Browse math mysteries
Every case is printable and verified to have one unique solution.
Grade 1
The Cosmic Cape Caper
Grade 1AdditionSubtractionSkip countingPlace value
The Astro-Base Adventure
Grade 1AdditionSubtractionSkip countingPlace value
The Great Treehouse Caper
Grade 1AdditionSubtractionSkip countingPlace value
The Astro-Station Crystal Caper
Grade 1AdditionSubtractionSkip countingPlace value
The Golden Egg Mystery
Grade 1AdditionSubtractionSkip countingPlace value
The Golden Banana Chase
Grade 1AdditionSubtractionSkip countingPlace value
The Case of the Missing Golden Cup
Grade 1AdditionSubtractionSkip countingPlace value
The Cyber-Reef Caper
Grade 1Place valueAdditionSubtractionSkip counting
The Cyber-Coral Island Mystery
Grade 1Place valueAdditionSubtractionSkip counting
The Case of the Golden Pineapple
Grade 1AdditionSubtractionSkip countingPlace value
The Missing Golden Basketball
Grade 1Place valueAdditionSubtractionSkip counting
The Great Golden Trophy Mystery
Grade 1AdditionSubtractionSkip countingPlace value
Grade 2
The Golden Gear Glitch
Grade 2AdditionPlace valueSubtractionSkip counting
The Great Treehouse Mystery
Grade 2AdditionPlace valueSubtractionSkip counting
The Case of the Golden Spy-Glass
Grade 2Fractions of a numberPlace valueAdditionSubtraction
The Spy Academy Caper
Grade 2MultiplicationPlace valueAdditionSubtraction
The Magic Pearl Mystery
Grade 2AdditionSubtractionSkip countingPlace value
The Great Pearl Heist
Grade 2Place valueAdditionSubtractionSkip counting
The Great Cookie Desert Mystery
Grade 2AdditionSubtractionWord problemsSkip counting
The Mystery of the Coral Crown
Grade 2Place valueSubtractionSkip countingAddition
The Case of the Ruined Spawn
Grade 2AdditionPlace valueSubtractionSkip counting
The Great Barn Escape
Grade 2Place valueWord problemsAdditionSubtraction
The Cosmic Canopy Caper
Grade 2Place valueAdditionSubtractionSkip counting
The Golden Fossil Caper
Grade 2AdditionSubtractionWord problemsMulti-step word problems
The Great Dino Valley Mystery
Grade 2AdditionSubtractionWord problemsMulti-step word problems
Grade 3
The Great Sky Key Caper
Grade 3MultiplicationRoundingAdditionSubtraction
The Sky Pirate Heist
Grade 3MultiplicationRoundingAdditionSubtraction
The Great Server Glitch
Grade 3MultiplicationRoundingAdditionSubtraction
The Case of the Golden Monkey Statue
Grade 3MultiplicationWord problemsRoundingAddition
The Golden Pearl Caper
Grade 3RoundingAdditionSubtractionMultiplication
The Case of the Lost Pearl Crown
Grade 3RoundingAdditionSubtractionMultiplication
The Galactic Amber Heist
Grade 3AdditionSubtractionRoundingBar models
The Case of the Starlight Sabotage
Grade 3Place valueAdditionMultiplicationSkip counting
The Case of the Missing Mega-Core
Grade 3Place valueAdditionMultiplicationSubtraction
The Great Power Core Glitch
Grade 3MultiplicationRoundingAdditionSubtraction
The Canopy Canopy Caper
Grade 3AdditionRoundingSubtractionMultiplication
The Treehouse Spy Caper
Grade 3MultiplicationRoundingAdditionSubtraction
The Case of the Poisonous Pizza
Grade 3MultiplicationMulti-step word problemsWord problemsPlace value
Grade 4
The Big Hoop Catastrophe
Grade 4MultiplicationRoundingAdditionSubtraction
The Cloud Kingdom Caper
Grade 4Place valueRoundingAdditionSubtraction
The Wembley Trophy Mystery
Grade 4MultiplicationWord problemsMulti-step word problemsRounding
The Great Zero-Gravity Trophy Heist
Grade 4MultiplicationAdditionSubtractionRounding
The Golden Monkey Mystery
Grade 4Fractions of a numberRoundingAdditionSubtraction
The Golden Pineapple Mystery
Grade 4MultiplicationAdditionRoundingSubtraction
The Lost Sky-Scepter
Grade 4MultiplicationRoundingBar modelsFractions of a number
The Case of the Missing Diamond Tiara
Grade 4AdditionSubtractionSkip countingRounding
The Championship Trophy Caper
Grade 4RoundingAdditionSubtractionMultiplication
The Great Pepe's Pizza Heist
Grade 4Skip countingMultiplicationRoundingPlace value
The Mystery of the Griefed Beacon
Grade 4AdditionSubtractionMultiplicationRounding
The Mystery of the Cosmic Core
Grade 4RoundingAdditionSubtractionMultiplication
The Cosmic Map Caper
Grade 4Place valueRoundingAdditionSubtraction
The Great Cyber-Dino Heist
Grade 4AdditionRoundingSubtractionMultiplication
The Great World Cup Trophy Heist
Grade 4RoundingAdditionSubtractionMultiplication
The Spawn Point Sabotage
Grade 4RoundingAdditionSubtractionMultiplication
The Great Pumpkin Patch Caper
Grade 4RoundingSubtractionAdditionPlace value
The Great Sky-Snatch Mystery
Grade 4AdditionSubtractionRoundingMultiplication
The Case of the Missing Championship Trophy
Grade 4AdditionRoundingSubtractionMultiplication
The Mystery of the Missing Championship Ball
Grade 4RoundingMulti-step word problemsAdditionSubtraction
The Whispering Vines Mystery
Grade 4Place valueAdditionMultiplicationSkip counting
The Treehouse Mystery
Grade 4MultiplicationRoundingPlace valueAddition
The Mystery of the Missing Telescope
Grade 4RoundingAdditionSubtractionMultiplication
The Lost Temple Mystery
Grade 4RoundingAdditionSubtractionMultiplication
The Great Space Station Scramble
Grade 4RoundingAdditionSubtractionMultiplication
The Cretaceous Reserve Caper
Grade 4RoundingAdditionSubtractionMultiplication
The Mystery of the Missing Golden Trophy
Grade 4MultiplicationRoundingAdditionSubtraction
Grade 5
The Golden Cartridge Glitch
Grade 5Place valueRoundingFractions of a numberMulti-step word problems
The Astra Nebula Sabotage
Grade 5MultiplicationFractions of a numberOrder of operationsRounding
The Mystery of the Lost Golden Compass
Grade 5MultiplicationPlace valueFractions of a numberOrder of operations
The Poison Pizza Puzzle
Grade 5Place valueSkip countingMultiplicationRounding
The Poisonous Pizza Plot
Grade 5Skip countingPlace valueRoundingWord problems
The Dinosaur Island Rescue
Grade 5Fractions of a numberOrder of operationsMultiplicationRounding
The Case of the Golden Pineapple
Grade 5SubtractionMultiplicationRoundingAddition
The Mystery of Whispering Island
Grade 5Place valueAdditionSubtractionMultiplication
The Mars Dome Heist
Grade 5MultiplicationMulti-step word problemsWord problemsFractions of a number
The Case of the Golden Compass
Grade 5Fractions of a numberOrder of operationsMultiplicationRounding
The Golden Baton Heist
Grade 5MultiplicationFractions of a numberOrder of operationsRounding
The Golden Compass Heist
Grade 5Fractions of a numberOrder of operationsMultiplicationRounding
The Hover Island Heist
Grade 5MultiplicationFractions of a numberOrder of operationsRounding
The Championship Ball Caper
Grade 5AdditionSubtractionMultiplicationMulti-step word problems
The Case of the Missing Star-Map
Grade 5Place valueAdditionSubtractionMultiplication
Grade 6
The Golden Tuna Heist
Grade 6Place valueMultiplicationAdditionSubtraction
The Great Robo-Museum Mystery
Grade 6Place valuePercentagesExponentsOrder of operations
The Kyoto Toy Castle Mystery
Grade 6Place valueAdditionSubtractionPercentages
The Toy Museum Mystery
Grade 6Place valuePercentagesExponentsOrder of operations
The Moonbase Mystery
Grade 6PercentagesExponentsOrder of operationsMultiplication
The Mystery of the Golden Pearl
Grade 6Place valueMultiplicationMulti-step word problemsWord problems
The Big League Heist
Grade 6Place valueAdditionSubtractionMultiplication
The Whispering Pines Gate Mystery
Grade 6AdditionSubtractionRoundingMultiplication
The Case of the Midnight Galloper
Grade 6RoundingFractions of a numberMultiplicationWord problems
The Canopy Kingdom Heist
Grade 6Place valueAdditionSubtractionMultiplication
The Neo-Dribble Cyber Mystery
Grade 6PercentagesExponentsOrder of operationsMultiplication
The Sky-Shard Heist
Grade 6PercentagesExponentsOrder of operationsMultiplication
The Great Bolt City Chase
Grade 6MultiplicationPercentagesExponentsOrder of operations
The Great Stable Switcheroo
Grade 6MultiplicationRoundingAdditionSubtraction
The Great Treehouse Heist
Grade 6PercentagesExponentsOrder of operationsMultiplication
The Mystery of the Governor's Pocket Watch
Grade 6Place valueAdditionSubtractionPercentages
The Mystery of the Golden Anchor
Grade 6Place valueRoundingAdditionSubtraction
The Mystery of Mew-lantis
Grade 6PercentagesExponentsOrder of operationsMultiplication
The Great Golden Yarn Mystery
Grade 6PercentagesExponentsOrder of operationsMultiplication
The Case of the Missing MVP Trophies
Grade 6PercentagesExponentsOrder of operationsMultiplication
Grade 7
The Lost Compass of Whispering Winds
Grade 7IntegersPercentagesOrder of operationsExponents
The Airship Academy Mystery
Grade 7IntegersWord problemsMulti-step word problemsPercentages
The Lost Compass of the Sky-Isles
Grade 7IntegersPercentagesOrder of operationsExponents
The Case of the Golden Catnip Scepter
Grade 7IntegersPercentagesOrder of operationsExponents
The Lost Sky Map
Grade 7IntegersPercentagesOrder of operationsExponents
The Case of the Glitched Kibble Vault
Grade 7Place valueAdditionSubtractionMultiplication
The Case of the Golden Cleat
Grade 7Place valueIntegersPercentagesOrder of operations
The Mystery of the Sunken Catnip
Grade 7IntegersPercentagesOrder of operationsExponents
The Great Whisker City Heist
Grade 7IntegersPercentagesOrder of operationsExponents
Grade 8
The Sky-Schooner Showdown
Grade 8ExponentsMulti-step word problemsSquare rootsPythagorean theorem
The Golden Ball Heist
Grade 8ExponentsSquare rootsPythagorean theoremOrder of operations
The Sky-Islands Heist
Grade 8Place valueAdditionMultiplicationRounding
The Great Astrolabe Heist
Grade 8ExponentsSquare rootsPythagorean theoremOrder of operations
The Neo-City Scrap Yard Mystery
Grade 8ExponentsSquare rootsPythagorean theoremOrder of operations
The Mystery of the Golden Compass
Grade 8ExponentsSquare rootsPythagorean theoremOrder of operations
The Skydom Reach Heist
Grade 8ExponentsSquare rootsPythagorean theoremOrder of operations
The Temple Map Mystery
Grade 8Fractions of a numberExponentsSquare rootsPythagorean theorem