Grade 4Reading: grades 3-4MultiplicationSubtractionAdditionRoundingDivision
The Sky Ship Mystery
A sneaky sky bandit has swiped the Golden Wind-Compass from the library! The Sky Patrol needs your help to decode the flight logs and catch the culprit before they sail beyond the horizon.
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 | Escape Gear | Pockets Tool | Goggle Status | Hair Style | Foil Item |
|---|---|---|---|---|---|
| Sally | glider wing | pocket watch | not wearing goggles | spiky hair | loud whistle |
| Clark | smoke bomb | compass | not wearing goggles | curly hair | loud whistle |
| Hazel | grappling hook | signal flag | not wearing goggles | spiky hair | tickle feather |
| Chuck | glider wing | map scroll | not wearing goggles | spiky hair | tickle feather |
| Wilbur | glider wing | signal flag | not wearing goggles | braided hair | shiny coin |
| Freya | smoke bomb | pocket watch | wearing goggles | curly hair | loud whistle |
| James | cloud shield | pocket watch | wearing goggles | spiky hair | loud whistle |
| Charles | grappling hook | pocket watch | not wearing goggles | braided hair | tickle feather |
| Jasper | cloud shield | spyglass | wearing goggles | spiky hair | tickle feather |
| Marco | cloud shield | pocket watch | wearing goggles | braided hair | tickle feather |
| Luna | wind booster | signal flag | wearing goggles | braided hair | tickle feather |
| Pip | glider wing | compass | not wearing goggles | braided hair | loud whistle |
| Rusty | cloud shield | signal flag | wearing goggles | spiky hair | tickle feather |
| Bessie | cloud shield | compass | not wearing goggles | curly hair | tickle feather |
| Amelia | wind booster | pocket watch | wearing goggles | spiky hair | tickle feather |
| Hudson | cloud shield | spyglass | not wearing goggles | spiky hair | tickle feather |
| Neil | cloud shield | pocket watch | wearing goggles | curly hair | shiny coin |
| Leo | wind booster | pocket watch | not wearing goggles | spiky hair | tickle feather |
| Buzz | smoke bomb | map scroll | wearing goggles | curly hair | shiny coin |
| Lewis | smoke bomb | spyglass | wearing goggles | braided hair | shiny coin |
| Isabella | grappling hook | compass | not wearing goggles | spiky hair | tickle feather |
Clue 1
Multiplication facts (1-12)
The Sky Patrol found rows of supply crates left behind by the runaway airship. We can find the first clue if we multiply the crates to count them all.
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
33
9
99
108
14
56
36
22
T
33
36
40
99
144
56
40
T
33
100
14
132
132
90
14
144
22
70
56
14
24
60
24
14
70
3 × 11 =T
9 × 4 =D
8 × 7 =N
7 × 2 =A
2 × 11 =I
10 × 9 =Y
6 × 10 =F
11 × 12 =R
10 × 7 =G
10 × 10 =C
12 × 12 =S
1 × 9 =H
4 × 6 =L
11 × 9 =E
10 × 4 =O
9 × 12 =B
0/16 letters found
Clue 2
Subtraction
The bandit dropped some stolen gear along the rocky ridge. If we subtract the recovered gear from the total list, we will know what is still missing.
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
7799
6981
7725
5638
7672
5638
3033
7725
8067
T
7799
6981
3395
7955
4474
1759
7121
1759
7121
7121
3460
7725
5638
1759
4474
T
7799
6981
7725
4001
6111
1087
3395
8067
7725
12220 - 4421 =T
8716 - 1044 =U
9775 - 2050 =E
8707 - 1726 =H
8577 - 2939 =S
8435 - 2324 =R
4439 - 979 =L
6395 - 2394 =I
11769 - 3702 =C
7766 - 4733 =P
2927 - 1168 =O
5712 - 2317 =A
1718 - 631 =F
7975 - 3501 =N
11637 - 4516 =G
11316 - 3361 =D
0/16 letters found
Clue 3
Addition
The dock manager tallied up the weight of all the fuel barrels loaded today. Adding these weights together will reveal our 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.
A
3393
5256
8926
9725
3477
4577
2514
9503
2514
A
3393
5256
9737
2514
4378
3846
5256
3287
4214
4214
2514
3580
5256
9737
2514
4290
8926
4577
4577
A
3393
8926
8871
1060 + 2333 =A
5254 + 3672 =I
3315 + 5556 =N
1444 + 2136 =D
2531 + 1683 =P
1593 + 1884 =K
2854 + 1723 =L
2015 + 1272 =O
5431 + 4294 =C
1333 + 1181 =E
1738 + 2552 =V
6471 + 3032 =F
2861 + 2395 =T
6430 + 3307 =H
2585 + 1261 =S
3056 + 1322 =R
0/16 letters found
Clue 4
Rounding
The tracking radar is old and only shows numbers rounded to the nearest ten. Round the radar signals to find the bandit's heading.
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
7000
50
2300
500
2300
T
7000
2300
70
T
7000
300
430
2300
3000
90
1700
4300
1100
500
3000
9000
300
110
2000
50
30
300
370
Round 7,094 to the nearest thousandT
Round 1,658 to the nearest hundredO
Round 50 to the nearest tenH
Round 456 to the nearest hundredD
Round 68 to the nearest tenC
Round 4,297 to the nearest hundredU
Round 366 to the nearest tenR
Round 31 to the nearest tenA
Round 92 to the nearest tenF
Round 110 to the nearest tenK
Round 266 to the nearest hundredI
Round 1,126 to the nearest hundredN
Round 427 to the nearest tenV
Round 2,271 to the nearest thousandY
Round 2,288 to the nearest hundredE
Round 2,698 to the nearest thousandS
Round 8,789 to the nearest thousandP
0/17 letters found
Clue 5
Division facts (1-12) — the last clue
We need to split the search patrol into equal teams to cover the canyon. Dividing the crew evenly will give us 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 = ?
16 ÷ 8 = ?
15 ÷ 5 = ?
72 ÷ 12 = ?
4 ÷ 1 = ?
42 ÷ 6 = ?
20 ÷ 4 = ?
56 ÷ 7 = ?
60 ÷ 6 = ?
88 ÷ 8 = ?
60 ÷ 5 = ?
Step 2 — cross out the sentence with each answer
1.The villain blocks the way with a cloud shield, then peeks through a spyglass.
2.The villain blasts off using a wind booster, then winds up a pocket watch.
3.The villain zooms away on a glider wing, then checks a map scroll.
4.The villain zooms away on a glider wing, then waves a signal flag.
5.The villain zooms away on a glider wing, then taps on a compass.
6.The villain vanishes behind a smoke bomb, then waves a signal flag.
7.The villain swings across with a grappling hook, then winds up a pocket watch.
8.The villain swings across with a grappling hook, then waves a signal flag.
9.The villain swings across with a grappling hook, then taps on a compass.
10.The villain vanishes behind a smoke bomb, then checks a map scroll.
11.The villain blasts off using a wind booster, then waves a signal flag.
12.The villain blasts off using a wind booster, then peeks through a spyglass.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Sky Ship Mystery
Culprit: Hudson (cloud shield · spyglass · not wearing goggles · spiky hair · tickle feather)
- Clue 1 (Multiplication facts (1-12)): "THE BANDIT DOES NOT CARRY A SIGNAL FLAG"3 × 11 = 33 (T) · 9 × 4 = 36 (D) · 8 × 7 = 56 (N) · 7 × 2 = 14 (A) · 2 × 11 = 22 (I) · 10 × 9 = 90 (Y) · 6 × 10 = 60 (F) · 11 × 12 = 132 (R) · 10 × 7 = 70 (G) · 10 × 10 = 100 (C) · 12 × 12 = 144 (S) · 1 × 9 = 9 (H) · 4 × 6 = 24 (L) · 11 × 9 = 99 (E) · 10 × 4 = 40 (O) · 9 × 12 = 108 (B)
- Clue 2 (Subtraction): "THE SUSPECT HAD NO GOGGLES ON THEIR FACE"12220 - 4421 = 7799 (T) · 8716 - 1044 = 7672 (U) · 9775 - 2050 = 7725 (E) · 8707 - 1726 = 6981 (H) · 8577 - 2939 = 5638 (S) · 8435 - 2324 = 6111 (R) · 4439 - 979 = 3460 (L) · 6395 - 2394 = 4001 (I) · 11769 - 3702 = 8067 (C) · 7766 - 4733 = 3033 (P) · 2927 - 1168 = 1759 (O) · 5712 - 2317 = 3395 (A) · 1718 - 631 = 1087 (F) · 7975 - 3501 = 4474 (N) · 11637 - 4516 = 7121 (G) · 11316 - 3361 = 7955 (D)
- Clue 3 (Addition): "A TICKLE FEATHER STOPPED THE VILLAIN"1060 + 2333 = 3393 (A) · 5254 + 3672 = 8926 (I) · 3315 + 5556 = 8871 (N) · 1444 + 2136 = 3580 (D) · 2531 + 1683 = 4214 (P) · 1593 + 1884 = 3477 (K) · 2854 + 1723 = 4577 (L) · 2015 + 1272 = 3287 (O) · 5431 + 4294 = 9725 (C) · 1333 + 1181 = 2514 (E) · 1738 + 2552 = 4290 (V) · 6471 + 3032 = 9503 (F) · 2861 + 2395 = 5256 (T) · 6430 + 3307 = 9737 (H) · 2585 + 1261 = 3846 (S) · 3056 + 1322 = 4378 (R)
- Clue 4 (Rounding): "THE DETECTIVES FOUND SPIKY HAIR"Round 7,094 to the nearest thousand = 7000 (T) · Round 1,658 to the nearest hundred = 1700 (O) · Round 50 to the nearest ten = 50 (H) · Round 456 to the nearest hundred = 500 (D) · Round 68 to the nearest ten = 70 (C) · Round 4,297 to the nearest hundred = 4300 (U) · Round 366 to the nearest ten = 370 (R) · Round 31 to the nearest ten = 30 (A) · Round 92 to the nearest ten = 90 (F) · Round 110 to the nearest ten = 110 (K) · Round 266 to the nearest hundred = 300 (I) · Round 1,126 to the nearest hundred = 1100 (N) · Round 427 to the nearest ten = 430 (V) · Round 2,271 to the nearest thousand = 2000 (Y) · Round 2,288 to the nearest hundred = 2300 (E) · Round 2,698 to the nearest thousand = 3000 (S) · Round 8,789 to the nearest thousand = 9000 (P)
- Clue 5 (Division facts (1-12)): surviving statement (box 1) → Hudson90 ÷ 10 = 9 · 16 ÷ 8 = 2 · 15 ÷ 5 = 3 · 72 ÷ 12 = 6 · 4 ÷ 1 = 4 · 42 ÷ 6 = 7 · 20 ÷ 4 = 5 · 56 ÷ 7 = 8 · 60 ÷ 6 = 10 · 88 ÷ 8 = 11 · 60 ÷ 5 = 12
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Multiplication, Subtraction, Addition, Rounding, Division
- Reading level
- grades 3-4
- Theme
- The Sky Ship Mystery — set in the floating islands of Cloud Haven
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects