Grade 4Reading: grades 5-6MultiplicationRoundingAdditionSubtractionDivision
The Sky Citadel Sabotage
A daring sky thief slipped into the Aerie Peak Airship Dock and stole the master navigation crystal! The Head Aeronaut needs your detective skills to decode emergency radio messages, analyze vault evidence, and track down the culprit.
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 | Primary Gear | Flight Pack | Dominant Hand | Goggle Strap | Vulnerability |
|---|---|---|---|---|---|
| Navigator Leo Frost | Flash Beacon | Turbo Prop | Left-Handed | Gold Straps | Loud Whistles |
| Scout Felix Vance | Smoke Bomb | Turbo Prop | Right-Handed | Silver Straps | Bright Lights |
| Officer Julian Hawk | Magnetic Boots | Feather Parachute | Right-Handed | Silver Straps | Bright Lights |
| Rigger Violet Palmer | Grapple Hook | Feather Parachute | Right-Handed | Silver Straps | Cold Gusts |
| Captain Silas Drake | Smoke Bomb | Feather Parachute | Left-Handed | Silver Straps | Cold Gusts |
| Engineer Maya Stone | Magnetic Boots | Feather Parachute | Left-Handed | Bronze Straps | Cold Gusts |
| Aeronaut Iris West | Smoke Bomb | Feather Parachute | Left-Handed | Bronze Straps | Loud Whistles |
| Aviator Nora Vale | Sonic Whistle | Feather Parachute | Left-Handed | Silver Straps | Bright Lights |
| Engineer Sadie Cloud | Grapple Hook | Jet Thruster | Right-Handed | Silver Straps | Cold Gusts |
| Scout Gemma Brooks | Grapple Hook | Jet Thruster | Left-Handed | Bronze Straps | Cold Gusts |
| Mechanic Rose Sterling | Smoke Bomb | Turbo Prop | Right-Handed | Silver Straps | Cold Gusts |
| Cadet Tessa Sky | Grapple Hook | Jet Thruster | Left-Handed | Bronze Straps | Loud Whistles |
| Mechanic Vance Cole | Flash Beacon | Solar Wings | Right-Handed | Gold Straps | Cold Gusts |
| Navigator Rowan Gale | Smoke Bomb | Wind Sail | Right-Handed | Gold Straps | Bright Lights |
| Pilot Jasper Reed | Flash Beacon | Feather Parachute | Left-Handed | Silver Straps | Loud Whistles |
| Commander Clara Finch | Sonic Whistle | Wind Sail | Right-Handed | Silver Straps | Cold Gusts |
| Cadet Toby Wren | Smoke Bomb | Wind Sail | Right-Handed | Silver Straps | Cold Gusts |
| Rigger Eli Mercer | Smoke Bomb | Jet Thruster | Left-Handed | Bronze Straps | Cold Gusts |
| Pilot Piper Paige | Sonic Whistle | Solar Wings | Right-Handed | Gold Straps | Loud Whistles |
| Captain Amelia Cross | Magnetic Boots | Wind Sail | Right-Handed | Silver Straps | Loud Whistles |
| Skyward Sam Hayes | Flash Beacon | Turbo Prop | Left-Handed | Bronze Straps | Loud Whistles |
Clue 1
Multiplication facts (1-12)
To unlock the first radio code, multiply the supply rows in the hangar grid.
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
88
8
81
5
121
36
36
32
121
80
60
10
81
120
80
10
T
88
54
120
81
32
20
81
T
88
T
88
8
108
54
120
T
88
81
108
8 × 11 =T
6 × 9 =U
12 × 3 =L
9 × 9 =E
5 × 1 =V
9 × 12 =R
10 × 12 =S
8 × 10 =N
8 × 4 =A
5 × 12 =D
1 × 8 =H
5 × 2 =O
5 × 4 =J
11 × 11 =I
0/14 letters found
Clue 2
Rounding
The altitude scanner rounds flight coordinates to the nearest thousand to reveal the next clue.
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
30
1700
290
200
700
200
430
290
1100
T
30
700
200
290
20
T
30
1700
290
7000
300
300
7000
2900
1700
T
30
1700
2000
50
20
2300
900
300
T
30
1700
290
1300
290
70
290
300
Round 33 to the nearest tenT
Round 7,255 to the nearest thousandI
Round 667 to the nearest hundredU
Round 1,568 to the nearest thousandA
Round 2,274 to the nearest hundredF
Round 1,680 to the nearest hundredH
Round 433 to the nearest tenP
Round 861 to the nearest hundredO
Round 2,898 to the nearest hundredG
Round 159 to the nearest hundredS
Round 1,085 to the nearest hundredC
Round 68 to the nearest tenV
Round 1,265 to the nearest hundredL
Round 256 to the nearest hundredR
Round 291 to the nearest tenE
Round 52 to the nearest tenN
Round 23 to the nearest tenD
0/17 letters found
Clue 3
Addition
Add up the total weight of the discarded escape gear to crack the third code.
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
2768
7995
5292
5045
5295
6609
7274
5292
5045
6692
8004
5292
7274
6468
7995
5292
7110
7995
6609
T
2768
6190
4094
9703
9368
8004
7274
7100
7019
6905
T
2768
6905
1717 + 1051 =T
3583 + 5785 =O
3644 + 3261 =S
2859 + 3750 =I
2871 + 4239 =N
4079 + 3925 =L
3034 + 3985 =U
4254 + 3741 =H
3989 + 3111 =G
2900 + 2392 =E
3366 + 6337 =C
3166 + 3526 =F
3438 + 3836 =D
3570 + 1725 =A
2524 + 2521 =R
2161 + 1933 =Y
3752 + 2438 =B
2970 + 3498 =W
0/18 letters found
Clue 4
Subtraction
Subtract the remaining fuel cells from the original dock inventory to uncover the fourth message.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
W
5373
8042
3108
3086
7486
7603
8290
7752
7677
5053
7793
8042
6282
7752
6733
6282
3161
5710
7752
7439
3161
7486
5322
7992
6733
3086
7603
6733
7992
8042
7992
3161
6733
7439
7992
7222 - 1849 =W
7589 - 4503 =O
9166 - 1489 =I
10279 - 3997 =R
3740 - 579 =A
12569 - 4577 =H
8049 - 2339 =P
8350 - 308 =E
5021 - 1913 =F
11550 - 3798 =S
8376 - 890 =U
11171 - 4438 =T
9902 - 4580 =G
8366 - 927 =C
9446 - 1843 =N
10694 - 2404 =D
5149 - 96 =L
11382 - 3589 =V
0/18 letters found
Clue 5
Division facts (1-12) — the last clue
Divide the remaining air canisters equally among the patrol squads to reveal the final message.
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
60 ÷ 5 = ?
8 ÷ 1 = ?
2 ÷ 2 = ?
80 ÷ 8 = ?
56 ÷ 8 = ?
22 ÷ 11 = ?
30 ÷ 6 = ?
72 ÷ 8 = ?
18 ÷ 6 = ?
54 ÷ 9 = ?
77 ÷ 7 = ?
Step 2 — cross out the sentence with each answer
1.The villain used a sonic whistle, then unfurled a wind sail.
2.The villain triggered a flash beacon, then ignited a jet thruster.
3.The villain dropped a smoke bomb, then floated with a feather parachute.
4.The villain fired a grapple hook, then floated with a feather parachute.
5.The villain used a sonic whistle, then ignited a jet thruster.
6.The villain walked with magnetic boots, then unfurled a wind sail.
7.The villain used a sonic whistle, then spun a turbo prop.
8.The villain dropped a smoke bomb, then unfurled a wind sail.
9.The villain triggered a flash beacon, then deployed solar wings.
10.The villain used a sonic whistle, then floated with a feather parachute.
11.The villain fired a grapple hook, then ignited a jet thruster.
12.The villain dropped a smoke bomb, then spun a turbo prop.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Sky Citadel Sabotage
Culprit: Rigger Violet Palmer (Grapple Hook · Feather Parachute · Right-Handed · Silver Straps · Cold Gusts)
- Clue 1 (Multiplication facts (1-12)): "THE VILLAIN DOES NOT USE A JET THRUSTER"8 × 11 = 88 (T) · 6 × 9 = 54 (U) · 12 × 3 = 36 (L) · 9 × 9 = 81 (E) · 5 × 1 = 5 (V) · 9 × 12 = 108 (R) · 10 × 12 = 120 (S) · 8 × 10 = 80 (N) · 8 × 4 = 32 (A) · 5 × 12 = 60 (D) · 1 × 8 = 8 (H) · 5 × 2 = 10 (O) · 5 × 4 = 20 (J) · 11 × 11 = 121 (I)
- Clue 2 (Rounding): "THE SUSPECT USED THEIR RIGHT HAND FOR THE LEVER"Round 33 to the nearest ten = 30 (T) · Round 7,255 to the nearest thousand = 7000 (I) · Round 667 to the nearest hundred = 700 (U) · Round 1,568 to the nearest thousand = 2000 (A) · Round 2,274 to the nearest hundred = 2300 (F) · Round 1,680 to the nearest hundred = 1700 (H) · Round 433 to the nearest ten = 430 (P) · Round 861 to the nearest hundred = 900 (O) · Round 2,898 to the nearest hundred = 2900 (G) · Round 159 to the nearest hundred = 200 (S) · Round 1,085 to the nearest hundred = 1100 (C) · Round 68 to the nearest ten = 70 (V) · Round 1,265 to the nearest hundred = 1300 (L) · Round 256 to the nearest hundred = 300 (R) · Round 291 to the nearest ten = 290 (E) · Round 52 to the nearest ten = 50 (N) · Round 23 to the nearest ten = 20 (D)
- Clue 3 (Addition): "THE RAIDER FLED WHEN HIT BY COLD GUSTS"1717 + 1051 = 2768 (T) · 3583 + 5785 = 9368 (O) · 3644 + 3261 = 6905 (S) · 2859 + 3750 = 6609 (I) · 2871 + 4239 = 7110 (N) · 4079 + 3925 = 8004 (L) · 3034 + 3985 = 7019 (U) · 4254 + 3741 = 7995 (H) · 3989 + 3111 = 7100 (G) · 2900 + 2392 = 5292 (E) · 3366 + 6337 = 9703 (C) · 3166 + 3526 = 6692 (F) · 3438 + 3836 = 7274 (D) · 3570 + 1725 = 5295 (A) · 2524 + 2521 = 5045 (R) · 2161 + 1933 = 4094 (Y) · 3752 + 2438 = 6190 (B) · 2970 + 3498 = 6468 (W)
- Clue 4 (Subtraction): "WE FOUND SILVER STRAPS CAUGHT ON THE HATCH"7222 - 1849 = 5373 (W) · 7589 - 4503 = 3086 (O) · 9166 - 1489 = 7677 (I) · 10279 - 3997 = 6282 (R) · 3740 - 579 = 3161 (A) · 12569 - 4577 = 7992 (H) · 8049 - 2339 = 5710 (P) · 8350 - 308 = 8042 (E) · 5021 - 1913 = 3108 (F) · 11550 - 3798 = 7752 (S) · 8376 - 890 = 7486 (U) · 11171 - 4438 = 6733 (T) · 9902 - 4580 = 5322 (G) · 8366 - 927 = 7439 (C) · 9446 - 1843 = 7603 (N) · 10694 - 2404 = 8290 (D) · 5149 - 96 = 5053 (L) · 11382 - 3589 = 7793 (V)
- Clue 5 (Division facts (1-12)): surviving statement (box 4) → Rigger Violet Palmer60 ÷ 5 = 12 · 8 ÷ 1 = 8 · 2 ÷ 2 = 1 · 80 ÷ 8 = 10 · 56 ÷ 8 = 7 · 22 ÷ 11 = 2 · 30 ÷ 6 = 5 · 72 ÷ 8 = 9 · 18 ÷ 6 = 3 · 54 ÷ 9 = 6 · 77 ÷ 7 = 11
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Multiplication, Rounding, Addition, Subtraction, Division
- Reading level
- grades 5-6
- Theme
- The Sky Citadel Sabotage — set in Aerie Peak Airship Dock
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects