Grade 4Reading: grades 3-4MultiplicationRoundingAdditionSubtractionDivision

The Mystery of the Missing Cloud Compass

Someone snuck onto the airship flagship and took the golden cloud compass! The Head Navigator needs your help to figure out which sky bandit pulled off this sneaky heist before the ship sails.

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 Gear	Companion Animal	Goggle Stance	Cap Color	Distraction
Cloudy Chris	Rope Launcher	Falcon	Goggles On Head	Blue Cap	Shiny Coins
Glide Gavin	Rope Launcher	Squirrel	Goggles On Neck	Green Cap	Fresh Fruit
Gale Greta	Glider Wings	Falcon	Goggles On Neck	Green Cap	Shiny Coins
Skye Spencer	Jet Boots	Parrot	Goggles On Neck	Green Cap	Whistle Sound
Gusty Gabe	Jet Boots	Lizard	Goggles On Head	Blue Cap	Shiny Coins
Avian Ava	Jet Boots	Monkey	Goggles On Neck	Green Cap	Shiny Coins
Orbit Maya	Grappling Hook	Parrot	Goggles On Head	Red Cap	Shiny Coins
Pilot Penny	Glider Wings	Lizard	Goggles On Head	Red Cap	Whistle Sound
Aero Andy	Rope Launcher	Squirrel	Goggles On Head	Red Cap	Shiny Coins
Barnaby B	Grappling Hook	Lizard	Goggles On Neck	Green Cap	Shiny Coins
Skyline Sally	Grappling Hook	Parrot	Goggles On Neck	Green Cap	Fresh Fruit
Pip Parker	Jet Boots	Lizard	Goggles On Head	Red Cap	Fresh Fruit
Ranger Rick	Compass Ring	Lizard	Goggles On Neck	Green Cap	Shiny Coins
Stratus Leo	Jet Boots	Parrot	Goggles On Neck	Blue Cap	Shiny Coins
Breeze Bella	Rope Launcher	Parrot	Goggles On Head	Green Cap	Fresh Fruit
Captain Cora	Glider Wings	Lizard	Goggles On Head	Green Cap	Shiny Coins
Hover Hannah	Grappling Hook	Falcon	Goggles On Head	Blue Cap	Whistle Sound
Drafty Dan	Glider Wings	Parrot	Goggles On Head	Blue Cap	Whistle Sound
Radar Ruby	Glider Wings	Monkey	Goggles On Neck	Green Cap	Shiny Coins
Cirrus Chloe	Glider Wings	Lizard	Goggles On Neck	Blue Cap	Whistle Sound
Scout Sam	Grappling Hook	Squirrel	Goggles On Head	Red Cap	Whistle Sound

Clue 1

Multiplication facts (1-12)

The navigators are packing crate boxes of sky maps into equal rows.

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

108

3 × 3 =T

11 × 8 =H

6 × 7 =E

1 × 7 =V

6 × 5 =O

8 × 10 =S

2 × 11 =I

3 × 6 =F

12 × 9 =N

5 × 9 =L

9 × 3 =D

4 × 10 =C

9 × 9 =A

0/13 letters found

Clue 2

Rounding

The altimeter screen shows a rough height rounded to the nearest hundred.

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

230

9000

700

1100

170

7000

170

4300

700

1100

7000

9000

2900

700

110

900

Round 52 to the nearest tenA

Round 106 to the nearest tenC

Round 232 to the nearest tenI

Round 914 to the nearest hundredK

Round 168 to the nearest tenG

Round 23 to the nearest tenW

Round 2,880 to the nearest hundredH

Round 28 to the nearest tenN

Round 4,262 to the nearest hundredL

Round 7,039 to the nearest thousandO

Round 678 to the nearest hundredE

Round 8,754 to the nearest thousandT

Round 1,069 to the nearest hundredS

0/13 letters found

Clue 3

Addition

The crew tallied up all the extra helium canisters found on the dock.

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

7404

5188

5693

4423

9204

7775

4977

7404

5245

9345

7775

8570

5693

5245

4423

5188

4050

2553

5033

9204

7775

4050

2553

4423

7404

7775

5693

4423

9204

8458

8570

5693

3153 + 4251 =T

2352 + 2681 =Y

3233 + 2460 =E

3033 + 2155 =H

2203 + 1847 =I

3785 + 3990 =O

3189 + 1788 =U

2100 + 3145 =D

5633 + 2937 =P

3682 + 5522 =C

6358 + 2987 =R

1107 + 1446 =N

3982 + 4476 =A

2133 + 2290 =S

0/14 letters found

Clue 4

Subtraction

The station guard checked how many rope bundles were left after the getaway.

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

2658

1257

7296

6133

5554

1408

6018

7589

5449

5541

7296

1257

6118

4629

7296

1257

7296

5735

7296

7589

8187

1408

8187

7678

7296

6118

5554

7296

6133

7296

7425 - 4767 =G

5957 - 1328 =W

7825 - 1707 =S

8629 - 2611 =P

9287 - 3552 =L

2945 - 1537 =A

10041 - 4500 =B

8490 - 1194 =E

9246 - 3113 =N

8969 - 1380 =F

10202 - 4753 =I

10061 - 2383 =H

3875 - 2618 =R

8625 - 438 =T

6836 - 1282 =C

0/15 letters found

Clue 5

Division facts (1-12) — the last clue

The scouts split the rescue snack bars equally among their search teams.

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

10 ÷ 10 = ?

2 ÷ 1 = ?

45 ÷ 5 = ?

54 ÷ 9 = ?

12 ÷ 3 = ?

36 ÷ 12 = ?

144 ÷ 12 = ?

48 ÷ 6 = ?

49 ÷ 7 = ?

132 ÷ 12 = ?

40 ÷ 8 = ?

Step 2 — cross out the sentence with each answer

1.The villain soared over with glider wings, then escaped with a monkey.

2.The villain guided the path with a compass ring, then escaped with a lizard.

3.The villain snared the prize with a rope launcher, then escaped with a monkey.

4.The villain boosted away on jet boots, then escaped with a falcon.

5.The villain boosted away on jet boots, then escaped with a squirrel.

6.The villain boosted away on jet boots, then escaped with a parrot.

7.The villain snared the prize with a rope launcher, then escaped with a parrot.

8.The villain boosted away on jet boots, then escaped with a lizard.

9.The villain boosted away on jet boots, then escaped with a monkey.

10.The villain swung across with a grappling hook, then escaped with a lizard.

11.The villain snared the prize with a rope launcher, then escaped with a falcon.

12.The villain soared over with glider wings, then escaped with a lizard.

Solve it

Name the culprit

Choose the one suspect left standing.

Answer Key — The Mystery of the Missing Cloud Compass

Culprit: Barnaby B (Grappling Hook · Lizard · Goggles On Neck · Green Cap · Shiny Coins)

Clue 1 (Multiplication facts (1-12)): "THE VILLAIN DOES NOT HAVE A FALCON"
3 × 3 = 9 (T) · 11 × 8 = 88 (H) · 6 × 7 = 42 (E) · 1 × 7 = 7 (V) · 6 × 5 = 30 (O) · 8 × 10 = 80 (S) · 2 × 11 = 22 (I) · 3 × 6 = 18 (F) · 12 × 9 = 108 (N) · 5 × 9 = 45 (L) · 9 × 3 = 27 (D) · 4 × 10 = 40 (C) · 9 × 9 = 81 (A)
Clue 2 (Rounding): "A WITNESS SAW GOGGLES ON THE NECK"
Round 52 to the nearest ten = 50 (A) · Round 106 to the nearest ten = 110 (C) · Round 232 to the nearest ten = 230 (I) · Round 914 to the nearest hundred = 900 (K) · Round 168 to the nearest ten = 170 (G) · Round 23 to the nearest ten = 20 (W) · Round 2,880 to the nearest hundred = 2900 (H) · Round 28 to the nearest ten = 30 (N) · Round 4,262 to the nearest hundred = 4300 (L) · Round 7,039 to the nearest thousand = 7000 (O) · Round 678 to the nearest hundred = 700 (E) · Round 8,754 to the nearest thousand = 9000 (T) · Round 1,069 to the nearest hundred = 1100 (S)
Clue 3 (Addition): "THE SCOUT DROPPED SHINY COINS TO ESCAPE"
3153 + 4251 = 7404 (T) · 2352 + 2681 = 5033 (Y) · 3233 + 2460 = 5693 (E) · 3033 + 2155 = 5188 (H) · 2203 + 1847 = 4050 (I) · 3785 + 3990 = 7775 (O) · 3189 + 1788 = 4977 (U) · 2100 + 3145 = 5245 (D) · 5633 + 2937 = 8570 (P) · 3682 + 5522 = 9204 (C) · 6358 + 2987 = 9345 (R) · 1107 + 1446 = 2553 (N) · 3982 + 4476 = 8458 (A) · 2133 + 2290 = 4423 (S)
Clue 4 (Subtraction): "GREEN CAP FIBERS WERE LEFT AT THE SCENE"
7425 - 4767 = 2658 (G) · 5957 - 1328 = 4629 (W) · 7825 - 1707 = 6118 (S) · 8629 - 2611 = 6018 (P) · 9287 - 3552 = 5735 (L) · 2945 - 1537 = 1408 (A) · 10041 - 4500 = 5541 (B) · 8490 - 1194 = 7296 (E) · 9246 - 3113 = 6133 (N) · 8969 - 1380 = 7589 (F) · 10202 - 4753 = 5449 (I) · 10061 - 2383 = 7678 (H) · 3875 - 2618 = 1257 (R) · 8625 - 438 = 8187 (T) · 6836 - 1282 = 5554 (C)
Clue 5 (Division facts (1-12)): surviving statement (box 10) → Barnaby B
10 ÷ 10 = 1 · 2 ÷ 1 = 2 · 45 ÷ 5 = 9 · 54 ÷ 9 = 6 · 12 ÷ 3 = 4 · 36 ÷ 12 = 3 · 144 ÷ 12 = 12 · 48 ÷ 6 = 8 · 49 ÷ 7 = 7 · 132 ÷ 12 = 11 · 40 ÷ 8 = 5

About this mystery

Grade level: Grade 4 math
Math topics: Multiplication, Rounding, Addition, Subtraction, Division
Reading level: grades 3-4
Theme: The Mystery of the Missing Cloud Compass — set in The Floating Docks of Skyland
Format: Interactive online & printable worksheet with answer key
Solution: One unique, verified culprit among 21 suspects

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