Grade 4Reading: grades 3-4Place valueAdditionSubtractionMultiplicationMissing addends

The Cloud Kingdom Caper

The legendary Golden Compass has been snatched from the Chief Mapmaker's high-flying workshop! We must gather clues across the floating islands to track down the Sky Bandit.

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	Airship Pilot Gear	Secret Gadget	Eye Gear	Hair Color	Fear
Kai	Wind Sail	Net Launcher	Brass Goggles	Curly Green	Shiny Mirrors
Milo	Storm Engine	Smoke Bomb	Tinted Visor	Curly Green	Wild Flowers
Sully	Grapple Hook	Net Launcher	Brass Goggles	Curly Green	Shiny Mirrors
Luna	Wind Sail	Flash Light	Brass Goggles	Curly Green	Shiny Mirrors
Finn	Storm Engine	Zip Line	Brass Goggles	Curly Green	Wild Flowers
Jax	Storm Engine	Flash Light	Brass Goggles	Curly Green	Shiny Mirrors
Otis	Cloud Glider	Magma Boots	Brass Goggles	Curly Green	Wild Flowers
Nora	Storm Engine	Flash Light	Brass Goggles	Curly Green	Wild Flowers
Marco	Wind Sail	Smoke Bomb	Brass Goggles	Spiky Blue	Wild Flowers
Leo	Turbo Prop	Flash Light	Tinted Visor	Spunky Red	Squeaky Toys
Maya	Cloud Glider	Zip Line	Brass Goggles	Curly Green	Shiny Mirrors
Drake	Wind Sail	Flash Light	Brass Goggles	Curly Green	Wild Flowers
Skye	Cloud Glider	Zip Line	Tinted Visor	Curly Green	Shiny Mirrors
Dash	Turbo Prop	Magma Boots	Tinted Visor	Spunky Red	Shiny Mirrors
Indiana	Storm Engine	Smoke Bomb	Tinted Visor	Curly Green	Shiny Mirrors
Ezra	Grapple Hook	Net Launcher	Brass Goggles	Curly Green	Squeaky Toys
Hazel	Storm Engine	Net Launcher	Brass Goggles	Curly Green	Wild Flowers
Clara	Wind Sail	Magma Boots	Tinted Visor	Spiky Blue	Wild Flowers
Lara	Cloud Glider	Net Launcher	Tinted Visor	Spunky Red	Wild Flowers
Amelia	Grapple Hook	Net Launcher	Tinted Visor	Spunky Red	Squeaky Toys
Barby	Cloud Glider	Net Launcher	Brass Goggles	Spunky Red	Shiny Mirrors

Clue 1

Place value

To track the airship, we must look at the digital coordinate dial. We need to find the value of the digit in the tens place.

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

900

400

700

800

900

5000

4000

3000

6000

4000

3000

300

800

900

What is the value of the 9 in 953?T

What is the value of the 3 in 5,037?I

What is the value of the 6 in 26,981?G

What is the value of the 3 in 43,077?A

What is the value of the 3 in 357?B

What is the value of the 8 in 839?O

What is the value of the 9 in 6,093?H

What is the value of the 8 in 4,789?E

What is the value of the 1 in 2,518?N

What is the value of the 7 in 760?D

What is the value of the 5 in 5,738?U

What is the value of the 4 in 5,499?F

What is the value of the 4 in 34,979?M

What is the value of the 5 in 7,156?S

0/14 letters found

Clue 2

Addition

We found a pile of dropped map scrolls in the forest. Let us add them all up to see how many the thief took.

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

8922

2228

9092

7771

7382

8342

8761

7382

3546

9182

9092

8761

6509

7423

9184

6509

8761

7423

6492

5605

6492

8342

9092

7423

3984 + 4938 =T

3753 + 4589 =L

5908 + 2853 =A

2161 + 1385 =N

5091 + 2680 =V

5935 + 3249 =B

4441 + 4651 =E

3627 + 2865 =G

805 + 1423 =H

3754 + 5428 =W

3119 + 4263 =I

2342 + 4167 =R

1716 + 3889 =O

4451 + 2972 =S

0/14 letters found

Clue 3

Subtraction

The bandit's fuel tank is leaking. If we subtract the spilled fuel from the total, we will know how far they can fly.

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

7050

2041

6064

3948

3371

7802

3055

7206

5744

3693

7802

2041

6802

5829

2041

5744

3693

6064

3948

5210

11948 - 4898 =A

6918 - 854 =E

7703 - 497 =T

4932 - 984 =R

10025 - 4815 =S

8070 - 1268 =D

10270 - 2468 =I

6440 - 4399 =L

5327 - 2272 =C

4854 - 1483 =G

8416 - 2587 =F

4295 - 602 =W

9507 - 3763 =O

0/13 letters found

Clue 4

Multiplication facts (1-12)

The thief left footprints in even rows across the sandy cloud. Let us multiply the rows by the columns to count them.

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

100

108

144

7 × 1 =L

6 × 11 =E

10 × 3 =F

7 × 11 =H

10 × 10 =U

12 × 9 =A

2 × 5 =C

2 × 11 =G

8 × 10 =N

5 × 11 =Y

12 × 12 =I

7 × 10 =T

8 × 11 =R

0/13 letters found

Clue 5

Missing addends — the last clue

The cargo scale needs to balance. We know the total weight, so we must find the missing weight of the stolen compass.

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

40 + ___ = 50

14 + ___ = 25

3 + ___ = 7

39 + ___ = 47

5 + ___ = 12

13 + ___ = 22

22 + ___ = 24

40 + ___ = 43

26 + ___ = 38

9 + ___ = 10

30 + ___ = 35

Step 2 — cross out the sentence with each answer

1.The villain blasted away with a Storm Engine, then dropped a Smoke Bomb to hide.

2.The villain sailed the breeze on a Wind Sail, then fired a Net Launcher to escape.

3.The villain sailed the breeze on a Wind Sail, then dropped a Smoke Bomb to hide.

4.The villain blasted away with a Storm Engine, then fired a Net Launcher to escape.

5.The villain swung through the air with a Grapple Hook, then fired a Net Launcher to escape.

6.The villain blasted away with a Storm Engine, then shined a bright Flash Light.

7.The villain zoomed off on a Cloud Glider, then stomped down using Magma Boots.

8.The villain sailed the breeze on a Wind Sail, then slid down a Zip Line.

9.The villain swung through the air with a Grapple Hook, then shined a bright Flash Light.

10.The villain sailed the breeze on a Wind Sail, then shined a bright Flash Light.

11.The villain blasted away with a Storm Engine, then slid down a Zip Line.

12.The villain sped away using a Turbo Prop, then stomped down using Magma Boots.

Solve it

Name the culprit

Choose the one suspect left standing.

Answer Key — The Cloud Kingdom Caper

Culprit: Nora (Storm Engine · Flash Light · Brass Goggles · Curly Green · Wild Flowers)

Clue 1 (Place value): "THE THIEF DOES NOT USE MAGMA BOOTS"
What is the value of the 9 in 953? = 900 (T) · What is the value of the 3 in 5,037? = 30 (I) · What is the value of the 6 in 26,981? = 6000 (G) · What is the value of the 3 in 43,077? = 3000 (A) · What is the value of the 3 in 357? = 300 (B) · What is the value of the 8 in 839? = 800 (O) · What is the value of the 9 in 6,093? = 90 (H) · What is the value of the 8 in 4,789? = 80 (E) · What is the value of the 1 in 2,518? = 10 (N) · What is the value of the 7 in 760? = 700 (D) · What is the value of the 5 in 5,738? = 5000 (U) · What is the value of the 4 in 5,499? = 400 (F) · What is the value of the 4 in 34,979? = 4000 (M) · What is the value of the 5 in 7,156? = 50 (S)
Clue 2 (Addition): "THE VILLAIN WEARS BRASS GOGGLES"
3984 + 4938 = 8922 (T) · 3753 + 4589 = 8342 (L) · 5908 + 2853 = 8761 (A) · 2161 + 1385 = 3546 (N) · 5091 + 2680 = 7771 (V) · 5935 + 3249 = 9184 (B) · 4441 + 4651 = 9092 (E) · 3627 + 2865 = 6492 (G) · 805 + 1423 = 2228 (H) · 3754 + 5428 = 9182 (W) · 3119 + 4263 = 7382 (I) · 2342 + 4167 = 6509 (R) · 1716 + 3889 = 5605 (O) · 4451 + 2972 = 7423 (S)
Clue 3 (Subtraction): "ALLERGIC TO WILD FLOWERS"
11948 - 4898 = 7050 (A) · 6918 - 854 = 6064 (E) · 7703 - 497 = 7206 (T) · 4932 - 984 = 3948 (R) · 10025 - 4815 = 5210 (S) · 8070 - 1268 = 6802 (D) · 10270 - 2468 = 7802 (I) · 6440 - 4399 = 2041 (L) · 5327 - 2272 = 3055 (C) · 4854 - 1483 = 3371 (G) · 8416 - 2587 = 5829 (F) · 4295 - 602 = 3693 (W) · 9507 - 3763 = 5744 (O)
Clue 4 (Multiplication facts (1-12)): "LEFT CURLY GREEN HAIR"
7 × 1 = 7 (L) · 6 × 11 = 66 (E) · 10 × 3 = 30 (F) · 7 × 11 = 77 (H) · 10 × 10 = 100 (U) · 12 × 9 = 108 (A) · 2 × 5 = 10 (C) · 2 × 11 = 22 (G) · 8 × 10 = 80 (N) · 5 × 11 = 55 (Y) · 12 × 12 = 144 (I) · 7 × 10 = 70 (T) · 8 × 11 = 88 (R)
Clue 5 (Missing addends): surviving statement (box 6) → Nora
40 + ___ = 50 = 10 · 14 + ___ = 25 = 11 · 3 + ___ = 7 = 4 · 39 + ___ = 47 = 8 · 5 + ___ = 12 = 7 · 13 + ___ = 22 = 9 · 22 + ___ = 24 = 2 · 40 + ___ = 43 = 3 · 26 + ___ = 38 = 12 · 9 + ___ = 10 = 1 · 30 + ___ = 35 = 5

About this mystery

Grade level: Grade 4 math
Math topics: Place value, Addition, Subtraction, Multiplication, Missing addends
Reading level: grades 3-4
Theme: The Cloud Kingdom Caper — set in The Floating Cloud Archipelago
Format: Interactive online & printable worksheet with answer key
Solution: One unique, verified culprit among 21 suspects

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