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Kiwiland Education

Volume of Cylinders Cones and Spheres | Math Mystery Worksheets | Grades 7–9 | Formulas

$4.50 USD

Seven detective cases put the cylinder, cone and sphere formulas to work — students find the volume of each solid, write the answer in the box beside it, match it to a suspect, and cross suspects off until one is left standing. This no-prep, printable, self-checking Math Mystery keeps 7th, 8th and 9th graders engaged and works for math centers, morning work, homework, early finishers, substitute/relief days, indoor recess, spiral review, and test prep. Each formula gets two cases of its own before the final case mixes all three.

Quick Details

Skill: Volume of cylinders, cones and spheres · Grades: 7–9 · Format: 7 mysteries + full answer keys (printable PDF) · Theme: School detective

The 7 Mysteries

The Water Tank Switch — The school water tanks have been switched, and students find the volume of each cylinder.

The Soup Can Swap — Every can in the cannery has lost its label, and only the cylinder volume tells them apart.

The Sand Pile Shift — Someone moved the sand piles on the building site, so students find the volume of each cone.

The Ice Cream Mix-Up — The cones came out of the freezer wrong and every volume has to be recalculated.

The Gym Ball Bungle — The store room balls are all in the wrong bins, and students find the volume of each sphere.

The Balloon Breakout — The weather balloons broke loose overnight.

The Fun Fair Shuffle — The fun fair props were packed away in a hurry, and this final case mixes all three solids.

Why Teachers Love It

Zero prep — print and teach. The built-in answer keys make every case self-checking, so students get instant feedback and stay motivated. The detective hook pulls in reluctant and struggling learners, and because each solid is isolated before the mixed case, students build the formulas one at a time instead of guessing between them.

Skills Covered

Volume of a cylinder, volume of a cone, volume of a sphere, substituting radius and height into a formula, working with pi, and choosing the right formula when the solids are mixed — plus logical reasoning and deductive elimination as students rule suspects out clue by clue.

What's Included

Printable one-page mystery worksheets, a labelled solid on every problem, suspect line-ups, complete answer keys with the villain marked, and student instructions — all in one PDF.

Best Used For

Volume and geometry practice in math centers, morning work, homework, early finishers, substitute/relief days, indoor recess, spiral review, and test prep for grades 7–9.

More From This Line

Browse every Math Mystery pack, or keep the geometry unit going with Volume of Rectangular Prisms and Volume of Composite Figures.

All of our products are digital downloads — no physical items will be shipped.

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  • Thank you from Kiwiland Education

How Math Mysteries Work

Each Math Mystery resource gives you five one-page cases that turn math practice into a clue-based investigation. Here's exactly how a case plays out.

CASE FILE 5 MYSTERIES

Every set is a ready-to-solve investigation

Students become the math detective. They read a story, crunch the numbers, and use their answers as evidence to rule out suspects — until only the culprit is left standing.

1
STEP 01

Read the Case

Each mystery opens with a short, themed story that sets the scene and tells students exactly what they're trying to find out — who took something, what went missing, or what really happened.

Hooks them in seconds
2
STEP 02

Solve the Problems

Students work through a set of problems built around the target skill. Every answer is a clue — so there's a real reason to get each one right.

Focused skill practice
3
STEP 03

Eliminate Suspects

Students match their answers against the suspect list and cross off names one clue at a time. Wrong math means the wrong suspect — so the activity self-checks as they go.

Self-checking built in
4
STEP 04

Crack the Case

One suspect is left — and students reveal who did it. The payoff makes review feel like a win, and they're ready to start the next case.

The satisfying reveal

See it in action

SOLVE A CLUEAnswer = 576
MATCH THE ANSWER576 = Bianca
CROSS OFFBianca
No apps. No logins. No prep. Just print, hand out, and let them investigate.

New to the format? Read What Is a Math Mystery? for how they work and how to run one in class.

Why Teachers Use Math Mysteries

Skill practice that feels like a case worth solving — and a download that quietly does a lot of your planning for you.

5one-page cases per set
0prep or setup time
color & black-and-white
answer keys included

Five Mysteries in One

Every download includes five separate one-page cases — enough for a full week of practice, a center rotation, or a sub-day backup that's always ready to go.

Truly No-Prep

No cutting, laminating, apps, or logins. Print in full color or black-and-white and hand them straight out — that's the whole setup.

Self-Checking by Design

Students need the right answers to rule out the right suspects, so accuracy matters — and the included answer keys mean no grading for you.

Fits Any Routine

Use one case as a morning warm-up, or spread the five across the week for centers, partner work, early finishers, or intervention.

Keeps Students Hooked

The mystery format gives even reluctant mathematicians a reason to keep solving. Review starts to feel like a game, not another worksheet.

Differentiation-Friendly

Great for on-level practice, an extension for advanced students, or a targeted review pass for anyone who needs another go at the skill.

NO PREP PRINT & GO ANSWER KEYS INCLUDED

What's in every Math Mystery set

5 full-color mysteries 5 black-and-white versions 5 complete answer keys Print-and-go teacher page Bonus coloring page
Practice that feels like a case worth cracking.

Frequently Asked Questions About Math Mysteries

Printable Math Mystery worksheets that turn math practice into clue-based detective investigations.

Is this Math Mystery a digital activity?

No. This is a printable PDF resource. Students complete the Math Mystery on paper. No physical item will be shipped.

Do students need apps, locks, passwords, or logins?

No. Students do not need apps, locks, passwords, or logins. Teachers can print the pages and use the Math Mystery straight away.

How do students solve the Math Mystery?

Each resource includes five one-page cases. In each one, students solve the math problems and use their answers to eliminate suspects until only one remains and the case is cracked.

Can this Math Mystery be used for sub plans?

Yes. Math Mysteries work well for sub plans because students can work through the clues independently, with a partner, or in small groups.

Can this Math Mystery be used for homeschool?

Yes. This printable Math Mystery can be used for homeschool lessons, tutoring, review practice, enrichment, or extra math support.

Will this work for early finishers or math centers?

Yes. Math Mysteries are a good fit for early finishers, math centers, small groups, independent work, review lessons, and extra practice activities.



Volume of cylinders cones and spheres math mystery worksheets for grades 7 to 9, printable pack

Volume of Cylinders Cones and Spheres | Math Mystery Worksheets | Grades 7–9 | Formulas

$4.50

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