrder of operations
The Great Lunar Sabotage
Grade 6PercentagesExponentsOrder of operationsMultiplication
Grade 7
The Case of the Missing Golden Horn
Grade 7Fractions of a numberWord problemsMultiplicationIntegers
The Great Trophy Swap
Grade 7MultiplicationPlace valueIntegersPercentages
The Great Souffle Sabotage
Grade 7IntegersPercentagesOrder of operationsExponents
The Grand Arena Heist
Grade 7IntegersPercentagesOrder of operationsExponents
The Titan Foundry Heist
Grade 7IntegersPercentagesOrder of operationsExponents
Grade 8
Grade 9
The Echo Caverns Robbery
Grade 9Two-step equationsExponentsSquare rootsIntegers
The Lost Astrolabe of Skylandia
Grade 9AdditionSubtractionMultiplicationRounding
The Heist of the Paragon Diamond
Grade 9Fractions of a numberWord problemsRoundingTwo-step equations
The Great Carat Caper
Grade 9RoundingWord problemsFractions of a numberTwo-step equations
The Biodome Heist on Ares-V
Grade 9AdditionTwo-step equationsExponentsSquare roots
The Robo-Expo Blackout
Grade 9Two-step equationsExponentsSquare rootsIntegers
The Great Spark Core Heist
Grade 9RoundingAdditionSubtractionMultiplication
Grade 10
The Mystery of the Whispering Temple
Grade 10Pythagorean theoremSquare rootsExponentsOrder of operations
The Heist of the Prism Heart
Grade 10Fractions of a numberWord problemsRoundingPythagorean theorem
The Lost Compass of Cutlass Cay
Grade 10RoundingBar modelsWord problemsMultiplication
The Mystery of the Golden Anchor
Grade 10Fractions of a numberWord problemsBar modelsRounding
The Lost Treasure of Cutlass Cay
Grade 10Fractions of a numberWord problemsRoundingPythagorean theorem
The World Cup Trophy Caper
Grade 10Pythagorean theoremSquare rootsExponentsOrder of operations
The Pyralis Dragon Egg Mystery
Grade 10Pythagorean theoremSquare rootsExponentsOrder of operations
Case of the Glitch Phantom
Grade 10Pythagorean theoremSquare rootsExponentsOrder of operations