Grade 4Reading: grades 5-6RoundingAdditionSubtractionMultiplicationDivision
The Sky Bandit of Nimbus Bay
The legendary sky-compass has been stolen from the high tower of Nimbus Bay! A rogue pilot slipped past the guard balloons under the cover of night. We must search the docks and skies to solve the mystery.
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 | Skyship Type | Gadget Choice | Steering Hand | Hair Color | Biggest Fear |
|---|---|---|---|---|---|
| Orville Wright | Biplane | Grappling Hook | Left-handed pilot | Golden Hair | Fear of heights |
| Aero Arthur | Glider | Grappling Hook | Right-handed pilot | Golden Hair | Fear of heights |
| Gale Force Gary | Steam-Copter | Smoke Bomb | Right-handed pilot | Crimson Hair | Fear of heights |
| Baron Von Red | Biplane | Harpoon Gun | Left-handed pilot | Golden Hair | Fear of seagulls |
| Cloudy Chloe | Steam-Copter | Harpoon Gun | Left-handed pilot | Crimson Hair | Fear of seagulls |
| Skyler Swift | Jet-Balloon | Smoke Bomb | Left-handed pilot | Crimson Hair | Fear of heights |
| Navigator Ned | Biplane | Grappling Hook | Left-handed pilot | Crimson Hair | Fear of seagulls |
| Windy Wendy | Steam-Copter | Wind Bellows | Right-handed pilot | Golden Hair | Fear of heights |
| Glider Grace | Biplane | Smoke Bomb | Left-handed pilot | Golden Hair | Fear of seagulls |
| Zephyr Zach | Jet-Balloon | Grappling Hook | Left-handed pilot | Golden Hair | Fear of lightning |
| Wilbur Wright | Glider | Grappling Hook | Left-handed pilot | Golden Hair | Fear of lightning |
| Propeller Paula | Glider | Wind Bellows | Left-handed pilot | Crimson Hair | Fear of heights |
| Sky-Skimmer Sam | Jet-Balloon | Net Launcher | Left-handed pilot | Golden Hair | Fear of heights |
| Captain Kidd | Glider | Net Launcher | Left-handed pilot | Crimson Hair | Fear of heights |
| Stormy Stella | Jet-Balloon | Net Launcher | Left-handed pilot | Silver Hair | Fear of heights |
| Helicopter Harry | Steam-Copter | Smoke Bomb | Left-handed pilot | Golden Hair | Fear of heights |
| Captain Barnaby | Steam-Copter | Wind Bellows | Right-handed pilot | Silver Hair | Fear of seagulls |
| Breezy Beatrice | Zeppelin | Net Launcher | Right-handed pilot | Golden Hair | Fear of seagulls |
| Jetpack Jack | Glider | Grappling Hook | Left-handed pilot | Golden Hair | Fear of heights |
| Fearless Fiona | Biplane | Net Launcher | Left-handed pilot | Crimson Hair | Fear of heights |
| Charles Lindy | Zeppelin | Wind Bellows | Left-handed pilot | Golden Hair | Fear of heights |
Clue 1
Rounding
We checked the tower wind-speed dial, but it is badly cracked. It only shows the wind speed rounded to the nearest ten knots. Let's round the display to decode our first 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
110
900
230
90
700
4300
4300
9000
700
50
3000
20
230
300
50
20
T
110
370
300
230
9000
50
230
T
110
4300
9000
370
50
2300
900
230
170
Round 110 to the nearest tenT
Round 167 to the nearest tenR
Round 2,277 to the nearest hundredC
Round 347 to the nearest hundredS
Round 4,298 to the nearest hundredL
Round 9,265 to the nearest thousandA
Round 86 to the nearest tenV
Round 19 to the nearest tenO
Round 896 to the nearest hundredH
Round 373 to the nearest tenU
Round 233 to the nearest tenE
Round 54 to the nearest tenN
Round 2,530 to the nearest thousandD
Round 724 to the nearest hundredI
0/14 letters found
Clue 2
Addition
The patrol crew found several bags of dropped cargo scattered across the lower sky-docks. Let's add all the recovered items together to see what the thief left behind.
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
2784
5848
5471
7615
6803
5818
T
2784
8354
6803
9353
7204
6234
5471
8354
5471
7636
6227
7204
5848
5471
9817
T
2784
6803
T
2784
5848
5471
9353
5471
4676
T
2784
1659 + 1125 =T
1883 + 3965 =H
2268 + 4535 =O
2482 + 3336 =N
2308 + 3163 =E
3102 + 6715 =D
2115 + 2561 =F
2172 + 4062 =W
6486 + 2867 =L
4232 + 2972 =S
3559 + 4056 =C
3256 + 5098 =R
3123 + 4513 =P
3391 + 2836 =U
0/14 letters found
Clue 3
Subtraction
Our main engine fuel tank was siphoned during the heist. By subtracting the remaining fuel from the starting amount, we can calculate how far the getaway ship can travel.
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
4479
5894
6448
3758
5164
2720
6602
2926
4423
5741
6448
8123
3215
5894
6448
6602
6628
7309
3758
2926
6602
1420
2720
4125
1152
4460
6448
4423
7309
1152
6965
8123
1861
5710 - 1231 =T
11423 - 4114 =L
8425 - 4002 =C
4530 - 405 =B
5605 - 1145 =V
8087 - 2193 =H
4797 - 1039 =Y
7816 - 851 =U
9950 - 3502 =E
7314 - 4388 =I
5913 - 172 =K
4855 - 2994 =S
8467 - 344 =D
5633 - 4481 =O
8660 - 2058 =N
6300 - 1136 =P
5725 - 3005 =A
6802 - 174 =F
5307 - 3887 =G
7615 - 4400 =W
0/20 letters found
Clue 4
Multiplication facts (1-12)
The sky-dock warehouse has crates stacked in neat, even rows. To find out if any navigation tools are missing, we must multiply the number of rows by the crates in each row.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
S
12
90
110
1
110
1
6
32
55
9
9
54
108
S
12
20
80
40
1
33
S
12
10
9
22
1
6
20
54
20
90
55
S
12
55
40
20
12 × 1 =S
2 × 10 =T
10 × 8 =R
5 × 2 =C
10 × 9 =H
6 × 1 =G
11 × 10 =I
5 × 8 =A
11 × 3 =D
1 × 1 =N
1 × 9 =L
11 × 2 =U
11 × 5 =E
6 × 9 =O
4 × 8 =Y
12 × 9 =W
0/16 letters found
Clue 5
Division facts (1-12) — the last clue
The Nimbus Patrol needs to split up the remaining search sectors equally among their scout ships. If we divide the total map squares by our number of scouts, we will find 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
132 ÷ 12 = ?
7 ÷ 7 = ?
5 ÷ 1 = ?
36 ÷ 4 = ?
8 ÷ 1 = ?
132 ÷ 11 = ?
14 ÷ 7 = ?
120 ÷ 12 = ?
48 ÷ 8 = ?
63 ÷ 9 = ?
44 ÷ 11 = ?
Step 2 — cross out the sentence with each answer
1.The villain steered the massive zeppelin, then blasted away using the wind bellows.
2.The villain hovered close in the steam-copter, then blasted away using the wind bellows.
3.The villain hovered close in the steam-copter, then vanished behind a thick smoke bomb.
4.The villain roared past in the biplane, then vanished behind a thick smoke bomb.
5.The villain roared past in the biplane, then escaped by swinging from a grappling hook.
6.The villain swooped down on the glider, then vanished behind a thick smoke bomb.
7.The villain steered the massive zeppelin, then escaped by swinging from a grappling hook.
8.The villain swooped down on the glider, then blasted away using the wind bellows.
9.The villain drifted quietly in the jet-balloon, then blasted away using the wind bellows.
10.The villain hovered close in the steam-copter, then tangled the pursuit ship with a net launcher.
11.The villain swooped down on the glider, then escaped by swinging from a grappling hook.
12.The villain drifted quietly in the jet-balloon, then tangled the pursuit ship with a net launcher.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Sky Bandit of Nimbus Bay
Culprit: Helicopter Harry (Steam-Copter · Smoke Bomb · Left-handed pilot · Golden Hair · Fear of heights)
- Clue 1 (Rounding): "THE VILLAIN DOES NOT USE A NET LAUNCHER"Round 110 to the nearest ten = 110 (T) · Round 167 to the nearest ten = 170 (R) · Round 2,277 to the nearest hundred = 2300 (C) · Round 347 to the nearest hundred = 300 (S) · Round 4,298 to the nearest hundred = 4300 (L) · Round 9,265 to the nearest thousand = 9000 (A) · Round 86 to the nearest ten = 90 (V) · Round 19 to the nearest ten = 20 (O) · Round 896 to the nearest hundred = 900 (H) · Round 373 to the nearest ten = 370 (U) · Round 233 to the nearest ten = 230 (E) · Round 54 to the nearest ten = 50 (N) · Round 2,530 to the nearest thousand = 3000 (D) · Round 724 to the nearest hundred = 700 (I)
- Clue 2 (Addition): "THE CONTROLS WERE PUSHED TO THE LEFT"1659 + 1125 = 2784 (T) · 1883 + 3965 = 5848 (H) · 2268 + 4535 = 6803 (O) · 2482 + 3336 = 5818 (N) · 2308 + 3163 = 5471 (E) · 3102 + 6715 = 9817 (D) · 2115 + 2561 = 4676 (F) · 2172 + 4062 = 6234 (W) · 6486 + 2867 = 9353 (L) · 4232 + 2972 = 7204 (S) · 3559 + 4056 = 7615 (C) · 3256 + 5098 = 8354 (R) · 3123 + 4513 = 7636 (P) · 3391 + 2836 = 6227 (U)
- Clue 3 (Subtraction): "THEY PANICKED WHEN FLYING ABOVE CLOUDS"5710 - 1231 = 4479 (T) · 11423 - 4114 = 7309 (L) · 8425 - 4002 = 4423 (C) · 4530 - 405 = 4125 (B) · 5605 - 1145 = 4460 (V) · 8087 - 2193 = 5894 (H) · 4797 - 1039 = 3758 (Y) · 7816 - 851 = 6965 (U) · 9950 - 3502 = 6448 (E) · 7314 - 4388 = 2926 (I) · 5913 - 172 = 5741 (K) · 4855 - 2994 = 1861 (S) · 8467 - 344 = 8123 (D) · 5633 - 4481 = 1152 (O) · 8660 - 2058 = 6602 (N) · 6300 - 1136 = 5164 (P) · 5725 - 3005 = 2720 (A) · 6802 - 174 = 6628 (F) · 5307 - 3887 = 1420 (G) · 7615 - 4400 = 3215 (W)
- Clue 4 (Multiplication facts (1-12)): "SHINING YELLOW STRANDS CLUNG TO THE SEAT"12 × 1 = 12 (S) · 2 × 10 = 20 (T) · 10 × 8 = 80 (R) · 5 × 2 = 10 (C) · 10 × 9 = 90 (H) · 6 × 1 = 6 (G) · 11 × 10 = 110 (I) · 5 × 8 = 40 (A) · 11 × 3 = 33 (D) · 1 × 1 = 1 (N) · 1 × 9 = 9 (L) · 11 × 2 = 22 (U) · 11 × 5 = 55 (E) · 6 × 9 = 54 (O) · 4 × 8 = 32 (Y) · 12 × 9 = 108 (W)
- Clue 5 (Division facts (1-12)): surviving statement (box 3) → Helicopter Harry132 ÷ 12 = 11 · 7 ÷ 7 = 1 · 5 ÷ 1 = 5 · 36 ÷ 4 = 9 · 8 ÷ 1 = 8 · 132 ÷ 11 = 12 · 14 ÷ 7 = 2 · 120 ÷ 12 = 10 · 48 ÷ 8 = 6 · 63 ÷ 9 = 7 · 44 ÷ 11 = 4
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Rounding, Addition, Subtraction, Multiplication, Division
- Reading level
- grades 5-6
- Theme
- The Sky Bandit of Nimbus Bay — set in Nimbus Bay, a floating harbor city in the clouds
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects