Math MysteriesMake a mystery

Adventure Island Math Quest

A free, printable Grade 3 multi-step word problem worksheet. Each problem takes two or three steps to solve. Work them on screen or print the PDF — a teacher/parent answer key is included.

  1. PIRATE GOLD

    Leo is searching for hidden treasure. He finds 4 wooden chests, and each chest has 8 gold coins inside. He gives 5 of the gold coins to his little sister. How many gold coins does Leo have left?

    Answer:

  2. JUNGLE SAFARI

    Maya is feeding baby monkeys in the jungle. She has 3 bags of bananas, and each bag has 10 bananas. She feeds 6 monkeys exactly 4 bananas each. How many bananas does she have left over?

    Answer:

  3. ROCKET MISSION

    Space Cadet Sam is loading fuel crystals into his rocket ship. He puts 6 green crystals and 3 blue crystals into each of his 5 engine boosters. How many fuel crystals does Sam pack in total?

    Answer:

  4. DEEP SEA DIVE

    Nora dives to the ocean floor to search for treasures. She finds 3 giant clams, and each clam contains 6 shiny pearls. On her way back to the submarine, she accidentally drops 4 pearls. How many pearls does she keep?

    Answer:

  5. TREEHOUSE BUILD

    Oliver is building a secret treehouse base. He buys 4 packs of long screws and 2 packs of short screws. Each pack contains 8 screws. How many total screws did Oliver buy?

    Answer:

  6. DINO DIG

    Dr. Elsa is excavating dinosaur fossils in the desert. She finds 6 dinosaur skeletons, and each skeleton has 5 ribs. She also finds 12 loose fossil teeth. How many bones and teeth did she discover altogether?

    Answer:

Show answer key (for grown-ups)
1.Leo is searching for hidden treasure. He finds 4 wooden chests, and each chest has 8 gold coins inside. He gives 5 of the gold coins to his little sister. How many gold coins does Leo have left?27
2.Maya is feeding baby monkeys in the jungle. She has 3 bags of bananas, and each bag has 10 bananas. She feeds 6 monkeys exactly 4 bananas each. How many bananas does she have left over?6
3.Space Cadet Sam is loading fuel crystals into his rocket ship. He puts 6 green crystals and 3 blue crystals into each of his 5 engine boosters. How many fuel crystals does Sam pack in total?45
4.Nora dives to the ocean floor to search for treasures. She finds 3 giant clams, and each clam contains 6 shiny pearls. On her way back to the submarine, she accidentally drops 4 pearls. How many pearls does she keep?14
5.Oliver is building a secret treehouse base. He buys 4 packs of long screws and 2 packs of short screws. Each pack contains 8 screws. How many total screws did Oliver buy?48
6.Dr. Elsa is excavating dinosaur fossils in the desert. She finds 6 dinosaur skeletons, and each skeleton has 5 ribs. She also finds 12 loose fossil teeth. How many bones and teeth did she discover altogether?42

About Math Mysteries

Math Mysteries makes free, printable math for kids ages 6–12 — personalized to what your child is into. Beyond practice sheets like this one, you can generate a full math mystery whodunit (solve the math to catch the culprit), or browse free printable worksheets by grade, skill, and theme. Every puzzle is verified to have one correct answer.

Keep exploring

Free Printable Math Mystery Worksheets (Grades 1–5)
Hundreds of free, printable math mystery worksheets — pick a grade, print the case, and your kid solves math to catch the culprit.
Math Mystery 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.