Grade 4Reading: grades 3-4MultiplicationSkip countingWord problemsRoundingDivision
The Mystery of the Golden Compass
The ancient golden compass has disappeared from Jungle Explorer Camp. Someone snuck into the Head Navigator tent at night and swiped it. Uncover the clues to find the thief before the morning expedition begins.
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 | Jungle Gear | Explorer Gadget | Strap Style | Hat Color | Scared Of |
|---|---|---|---|---|---|
| Captain Jack | Smoke Bomb | Brass Spyglass | Right Shoulder Strap | Green Helmet | Loud Parrots |
| Hiker Eli | Smoke Bomb | Signal Whistle | Right Shoulder Strap | Green Helmet | Mud Traps |
| Tracker Cole | Climbing Spikes | Pocket Compass | Right Shoulder Strap | Yellow Cap | Buzzing Bees |
| Climber Ava | Machete Tool | Glow Lantern | Right Shoulder Strap | Green Helmet | Loud Parrots |
| Scout Ella | Climbing Spikes | Glow Lantern | Left Shoulder Strap | Green Helmet | Mud Traps |
| Pilot Ivy | Smoke Bomb | Glow Lantern | Left Shoulder Strap | Brown Fedora | Buzzing Bees |
| Hunter Owen | Smoke Bomb | Signal Whistle | Right Shoulder Strap | Green Helmet | Buzzing Bees |
| Hiker Nora | Smoke Bomb | Brass Spyglass | Right Shoulder Strap | Green Helmet | Mud Traps |
| Camper Luke | Climbing Spikes | Brass Spyglass | Right Shoulder Strap | Green Helmet | Mud Traps |
| Rover Mia | Climbing Spikes | Map Cylinder | Right Shoulder Strap | Yellow Cap | Loud Parrots |
| Diver Kai | Climbing Spikes | Pocket Compass | Right Shoulder Strap | Green Helmet | Mud Traps |
| Fisher Lily | Grappling Hook | Pocket Compass | Right Shoulder Strap | Green Helmet | Mud Traps |
| Tracker Nina | Smoke Bomb | Glow Lantern | Right Shoulder Strap | Brown Fedora | Mud Traps |
| Scout Sam | Rope Ladder | Pocket Compass | Right Shoulder Strap | Brown Fedora | Buzzing Bees |
| Diver Zoe | Smoke Bomb | Signal Whistle | Right Shoulder Strap | Brown Fedora | Mud Traps |
| Explorer Maya | Grappling Hook | Signal Whistle | Right Shoulder Strap | Yellow Cap | Mud Traps |
| Ranger Leo | Grappling Hook | Signal Whistle | Right Shoulder Strap | Green Helmet | Mud Traps |
| Pilot Chloe | Machete Tool | Glow Lantern | Left Shoulder Strap | Green Helmet | Mud Traps |
| Trekker Noah | Smoke Bomb | Glow Lantern | Right Shoulder Strap | Green Helmet | Loud Parrots |
| Guide Ben | Machete Tool | Glow Lantern | Right Shoulder Strap | Brown Fedora | Mud Traps |
| Rover Liam | Machete Tool | Brass Spyglass | Left Shoulder Strap | Green Helmet | Mud Traps |
Clue 1
Multiplication facts (1-12)
To count the rows of supplies in the expedition tent, solve this multiplication problem.
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
4
108
6
2
8
100
100
3
8
45
33
35
6
66
45
35
T
4
12
3
55
55
21
3
14
55
3
66
66
66
96
21
56
100
3
66
66
2 × 2 =T
7 × 3 =Y
3 × 4 =C
8 × 12 =P
7 × 2 =B
1 × 8 =I
12 × 9 =H
5 × 11 =R
10 × 10 =L
1 × 2 =V
1 × 3 =A
7 × 5 =O
7 × 8 =G
6 × 11 =S
3 × 2 =E
3 × 11 =D
9 × 5 =N
0/17 letters found
Clue 2
Skip counting
To follow the trail of wooden stakes along the river, skip count to find the next mark.
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
21
42
100
8
36
8
27
100
120
T
21
40
100
14
110
8
14
110
60
22
42
T
21
8
42
140
36
9
70
100
110
8
T
21
110
14
27
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, ___, 24, 27T
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, ___, 110, 120E
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, ___, 45, 48H
Skip-count by 10s. Fill the blank: 10, 20, 30, ___, 50, 60W
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, ___, 39, 42U
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, ___, 16, 18A
Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15L
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, ___, 24, 26G
Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12S
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33P
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, ___, 80, 90D
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, ___, 150, 160O
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, ___, 70, 80I
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130R
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, ___, 130, 140C
0/15 letters found
Clue 3
Word problems
Read this field log story problem carefully to uncover the next clue.
Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.
Someonescaredthevillainoffwith .
M
47
8
70
80
43
20
68
S
There were 65 compasses. 18 were used up. How many compasses are left?M
Ranger lined up 10 rows of 2 expedition maps. How many expedition maps in all?A
There were 103 climbing ropes. 23 were used up. How many climbing ropes are left?T
Ranger found 3 lantern batteries yesterday and 5 more today. How many lantern batteries in all?U
Ranger lined up 7 rows of 10 expedition maps. How many expedition maps in all?D
Ranger found 14 lantern batteries yesterday and 54 more today. How many lantern batteries in all?P
There were 48 compasses. 5 were used up. How many compasses are left?R
0/7 letters found
Clue 4
Rounding
The digital scout sensor shows rounded numbers on its screen.
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
900
70
290
1300
1300
7000
370
1300
2300
9000
1300
200
130
A
900
5000
1100
50
300
7000
700
7000
1300
A
900
290
200
370
1300
200
290
1300
1300
370
50
300
5000
1300
Round 937 to the nearest hundredA
Round 48 to the nearest tenO
Round 67 to the nearest tenG
Round 128 to the nearest tenW
Round 238 to the nearest hundredT
Round 2,292 to the nearest hundredL
Round 369 to the nearest tenH
Round 9,432 to the nearest thousandM
Round 1,330 to the nearest hundredE
Round 660 to the nearest hundredD
Round 7,160 to the nearest thousandN
Round 290 to the nearest tenR
Round 1,088 to the nearest hundredF
Round 5,429 to the nearest thousandS
Round 316 to the nearest hundredU
0/15 letters found
Clue 5
Division facts (1-12) — the last clue
To split the camp gear equally among the explorer squads, solve this division problem.
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
21 ÷ 7 = ?
54 ÷ 9 = ?
8 ÷ 8 = ?
66 ÷ 6 = ?
24 ÷ 12 = ?
4 ÷ 1 = ?
40 ÷ 5 = ?
27 ÷ 3 = ?
25 ÷ 5 = ?
70 ÷ 10 = ?
24 ÷ 2 = ?
Step 2 — cross out the sentence with each answer
1.The villain swung across the canyon with a grappling hook, then alerted nearby monkeys with a signal whistle.
2.The villain cleared the thick vines with a machete tool, then lit up the hidden cave with a glow lantern.
3.The villain swung across the canyon with a grappling hook, then checked the ancient path with a pocket compass.
4.The villain vanished into the brush with a smoke bomb, then checked the ancient path with a pocket compass.
5.The villain vanished into the brush with a smoke bomb, then scouted the distant river with a brass spyglass.
6.The villain vanished into the brush with a smoke bomb, then alerted nearby monkeys with a signal whistle.
7.The villain scaled the tall wall using a rope ladder, then alerted nearby monkeys with a signal whistle.
8.The villain swung across the canyon with a grappling hook, then scouted the distant river with a brass spyglass.
9.The villain cleared the thick vines with a machete tool, then checked the ancient path with a pocket compass.
10.The villain climbed the slippery ridge using climbing spikes, then checked the ancient path with a pocket compass.
11.The villain scaled the tall wall using a rope ladder, then scouted the distant river with a brass spyglass.
12.The villain scaled the tall wall using a rope ladder, then stashed the golden map inside a map cylinder.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Mystery of the Golden Compass
Culprit: Diver Kai (Climbing Spikes · Pocket Compass · Right Shoulder Strap · Green Helmet · Mud Traps)
- Clue 1 (Multiplication facts (1-12)): "THE VILLAIN DOES NOT CARRY A BRASS SPYGLASS"2 × 2 = 4 (T) · 7 × 3 = 21 (Y) · 3 × 4 = 12 (C) · 8 × 12 = 96 (P) · 7 × 2 = 14 (B) · 1 × 8 = 8 (I) · 12 × 9 = 108 (H) · 5 × 11 = 55 (R) · 10 × 10 = 100 (L) · 1 × 2 = 2 (V) · 1 × 3 = 3 (A) · 7 × 5 = 35 (O) · 7 × 8 = 56 (G) · 6 × 11 = 66 (S) · 3 × 2 = 6 (E) · 3 × 11 = 33 (D) · 9 × 5 = 45 (N)
- Clue 2 (Skip counting): "THE SUSPECT WEARS A RIGHT SHOULDER STRAP"Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, ___, 24, 27 = 21 (T) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, ___, 110, 120 = 100 (E) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, ___, 45, 48 = 42 (H) · Skip-count by 10s. Fill the blank: 10, 20, 30, ___, 50, 60 = 40 (W) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, ___, 39, 42 = 36 (U) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, ___, 16, 18 = 14 (A) · Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15 = 9 (L) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, ___, 24, 26 = 22 (G) · Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12 = 8 (S) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33 = 27 (P) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, ___, 80, 90 = 70 (D) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, ___, 150, 160 = 140 (O) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, ___, 70, 80 = 60 (I) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130 = 110 (R) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, ___, 130, 140 = 120 (C)
- Clue 3 (Word problems): "MUD TRAPS"There were 65 compasses. 18 were used up. How many compasses are left? = 47 (M) · Ranger lined up 10 rows of 2 expedition maps. How many expedition maps in all? = 20 (A) · There were 103 climbing ropes. 23 were used up. How many climbing ropes are left? = 80 (T) · Ranger found 3 lantern batteries yesterday and 5 more today. How many lantern batteries in all? = 8 (U) · Ranger lined up 7 rows of 10 expedition maps. How many expedition maps in all? = 70 (D) · Ranger found 14 lantern batteries yesterday and 54 more today. How many lantern batteries in all? = 68 (P) · There were 48 compasses. 5 were used up. How many compasses are left? = 43 (R)
- Clue 4 (Rounding): "A GREEN HELMET WAS FOUND NEAR THE TREEHOUSE"Round 937 to the nearest hundred = 900 (A) · Round 48 to the nearest ten = 50 (O) · Round 67 to the nearest ten = 70 (G) · Round 128 to the nearest ten = 130 (W) · Round 238 to the nearest hundred = 200 (T) · Round 2,292 to the nearest hundred = 2300 (L) · Round 369 to the nearest ten = 370 (H) · Round 9,432 to the nearest thousand = 9000 (M) · Round 1,330 to the nearest hundred = 1300 (E) · Round 660 to the nearest hundred = 700 (D) · Round 7,160 to the nearest thousand = 7000 (N) · Round 290 to the nearest ten = 290 (R) · Round 1,088 to the nearest hundred = 1100 (F) · Round 5,429 to the nearest thousand = 5000 (S) · Round 316 to the nearest hundred = 300 (U)
- Clue 5 (Division facts (1-12)): surviving statement (box 10) → Diver Kai21 ÷ 7 = 3 · 54 ÷ 9 = 6 · 8 ÷ 8 = 1 · 66 ÷ 6 = 11 · 24 ÷ 12 = 2 · 4 ÷ 1 = 4 · 40 ÷ 5 = 8 · 27 ÷ 3 = 9 · 25 ÷ 5 = 5 · 70 ÷ 10 = 7 · 24 ÷ 2 = 12
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Multiplication, Skip counting, Word problems, Rounding, Division
- Reading level
- grades 3-4
- Theme
- The Mystery of the Golden Compass — set in Jungle Explorer Camp
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects