Grade 3Reading: grades 3-4RoundingAdditionSubtractionMultiplicationDivision
Mystery of the Cloud Island Map
Someone swiped the Golden Compass from the Head Mapmaker! Solve the math clues to uncover which rogue sky pirate pulled off the theft.
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 Gear | Sky Gadget | Glider Stance | Bandana Color | Weakness |
|---|---|---|---|---|---|
| Quinn | Wind Cannon | Brass Telescope | Left Glider Stance | Crimson Bandana | Shiny Objects |
| Leo | Compass Hook | Cloud Whistle | Right Glider Stance | Crimson Bandana | Shiny Objects |
| Yareli | Turbo Jetpack | Brass Goggles | Left Glider Stance | Sapphire Bandana | Strong Breezes |
| Hank | Compass Hook | Feather Glider | Right Glider Stance | Emerald Bandana | Loud Whistles |
| Finn | Rope Launcher | Brass Goggles | Left Glider Stance | Emerald Bandana | Strong Breezes |
| Ruby | Compass Hook | Golden Spy Glass | Left Glider Stance | Crimson Bandana | Strong Breezes |
| Sam | Turbo Jetpack | Brass Goggles | Right Glider Stance | Emerald Bandana | Strong Breezes |
| Olivia | Compass Hook | Brass Telescope | Right Glider Stance | Emerald Bandana | Strong Breezes |
| Grace | Smoke Bomb | Feather Glider | Left Glider Stance | Crimson Bandana | Strong Breezes |
| Ivy | Compass Hook | Brass Telescope | Right Glider Stance | Crimson Bandana | Strong Breezes |
| Pete | Wind Cannon | Brass Goggles | Left Glider Stance | Crimson Bandana | Strong Breezes |
| Jack | Rope Launcher | Golden Spy Glass | Left Glider Stance | Emerald Bandana | Shiny Objects |
| Trixie | Compass Hook | Feather Glider | Right Glider Stance | Sapphire Bandana | Loud Whistles |
| Kiki | Wind Cannon | Cloud Whistle | Left Glider Stance | Crimson Bandana | Strong Breezes |
| Xander | Compass Hook | Brass Telescope | Right Glider Stance | Emerald Bandana | Shiny Objects |
| Uma | Compass Hook | Brass Telescope | Left Glider Stance | Crimson Bandana | Strong Breezes |
| Wendy | Compass Hook | Feather Glider | Left Glider Stance | Crimson Bandana | Shiny Objects |
| Ned | Turbo Jetpack | Golden Spy Glass | Right Glider Stance | Crimson Bandana | Strong Breezes |
| Vance | Smoke Bomb | Brass Telescope | Right Glider Stance | Crimson Bandana | Loud Whistles |
| Maya | Compass Hook | Brass Telescope | Left Glider Stance | Crimson Bandana | Loud Whistles |
| Barnaby | Turbo Jetpack | Brass Telescope | Left Glider Stance | Crimson Bandana | Shiny Objects |
Clue 1
Rounding
The altimeter on the bridge screen only shows rounded numbers, so you estimate the height of the deck to decode a note.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
T
500
300
20
700
80
9000
9000
2000
80
900
800
4000
20
3000
900
4000
T
500
60
3000
20
2000
50
9000
4000
60
800
70
300
80
3000
T
500
9000
20
Round 477 to the nearest hundredT
Round 54 to the nearest tenC
Round 1,636 to the nearest thousandA
Round 9,257 to the nearest thousandL
Round 23 to the nearest tenE
Round 762 to the nearest hundredD
Round 682 to the nearest hundredV
Round 64 to the nearest tenU
Round 3,502 to the nearest thousandO
Round 66 to the nearest tenW
Round 904 to the nearest hundredN
Round 2,600 to the nearest thousandS
Round 296 to the nearest hundredH
Round 76 to the nearest tenI
0/14 letters found
Clue 2
Addition
You count up the total supply crates found near the vault to piece together the scene.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
T
532
846
987
257
968
257
312
987
954
T
532
257
T
532
948
464
428
257
698
464
895
987
971
T
532
867
895
698
428
987
887
257
T
532
948
464
954
987
162 + 370 =T
521 + 346 =G
350 + 537 =R
342 + 606 =A
518 + 450 =U
371 + 524 =L
170 + 87 =S
295 + 133 =D
529 + 442 =F
397 + 449 =H
555 + 399 =C
374 + 324 =I
155 + 309 =N
308 + 679 =E
111 + 201 =P
0/15 letters found
Clue 3
Subtraction
You calculate how many missing coins were taken from the chest to find the next lead.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
T
433
485
123
368
767
868
868
866
767
817
829
123
T
433
684
201
817
434
162
201
123
818
434
368
123
654
513
418
513
654
123
123
850
123
684
780 - 347 =T
713 - 228 =H
1121 - 304 =N
517 - 99 =Y
986 - 219 =I
570 - 136 =O
722 - 354 =V
1188 - 322 =A
1221 - 392 =G
836 - 182 =R
1045 - 227 =D
225 - 63 =C
447 - 324 =E
786 - 273 =B
957 - 107 =Z
976 - 292 =S
580 - 379 =K
920 - 52 =L
0/18 letters found
Clue 4
Multiplication facts (1-12)
You inspect equal rows of locker doors along the hallway to unlock a hidden secret.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
T
6
110
1
55
10
66
66
99
10
8
120
121
22
144
144
1
120
99
64
121
10
2
77
22
8
40
99
8
120
99
8
99
2 × 3 =T
1 × 1 =E
1 × 8 =N
5 × 8 =B
8 × 8 =C
11 × 11 =R
7 × 11 =S
2 × 1 =M
10 × 12 =D
1 × 10 =I
2 × 11 =O
11 × 9 =A
10 × 11 =H
5 × 11 =V
12 × 12 =P
11 × 6 =L
0/16 letters found
Clue 5
Division facts (1-12) — the last clue
You share out the remaining signal flares equally among the crew to reveal the final clue.
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
90 ÷ 10 = ?
11 ÷ 1 = ?
70 ÷ 7 = ?
20 ÷ 10 = ?
3 ÷ 3 = ?
9 ÷ 3 = ?
32 ÷ 4 = ?
5 ÷ 1 = ?
32 ÷ 8 = ?
42 ÷ 6 = ?
48 ÷ 8 = ?
Step 2 — cross out the sentence with each answer
1.The villain shoots the rope launcher, then checks the brass telescope.
2.The villain shoots the rope launcher, then polishes the golden spy glass.
3.The villain shoots the rope launcher, then adjusts the brass goggles.
4.The villain zooms off on a turbo jetpack, then checks the brass telescope.
5.The villain zooms off on a turbo jetpack, then glides away on a feather glider.
6.The villain zooms off on a turbo jetpack, then adjusts the brass goggles.
7.The villain zooms off on a turbo jetpack, then polishes the golden spy glass.
8.The villain fires the compass hook, then adjusts the brass goggles.
9.The villain fires the compass hook, then polishes the golden spy glass.
10.The villain blasts the wind cannon, then adjusts the brass goggles.
11.The villain fires the compass hook, then checks the brass telescope.
12.The villain drops a smoke bomb, then glides away on a feather glider.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — Mystery of the Cloud Island Map
Culprit: Grace (Smoke Bomb · Feather Glider · Left Glider Stance · Crimson Bandana · Strong Breezes)
- Clue 1 (Rounding): "THE VILLAIN DOES NOT USE A CLOUD WHISTLE"Round 477 to the nearest hundred = 500 (T) · Round 54 to the nearest ten = 50 (C) · Round 1,636 to the nearest thousand = 2000 (A) · Round 9,257 to the nearest thousand = 9000 (L) · Round 23 to the nearest ten = 20 (E) · Round 762 to the nearest hundred = 800 (D) · Round 682 to the nearest hundred = 700 (V) · Round 64 to the nearest ten = 60 (U) · Round 3,502 to the nearest thousand = 4000 (O) · Round 66 to the nearest ten = 70 (W) · Round 904 to the nearest hundred = 900 (N) · Round 2,600 to the nearest thousand = 3000 (S) · Round 296 to the nearest hundred = 300 (H) · Round 76 to the nearest ten = 80 (I)
- Clue 2 (Addition): "THE SUSPECT STANDS IN LEFT GLIDER STANCE"162 + 370 = 532 (T) · 521 + 346 = 867 (G) · 350 + 537 = 887 (R) · 342 + 606 = 948 (A) · 518 + 450 = 968 (U) · 371 + 524 = 895 (L) · 170 + 87 = 257 (S) · 295 + 133 = 428 (D) · 529 + 442 = 971 (F) · 397 + 449 = 846 (H) · 555 + 399 = 954 (C) · 374 + 324 = 698 (I) · 155 + 309 = 464 (N) · 308 + 679 = 987 (E) · 111 + 201 = 312 (P)
- Clue 3 (Subtraction): "THE VILLAIN GETS KNOCKED OVER BY BREEZES"780 - 347 = 433 (T) · 713 - 228 = 485 (H) · 1121 - 304 = 817 (N) · 517 - 99 = 418 (Y) · 986 - 219 = 767 (I) · 570 - 136 = 434 (O) · 722 - 354 = 368 (V) · 1188 - 322 = 866 (A) · 1221 - 392 = 829 (G) · 836 - 182 = 654 (R) · 1045 - 227 = 818 (D) · 225 - 63 = 162 (C) · 447 - 324 = 123 (E) · 786 - 273 = 513 (B) · 957 - 107 = 850 (Z) · 976 - 292 = 684 (S) · 580 - 379 = 201 (K) · 920 - 52 = 868 (L)
- Clue 4 (Multiplication facts (1-12)): "THE VILLAIN DROPPED A CRIMSON BANDANA"2 × 3 = 6 (T) · 1 × 1 = 1 (E) · 1 × 8 = 8 (N) · 5 × 8 = 40 (B) · 8 × 8 = 64 (C) · 11 × 11 = 121 (R) · 7 × 11 = 77 (S) · 2 × 1 = 2 (M) · 10 × 12 = 120 (D) · 1 × 10 = 10 (I) · 2 × 11 = 22 (O) · 11 × 9 = 99 (A) · 10 × 11 = 110 (H) · 5 × 11 = 55 (V) · 12 × 12 = 144 (P) · 11 × 6 = 66 (L)
- Clue 5 (Division facts (1-12)): surviving statement (box 12) → Grace90 ÷ 10 = 9 · 11 ÷ 1 = 11 · 70 ÷ 7 = 10 · 20 ÷ 10 = 2 · 3 ÷ 3 = 1 · 9 ÷ 3 = 3 · 32 ÷ 4 = 8 · 5 ÷ 1 = 5 · 32 ÷ 8 = 4 · 42 ÷ 6 = 7 · 48 ÷ 8 = 6
About this mystery
- Grade level
- Grade 3 math
- Math topics
- Rounding, Addition, Subtraction, Multiplication, Division
- Reading level
- grades 3-4
- Theme
- Mystery of the Cloud Island Map — set in Sky Pirate Academy aboard the Airship Zephyr
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects