Grade 4Reading: grades 3-4MultiplicationRoundingAdditionSubtractionDivision

Mystery of the Cloud Castle Sky Pirate

Someone snuck into Cloud Castle Academy during the annual sky race and locked Headmaster Nimbus inside the trophy vault. The Sky Patrol squad needs your detective skills to decode the clues and catch the sneaky sky pirate.

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	Sky Gear	Glider Type	Steering Hand	Scarf Color	Distraction
Cadet Iris	Jet Boots	Feather Parachute	Left Handed	Sun Gold	Loud Whistles
Navigator Luke	Jet Boots	Twin Rotors	Left Handed	Bright Red	Fresh Pie
Cadet Owen	Smoke Grenade	Bat Kite	Right Handed	Deep Blue	Shiny Coins
Cadet Eli	Jet Boots	Feather Parachute	Left Handed	Bright Red	Fresh Pie
Pilot Max	Grappling Hook	Twin Rotors	Left Handed	Bright Red	Shiny Coins
Sky Captain Ben	Grappling Hook	Falcon Wings	Right Handed	Bright Red	Shiny Coins
Navigator Zoe	Smoke Grenade	Solar Sail	Left Handed	Bright Red	Shiny Coins
Navigator Hazel	Smoke Grenade	Bat Kite	Right Handed	Bright Red	Shiny Coins
Cadet Maya	Smoke Grenade	Bat Kite	Left Handed	Bright Red	Fresh Pie
Cadet Jade	Grappling Hook	Bat Kite	Left Handed	Bright Red	Shiny Coins
Cadet Leo	Wind Cannon	Solar Sail	Left Handed	Bright Red	Fresh Pie
Captain Rex	Wind Cannon	Feather Parachute	Right Handed	Bright Red	Fresh Pie
Cadet Ivy	Wind Cannon	Twin Rotors	Left Handed	Sun Gold	Loud Whistles
Pilot Cole	Jet Boots	Falcon Wings	Right Handed	Deep Blue	Loud Whistles
Pilot Sam	Jet Boots	Solar Sail	Left Handed	Bright Red	Fresh Pie
Pilot Ella	Grappling Hook	Bat Kite	Left Handed	Bright Red	Fresh Pie
Cadet Toby	Wind Cannon	Solar Sail	Left Handed	Bright Red	Loud Whistles
Captain Nora	Turbo Propeller	Bat Kite	Right Handed	Bright Red	Fresh Pie
Navigator Mia	Wind Cannon	Solar Sail	Left Handed	Sun Gold	Fresh Pie
Captain Dax	Grappling Hook	Twin Rotors	Left Handed	Deep Blue	Fresh Pie
Navigator Ava	Wind Cannon	Feather Parachute	Left Handed	Sun Gold	Loud Whistles

Clue 1

Multiplication facts (1-12)

Pilot Sam checks the cloud racer hangar where crates of gear are stacked in 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.

7 × 9 =T

6 × 4 =R

8 × 6 =N

5 × 7 =P

2 × 1 =E

4 × 5 =I

2 × 8 =U

9 × 9 =Y

5 × 3 =D

12 × 8 =O

2 × 4 =K

6 × 3 =S

3 × 7 =L

12 × 7 =A

1 × 5 =H

0/15 letters found

Clue 2

Rounding

Cadet Maya looks at the sky radar screen which rounds all distance numbers 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.

290

1700

430

1100

900

290

430

290

7000

430

2300

200

170

290

1700

2300

7000

4300

500

290

1700

370

200

2900

Round 293 to the nearest tenT

Round 174 to the nearest tenG

Round 1,728 to the nearest hundredH

Round 72 to the nearest tenU

Round 1,077 to the nearest hundredP

Round 432 to the nearest tenS

Round 197 to the nearest hundredN

Round 539 to the nearest hundredF

Round 2,880 to the nearest hundredD

Round 4,292 to the nearest hundredL

Round 53 to the nearest tenE

Round 370 to the nearest tenA

Round 2,302 to the nearest hundredI

Round 7,311 to the nearest thousandR

Round 898 to the nearest hundredC

0/15 letters found

Clue 3

Addition

Navigator Zoe totals up all the found storm crystals in the sky lockbox.

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

7272

2580

4980

8648

5153

8648

3321

4980

2155

7272

2155

6755

2460

9885

4980

7272

3327

8410

2155

8643

4980

7639

9383

8410

7272

2580

2099

3327

4980

8648

2580

3321

8410

4980

4860 + 2412 =T

4127 + 5256 =W

5153 + 2486 =D

1523 + 1057 =H

2315 + 2838 =U

3879 + 4531 =I

1386 + 713 =F

1689 + 3291 =E

1214 + 2113 =R

3662 + 4981 =K

1353 + 802 =C

6628 + 3257 =B

837 + 1623 =N

3675 + 4973 =S

1888 + 1433 =P

3368 + 3387 =A

0/16 letters found

Clue 4

Subtraction

Captain Dax calculates how many wind compasses remain after the pirate raid.

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

1610

3078

3587

7819

6003

6613

5502

3587

8279

6837

6648

1734

1610

3587

7950

4762

1610

6648

6837

3587

2057

2871

8279

6837

3078

3659

5502

6613

8279

6648

1610

7950

8279

2570 - 960 =A

6187 - 3109 =B

12134 - 3855 =E

8424 - 4765 =Y

10938 - 4325 =H

6475 - 4741 =C

9702 - 1752 =F

9168 - 3165 =G

5028 - 1441 =R

9577 - 4815 =W

6323 - 3452 =P

12704 - 4885 =I

10452 - 3804 =S

4106 - 2049 =O

10987 - 4150 =D

8599 - 3097 =T

0/16 letters found

Clue 5

Division facts (1-12) — the last clue

Cadet Kai splits the cloud snacks evenly among the patrol squad members.

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

110 ÷ 10 = ?

60 ÷ 5 = ?

16 ÷ 2 = ?

20 ÷ 10 = ?

12 ÷ 12 = ?

24 ÷ 6 = ?

30 ÷ 5 = ?

63 ÷ 7 = ?

30 ÷ 10 = ?

90 ÷ 9 = ?

42 ÷ 6 = ?

Step 2 — cross out the sentence with each answer

1.The villain blasted a wind cannon, then sailed on a solar sail.

2.The villain fired a grappling hook, then drifted on a feather parachute.

3.The villain blasted a wind cannon, then soared on falcon wings.

4.The villain spun a turbo propeller, then sailed on a solar sail.

5.The villain boosted with jet boots, then hovered on twin rotors.

6.The villain dropped a smoke grenade, then sailed on a solar sail.

7.The villain spun a turbo propeller, then soared on falcon wings.

8.The villain dropped a smoke grenade, then glided on a bat kite.

9.The villain boosted with jet boots, then glided on a bat kite.

10.The villain blasted a wind cannon, then glided on a bat kite.

11.The villain fired a grappling hook, then glided on a bat kite.

12.The villain boosted with jet boots, then drifted on a feather parachute.

Solve it

Name the culprit

Choose the one suspect left standing.

Answer Key — Mystery of the Cloud Castle Sky Pirate

Culprit: Navigator Luke (Jet Boots · Twin Rotors · Left Handed · Bright Red · Fresh Pie)

Clue 1 (Multiplication facts (1-12)): "THE SNEAKY PIRATE DOES NOT USE A SOLAR SAIL"
7 × 9 = 63 (T) · 6 × 4 = 24 (R) · 8 × 6 = 48 (N) · 5 × 7 = 35 (P) · 2 × 1 = 2 (E) · 4 × 5 = 20 (I) · 2 × 8 = 16 (U) · 9 × 9 = 81 (Y) · 5 × 3 = 15 (D) · 12 × 8 = 96 (O) · 2 × 4 = 8 (K) · 6 × 3 = 18 (S) · 3 × 7 = 21 (L) · 12 × 7 = 84 (A) · 1 × 5 = 5 (H)
Clue 2 (Rounding): "THE SUSPECT STEERS USING THEIR LEFT HAND"
Round 293 to the nearest ten = 290 (T) · Round 174 to the nearest ten = 170 (G) · Round 1,728 to the nearest hundred = 1700 (H) · Round 72 to the nearest ten = 70 (U) · Round 1,077 to the nearest hundred = 1100 (P) · Round 432 to the nearest ten = 430 (S) · Round 197 to the nearest hundred = 200 (N) · Round 539 to the nearest hundred = 500 (F) · Round 2,880 to the nearest hundred = 2900 (D) · Round 4,292 to the nearest hundred = 4300 (L) · Round 53 to the nearest ten = 50 (E) · Round 370 to the nearest ten = 370 (A) · Round 2,302 to the nearest hundred = 2300 (I) · Round 7,311 to the nearest thousand = 7000 (R) · Round 898 to the nearest hundred = 900 (C)
Clue 3 (Addition): "THE SUSPECT CAN BE TRICKED WITH FRESH PIE"
4860 + 2412 = 7272 (T) · 4127 + 5256 = 9383 (W) · 5153 + 2486 = 7639 (D) · 1523 + 1057 = 2580 (H) · 2315 + 2838 = 5153 (U) · 3879 + 4531 = 8410 (I) · 1386 + 713 = 2099 (F) · 1689 + 3291 = 4980 (E) · 1214 + 2113 = 3327 (R) · 3662 + 4981 = 8643 (K) · 1353 + 802 = 2155 (C) · 6628 + 3257 = 9885 (B) · 837 + 1623 = 2460 (N) · 3675 + 4973 = 8648 (S) · 1888 + 1433 = 3321 (P) · 3368 + 3387 = 6755 (A)
Clue 4 (Subtraction): "A BRIGHT RED SCARF WAS DROPPED BY THE SAFE"
2570 - 960 = 1610 (A) · 6187 - 3109 = 3078 (B) · 12134 - 3855 = 8279 (E) · 8424 - 4765 = 3659 (Y) · 10938 - 4325 = 6613 (H) · 6475 - 4741 = 1734 (C) · 9702 - 1752 = 7950 (F) · 9168 - 3165 = 6003 (G) · 5028 - 1441 = 3587 (R) · 9577 - 4815 = 4762 (W) · 6323 - 3452 = 2871 (P) · 12704 - 4885 = 7819 (I) · 10452 - 3804 = 6648 (S) · 4106 - 2049 = 2057 (O) · 10987 - 4150 = 6837 (D) · 8599 - 3097 = 5502 (T)
Clue 5 (Division facts (1-12)): surviving statement (box 5) → Navigator Luke
110 ÷ 10 = 11 · 60 ÷ 5 = 12 · 16 ÷ 2 = 8 · 20 ÷ 10 = 2 · 12 ÷ 12 = 1 · 24 ÷ 6 = 4 · 30 ÷ 5 = 6 · 63 ÷ 7 = 9 · 30 ÷ 10 = 3 · 90 ÷ 9 = 10 · 42 ÷ 6 = 7

About this mystery

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

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