🐱 CatsGrade 3Reading: grades 3-4MultiplicationRoundingAdditionSubtractionDivision

The Great Purrville Diamond Caper

Someone snatched the Golden Mouse Statue from the museum! The intruder left behind soft fur and strange clues. Detective Whiskers needs your help to crack the case.

Suspects

Possible suspects

Cross off a row as each clue rules it out. On screen, tap a row.

21 of 21 still in play

Name	Special Gadget	Secret Skill	Paw Preference	Fur Color	Weakness
Shadow	Feather Wand	Wall Climb	Left Paws	Black Fur	Cardboard Boxes
Sylvester	Smoke Bomb	High Jump	Left Paws	Calico Fur	Cardboard Boxes
Luna	Feather Wand	Speed Dash	Right Paws	Calico Fur	Cardboard Boxes
Cleo	Grappling Hook	Silent Paws	Right Paws	Calico Fur	Cardboard Boxes
Simba	Feather Wand	High Jump	Right Paws	Calico Fur	Cardboard Boxes
Nala	Feather Wand	Speed Dash	Right Paws	Calico Fur	Milk Saucers
Peanut	Feather Wand	Night Vision	Right Paws	Ginger Fur	Squeaky Toys
Jasper	Catnip Bomb	High Jump	Left Paws	Calico Fur	Cardboard Boxes
Ziggy	Smoke Bomb	Wall Climb	Right Paws	Calico Fur	Cardboard Boxes
Mochi	Grappling Hook	Night Vision	Right Paws	Ginger Fur	Squeaky Toys
Oreo	Smoke Bomb	High Jump	Right Paws	Calico Fur	Cardboard Boxes
Bella	Laser Pointer	Night Vision	Right Paws	Calico Fur	Squeaky Toys
Tom	Catnip Bomb	Night Vision	Right Paws	Ginger Fur	Squeaky Toys
Mittens	Smoke Bomb	Night Vision	Left Paws	Calico Fur	Cardboard Boxes
Oliver	Laser Pointer	Wall Climb	Right Paws	Calico Fur	Squeaky Toys
Boots	Smoke Bomb	Night Vision	Right Paws	Ginger Fur	Cardboard Boxes
Garfield	Smoke Bomb	Speed Dash	Left Paws	Calico Fur	Milk Saucers
Loki	Feather Wand	Speed Dash	Right Paws	Ginger Fur	Cardboard Boxes
Milo	Grappling Hook	Night Vision	Left Paws	Black Fur	Cardboard Boxes
Smokey	Smoke Bomb	Speed Dash	Right Paws	Ginger Fur	Cardboard Boxes
Tiger	Grappling Hook	Speed Dash	Left Paws	Ginger Fur	Milk Saucers

Clue 1

Multiplication facts (1-12)

To decrypt the laser security log, count the total beam triggers arranged in equal rows across the museum hall.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

144

110

144

2 × 8 =T

11 × 10 =P

5 × 3 =N

7 × 9 =H

1 × 6 =L

7 × 5 =V

12 × 12 =A

9 × 3 =S

8 × 8 =D

2 × 7 =O

2 × 11 =W

11 × 8 =I

2 × 10 =E

0/13 letters found

Clue 2

Rounding

The museum scale registered the thief's weight, but the digital display rounded the number to the nearest ten.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

2000

700

6000

200

400

3000

2000

4000

300

700

3000

2000

4000

6000

700

400

6000

200

3000

4000

700

300

200

5000

4000

Round 1,953 to the nearest thousandW

Round 5,230 to the nearest thousandD

Round 228 to the nearest hundredE

Round 62 to the nearest tenP

Round 363 to the nearest hundredS

Round 88 to the nearest tenG

Round 700 to the nearest hundredT

Round 5,662 to the nearest thousandN

Round 3,569 to the nearest thousandR

Round 19 to the nearest tenO

Round 26 to the nearest tenI

Round 339 to the nearest hundredH

Round 3,298 to the nearest thousandA

0/13 letters found

Clue 3

Addition

Officer Whiskers gathered all the catnip treats dropped along the escape trail and tallied them together.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

413

971

262

429

971

729

965

429

346

853

913

429

931

380

482

971

729

429

603

429

913

482

573

355

429

913

482

573

355

569

196 + 217 =V

532 + 399 =P

460 + 393 =T

163 + 99 =L

116 + 230 =S

441 + 288 =N

355 + 610 =W

163 + 319 =D

139 + 216 =O

532 + 381 =R

332 + 241 =B

338 + 231 =X

258 + 171 =A

386 + 585 =I

217 + 163 =E

386 + 217 =C

0/16 letters found

Clue 4

Subtraction

The guards compared the total number of cat toys in the vault before and after the robbery to find the difference.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

704

403

873

403

573

873

258

325

403

894

118

575

404

704

573

730

482

258

573

118

894

575

440

730

873

546

573

403

404

403

998 - 294 =D

526 - 86 =R

748 - 345 =E

971 - 398 =C

1062 - 168 =F

365 - 247 =O

334 - 76 =I

1140 - 267 =T

526 - 201 =V

859 - 284 =U

452 - 48 =N

758 - 276 =L

780 - 50 =A

861 - 315 =S

0/14 letters found

Clue 5

Division facts (1-12) — the last clue

To share the recovered clue cards equally among the detective teams, divide them into equal groups.

First solve each problem. Then find each answer in the list below and cross that sentence out. One sentence will be left — that's exactly what the villain did!

Step 1 — solve these

24 ÷ 4 = ?

84 ÷ 7 = ?

72 ÷ 9 = ?

10 ÷ 1 = ?

3 ÷ 1 = ?

44 ÷ 4 = ?

40 ÷ 10 = ?

10 ÷ 10 = ?

9 ÷ 1 = ?

77 ÷ 11 = ?

10 ÷ 5 = ?

Step 2 — cross out the sentence with each answer

1.The villain waved a shiny feather wand, then navigated the dark room using night vision.

2.The villain distracted the guards with a laser pointer, then snuck past quietly using silent paws.

3.The villain waved a shiny feather wand, then snuck past quietly using silent paws.

4.The villain waved a shiny feather wand, then scrambled up the wall using wall climb.

5.The villain waved a shiny feather wand, then sprinted away using a speed dash.

6.The villain vanished behind a thick smoke bomb, then scrambled up the wall using wall climb.

7.The villain tossed a smelly catnip bomb, then sprinted away using a speed dash.

8.The villain vanished behind a thick smoke bomb, then cleared the high fence with a high jump.

9.The villain distracted the guards with a laser pointer, then scrambled up the wall using wall climb.

10.The villain swung across the hall with a grappling hook, then cleared the high fence with a high jump.

11.The villain tossed a smelly catnip bomb, then cleared the high fence with a high jump.

12.The villain waved a shiny feather wand, then cleared the high fence with a high jump.

Solve it

Name the culprit

Choose the one suspect left standing.

Answer Key — The Great Purrville Diamond Caper

Culprit: Luna (Feather Wand · Speed Dash · Right Paws · Calico Fur · Cardboard Boxes)

Clue 1 (Multiplication facts (1-12)): "THE VILLAIN DOES NOT HAVE SILENT PAWS"
2 × 8 = 16 (T) · 11 × 10 = 110 (P) · 5 × 3 = 15 (N) · 7 × 9 = 63 (H) · 1 × 6 = 6 (L) · 7 × 5 = 35 (V) · 12 × 12 = 144 (A) · 9 × 3 = 27 (S) · 8 × 8 = 64 (D) · 2 × 7 = 14 (O) · 2 × 11 = 22 (W) · 11 × 8 = 88 (I) · 2 × 10 = 20 (E)
Clue 2 (Rounding): "WITNESS SAW RIGHT PAW PRINTS NEAR THE DOOR"
Round 1,953 to the nearest thousand = 2000 (W) · Round 5,230 to the nearest thousand = 5000 (D) · Round 228 to the nearest hundred = 200 (E) · Round 62 to the nearest ten = 60 (P) · Round 363 to the nearest hundred = 400 (S) · Round 88 to the nearest ten = 90 (G) · Round 700 to the nearest hundred = 700 (T) · Round 5,662 to the nearest thousand = 6000 (N) · Round 3,569 to the nearest thousand = 4000 (R) · Round 19 to the nearest ten = 20 (O) · Round 26 to the nearest ten = 30 (I) · Round 339 to the nearest hundred = 300 (H) · Round 3,298 to the nearest thousand = 3000 (A)
Clue 3 (Addition): "VILLAIN WAS TRAPPED IN A CARDBOARD BOX"
196 + 217 = 413 (V) · 532 + 399 = 931 (P) · 460 + 393 = 853 (T) · 163 + 99 = 262 (L) · 116 + 230 = 346 (S) · 441 + 288 = 729 (N) · 355 + 610 = 965 (W) · 163 + 319 = 482 (D) · 139 + 216 = 355 (O) · 532 + 381 = 913 (R) · 332 + 241 = 573 (B) · 338 + 231 = 569 (X) · 258 + 171 = 429 (A) · 386 + 585 = 971 (I) · 217 + 163 = 380 (E) · 386 + 217 = 603 (C)
Clue 4 (Subtraction): "DETECTIVE FOUND CALICO FUR AT SCENE"
998 - 294 = 704 (D) · 526 - 86 = 440 (R) · 748 - 345 = 403 (E) · 971 - 398 = 573 (C) · 1062 - 168 = 894 (F) · 365 - 247 = 118 (O) · 334 - 76 = 258 (I) · 1140 - 267 = 873 (T) · 526 - 201 = 325 (V) · 859 - 284 = 575 (U) · 452 - 48 = 404 (N) · 758 - 276 = 482 (L) · 780 - 50 = 730 (A) · 861 - 315 = 546 (S)
Clue 5 (Division facts (1-12)): surviving statement (box 5) → Luna
24 ÷ 4 = 6 · 84 ÷ 7 = 12 · 72 ÷ 9 = 8 · 10 ÷ 1 = 10 · 3 ÷ 1 = 3 · 44 ÷ 4 = 11 · 40 ÷ 10 = 4 · 10 ÷ 10 = 1 · 9 ÷ 1 = 9 · 77 ÷ 11 = 7 · 10 ÷ 5 = 2

About this mystery

Grade level: Grade 3 math
Math topics: Multiplication, Rounding, Addition, Subtraction, Division
Reading level: grades 3-4
Theme: The Great Purrville Diamond Caper — set in Whisker Academy Museum
Format: Interactive online & printable worksheet with answer key
Solution: One unique, verified culprit among 21 suspects

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