Grade 4Reading: grades 3-4RoundingBar modelsWord problemsAdditionDivision
The Case of the Missing Sun Stone
Someone snuck into the jungle camp and stole the ancient golden Sun Stone! Detective, solve the math clues to uncover 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 | Tool | Gadget | Stance | Hat Color | Fear |
|---|---|---|---|---|---|
| Scout Ben | torch | mini tracker | left handed | green beanie | fear of bats |
| Tracker Tina | magnifying glass | glider wings | left handed | green beanie | fear of heights |
| Officer Otto | scout whistle | flash beacon | left handed | brown fedora | fear of bats |
| Captain Barnaby | torch | mini tracker | left handed | green beanie | fear of heights |
| Guide Greta | grapple hook | flash beacon | right handed | red cap | fear of heights |
| Ranger Rosa | compass | mini tracker | left handed | brown fedora | fear of bats |
| Diver Duke | scout whistle | glider wings | right handed | red cap | fear of heights |
| Guide Gabe | torch | glider wings | left handed | brown fedora | fear of bats |
| Officer Owen | grapple hook | net launcher | right handed | brown fedora | fear of bats |
| Trekker Tara | scout whistle | flash beacon | left handed | red cap | fear of heights |
| Explorer Ed | grapple hook | smoke bomb | right handed | red cap | fear of heights |
| Pilot Paige | torch | mini tracker | left handed | brown fedora | fear of heights |
| Explorer Sam | compass | glider wings | left handed | brown fedora | fear of bats |
| Agent Alex | magnifying glass | flash beacon | left handed | brown fedora | fear of spiders |
| Scout Maya | magnifying glass | glider wings | right handed | green beanie | fear of heights |
| Professor Plum | compass | mini tracker | left handed | brown fedora | fear of heights |
| Diver Dan | magnifying glass | mini tracker | right handed | green beanie | fear of bats |
| Navigator Nora | grapple hook | glider wings | right handed | green beanie | fear of bats |
| Hiker Hank | compass | flash beacon | left handed | green beanie | fear of bats |
| Pilot Penny | magnifying glass | glider wings | left handed | brown fedora | fear of bats |
| Rover Rita | grapple hook | glider wings | right handed | green beanie | fear of heights |
Clue 1
Rounding
We found field notes with supply counts written in word problems.
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
3700
5000
30
900
130
3000
3000
370
130
1300
70
300
30
500
1300
300
T
3700
90
500
30
370
1100
3000
370
500
5000
20
30
370
7000
300
1300
Round 3,718 to the nearest hundredT
Round 1,117 to the nearest hundredF
Round 94 to the nearest tenU
Round 71 to the nearest tenD
Round 19 to the nearest tenB
Round 134 to the nearest tenI
Round 465 to the nearest hundredS
Round 5,326 to the nearest thousandH
Round 291 to the nearest hundredO
Round 1,319 to the nearest hundredN
Round 31 to the nearest tenE
Round 371 to the nearest tenA
Round 6,775 to the nearest thousandC
Round 858 to the nearest hundredV
Round 2,561 to the nearest thousandL
0/15 letters found
Clue 2
Bar model word problems
A sketch pad showed comparative bar models of path distances.
Draw a bar model to solve each word problem. Its answer reveals a letter — write the letters in the boxes to fill in the missing word.
Awitnesssawthevillainwas .
L
92
104
31
69
73
46
57
D
104
D
Lead scout shares 184 expedition canteens equally among 2 teams. How many expedition canteens does each team get?
draw a bar model
Answer:→L
Lead scout has 62 climbing carabiners, packed 2 to a bag. How many bags can be filled?
draw a bar model
Answer:→F
The red team has 80 expedition canteens and the blue team has 23 expedition canteens. How many more expedition canteens does the red team have?
draw a bar model
Answer:→N
There were 105 trail maps in all. 36 trail maps were used. How many trail maps are left?
draw a bar model
Answer:→T
Lead scout shares 184 trail maps equally among 4 teams. How many trail maps does each team get?
draw a bar model
Answer:→A
Lead scout has 208 expedition canteens, packed 2 to a bag. How many bags can be filled?
draw a bar model
Answer:→E
One group collected 56 jungle ropes and another group collected 17 jungle ropes. How many jungle ropes in all?
draw a bar model
Answer:→H
0/7 letters found
Clue 3
Word problems
The digital radar readout only displays rounded distance values.
Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.
Someonescaredthevillainoffwith .
F
48
22
8
63
13
F
48
72
8
12
S
There were 60 climbing carabiners. 12 were used up. How many climbing carabiners are left?F
There were 23 expedition canteens. 10 were used up. How many expedition canteens are left?O
Lead scout lined up 9 rows of 7 ancient coins. How many ancient coins in all?R
Lead scout found 2 climbing carabiners yesterday and 6 more today. How many climbing carabiners in all?A
Lead scout lined up 9 rows of 8 trail maps. How many trail maps in all?B
Lead scout found 4 jungle ropes yesterday and 18 more today. How many jungle ropes in all?E
Lead scout found 4 jungle ropes yesterday and 8 more today. How many jungle ropes in all?T
0/7 letters found
Clue 4
Addition
We tallied the total gear footprints left in the mud.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
B
3532
8820
6373
9466
5116
5756
4996
7121
6157
2629
B
3532
9743
8820
6714
9466
9743
8820
9743
6157
6373
6641
5116
6461
4996
7121
7121
5756
9743
9786
4996
9319
4949
1520 + 2012 =B
2578 + 4063 =U
3267 + 3106 =O
3236 + 1760 =A
4785 + 4681 =W
2309 + 2807 =N
5834 + 3909 =E
5532 + 3288 =R
3269 + 6050 =M
4760 + 5026 =C
1796 + 833 =I
3279 + 2878 =F
4129 + 2332 =D
2657 + 4464 =T
3703 + 2053 =H
3964 + 2750 =S
2164 + 2785 =P
0/17 letters found
Clue 5
Division facts (1-12) — the last clue
The shared trail snacks were divided equally among suspects.
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
36 ÷ 9 = ?
35 ÷ 7 = ?
21 ÷ 3 = ?
12 ÷ 1 = ?
44 ÷ 4 = ?
30 ÷ 10 = ?
8 ÷ 1 = ?
90 ÷ 10 = ?
30 ÷ 5 = ?
100 ÷ 10 = ?
12 ÷ 6 = ?
Step 2 — cross out the sentence with each answer
1.The villain navigated the maze with a compass, then tracked the patrol route with a mini tracker.
2.The villain examined the hidden clue with a magnifying glass, then trapped the camp guard with a net launcher.
3.The villain swung across the ravine with a grapple hook, then escaped over the trees using glider wings.
4.The villain navigated the maze with a compass, then escaped over the trees using glider wings.
5.The villain lit up the dark tunnel with a torch, then escaped over the trees using glider wings.
6.The villain lit up the dark tunnel with a torch, then trapped the camp guard with a net launcher.
7.The villain examined the hidden clue with a magnifying glass, then escaped over the trees using glider wings.
8.The villain examined the hidden clue with a magnifying glass, then blinded the guards with a flash beacon.
9.The villain signaled their partner with a scout whistle, then vanished into the night with a smoke bomb.
10.The villain lit up the dark tunnel with a torch, then tracked the patrol route with a mini tracker.
11.The villain signaled their partner with a scout whistle, then trapped the camp guard with a net launcher.
12.The villain examined the hidden clue with a magnifying glass, then tracked the patrol route with a mini tracker.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Case of the Missing Sun Stone
Culprit: Ranger Rosa (compass · mini tracker · left handed · brown fedora · fear of bats)
- Clue 1 (Rounding): "THE VILLAIN DOES NOT USE A FLASH BEACON"Round 3,718 to the nearest hundred = 3700 (T) · Round 1,117 to the nearest hundred = 1100 (F) · Round 94 to the nearest ten = 90 (U) · Round 71 to the nearest ten = 70 (D) · Round 19 to the nearest ten = 20 (B) · Round 134 to the nearest ten = 130 (I) · Round 465 to the nearest hundred = 500 (S) · Round 5,326 to the nearest thousand = 5000 (H) · Round 291 to the nearest hundred = 300 (O) · Round 1,319 to the nearest hundred = 1300 (N) · Round 31 to the nearest ten = 30 (E) · Round 371 to the nearest ten = 370 (A) · Round 6,775 to the nearest thousand = 7000 (C) · Round 858 to the nearest hundred = 900 (V) · Round 2,561 to the nearest thousand = 3000 (L)
- Clue 2 (Bar model word problems): "LEFT HANDED"Lead scout shares 184 expedition canteens equally among 2 teams. How many expedition canteens does each team get? = 92 (L) · Lead scout has 62 climbing carabiners, packed 2 to a bag. How many bags can be filled? = 31 (F) · The red team has 80 expedition canteens and the blue team has 23 expedition canteens. How many more expedition canteens does the red team have? = 57 (N) · There were 105 trail maps in all. 36 trail maps were used. How many trail maps are left? = 69 (T) · Lead scout shares 184 trail maps equally among 4 teams. How many trail maps does each team get? = 46 (A) · Lead scout has 208 expedition canteens, packed 2 to a bag. How many bags can be filled? = 104 (E) · One group collected 56 jungle ropes and another group collected 17 jungle ropes. How many jungle ropes in all? = 73 (H)
- Clue 3 (Word problems): "FEAR OF BATS"There were 60 climbing carabiners. 12 were used up. How many climbing carabiners are left? = 48 (F) · There were 23 expedition canteens. 10 were used up. How many expedition canteens are left? = 13 (O) · Lead scout lined up 9 rows of 7 ancient coins. How many ancient coins in all? = 63 (R) · Lead scout found 2 climbing carabiners yesterday and 6 more today. How many climbing carabiners in all? = 8 (A) · Lead scout lined up 9 rows of 8 trail maps. How many trail maps in all? = 72 (B) · Lead scout found 4 jungle ropes yesterday and 18 more today. How many jungle ropes in all? = 22 (E) · Lead scout found 4 jungle ropes yesterday and 8 more today. How many jungle ropes in all? = 12 (T)
- Clue 4 (Addition): "BROWN HAT FIBERS WERE FOUND AT THE CAMP"1520 + 2012 = 3532 (B) · 2578 + 4063 = 6641 (U) · 3267 + 3106 = 6373 (O) · 3236 + 1760 = 4996 (A) · 4785 + 4681 = 9466 (W) · 2309 + 2807 = 5116 (N) · 5834 + 3909 = 9743 (E) · 5532 + 3288 = 8820 (R) · 3269 + 6050 = 9319 (M) · 4760 + 5026 = 9786 (C) · 1796 + 833 = 2629 (I) · 3279 + 2878 = 6157 (F) · 4129 + 2332 = 6461 (D) · 2657 + 4464 = 7121 (T) · 3703 + 2053 = 5756 (H) · 3964 + 2750 = 6714 (S) · 2164 + 2785 = 4949 (P)
- Clue 5 (Division facts (1-12)): surviving statement (box 1) → Ranger Rosa36 ÷ 9 = 4 · 35 ÷ 7 = 5 · 21 ÷ 3 = 7 · 12 ÷ 1 = 12 · 44 ÷ 4 = 11 · 30 ÷ 10 = 3 · 8 ÷ 1 = 8 · 90 ÷ 10 = 9 · 30 ÷ 5 = 6 · 100 ÷ 10 = 10 · 12 ÷ 6 = 2
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Rounding, Bar models, Word problems, Addition, Division
- Reading level
- grades 3-4
- Theme
- The Case of the Missing Sun Stone — set in The Sunken Jungle Temple
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects