Grade 4Reading: grades 3-4MultiplicationAdditionWord problemsMulti-step word problemsDivision
The Lost Idol of Mystery Island
Someone snuck into the camp supply tent and took the Golden Monkey Statue! Detective, use the camp logs and track the suspect before they escape into the jungle.
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 | Secondary Gear | Dominant Hand | Hair Style | Secret Weakness |
|---|---|---|---|---|---|
| Junior Jack | Compass | Canteen | Right Handed | Curly Red Hair | Allergic To Mud |
| Agent Artie | Compass | Canteen | Left Handed | Spiky Black Hair | Scared Of Bugs |
| Trekker Tina | Smoke Bomb | Metal Detector | Left Handed | Spiky Black Hair | Allergic To Mud |
| Pilot Pam | Machete | Canteen | Left Handed | Braided Brown Hair | Scared Of Bugs |
| Hiker Holly | Smoke Bomb | Paraglider | Right Handed | Braided Brown Hair | Scared Of Bugs |
| Tracker Tess | Grappling Hook | Paraglider | Left Handed | Braided Brown Hair | Allergic To Mud |
| Guide Gabe | Machete | Paraglider | Left Handed | Spiky Black Hair | Sneeze At Pepper |
| Chief Chloe | Flashlight | Canteen | Right Handed | Curly Red Hair | Allergic To Mud |
| Captain Cody | Machete | Canteen | Left Handed | Spiky Black Hair | Allergic To Mud |
| Inspector Ian | Smoke Bomb | Canteen | Right Handed | Spiky Black Hair | Allergic To Mud |
| Scout Sam | Compass | Metal Detector | Right Handed | Spiky Black Hair | Sneeze At Pepper |
| Sailor Seth | Smoke Bomb | Walkie Talkie | Left Handed | Spiky Black Hair | Allergic To Mud |
| Ranger Rick | Grappling Hook | Metal Detector | Left Handed | Braided Brown Hair | Sneeze At Pepper |
| Officer Olivia | Grappling Hook | Paraglider | Right Handed | Curly Red Hair | Sneeze At Pepper |
| Detective Dave | Smoke Bomb | Metal Detector | Left Handed | Braided Brown Hair | Allergic To Mud |
| Hunter Hannah | Grappling Hook | Paraglider | Right Handed | Curly Red Hair | Allergic To Mud |
| Finder Faye | Smoke Bomb | Paraglider | Left Handed | Spiky Black Hair | Sneeze At Pepper |
| Explorer Emma | Compass | Paraglider | Left Handed | Spiky Black Hair | Allergic To Mud |
| Pathfinder Pete | Grappling Hook | Paraglider | Left Handed | Spiky Black Hair | Allergic To Mud |
| Rover Rita | Smoke Bomb | Walkie Talkie | Left Handed | Spiky Black Hair | Scared Of Bugs |
| Drifter Dan | Machete | Paraglider | Right Handed | Spiky Black Hair | Allergic To Mud |
Clue 1
Multiplication facts (1-12)
You count equal stacks of jungle gear to decode the first secret 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.
T
121
70
120
28
60
66
66
33
60
2
36
8
120
5
2
8
T
121
12
5
120
33
21
33
2
T
121
120
120
2
11 × 11 =T
5 × 1 =S
12 × 5 =I
7 × 4 =V
3 × 7 =C
6 × 11 =L
3 × 12 =D
3 × 4 =U
10 × 12 =E
8 × 1 =O
1 × 2 =N
10 × 7 =H
3 × 11 =A
0/13 letters found
Clue 2
Addition
You total up all the footprints found near the river bank.
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
2849
3348
3466
6924
9445
4969
4969
3683
9445
2567
4969
3466
6056
T
2849
3683
4969
3466
6056
T
2849
3348
3683
2567
8749
5277
6461
9445
2567
T
2849
9794
2567
T
2849
3348
3466
T
2849
3466
2567
T
2849
1186 + 1663 =T
1202 + 2146 =H
4144 + 1912 =F
2648 + 3813 =R
6804 + 2990 =O
1512 + 1954 =E
1610 + 2073 =A
2066 + 2903 =L
3815 + 4934 =D
3119 + 3805 =V
1371 + 1196 =N
1786 + 3491 =P
5875 + 3570 =I
0/13 letters found
Clue 3
Word problems
You solve a camp log riddle about supplies missing from the tent.
Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.
Someonescaredthevillainoffwith .
A
52
8
8
25
80
22
53
35
T
O
M
U
D
There were 78 flashlights. 26 were used up. How many flashlights are left?A
Ranger lined up 10 rows of 8 canteens. How many canteens in all?R
Ranger lined up 5 rows of 7 maps. How many maps in all?C
Ranger found 42 rope bundles yesterday and 11 more today. How many rope bundles in all?I
There were 46 maps. 24 were used up. How many maps are left?G
Ranger found 10 flashlights yesterday and 15 more today. How many flashlights in all?E
Ranger lined up 2 rows of 4 flashlights. How many flashlights in all?L
0/7 letters found
Clue 4
Multi-step word problems
You calculate the travel times and gear used during the night shift.
Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.
Astrandof hairturnedupatthescene.
S
74
16
42
19
72
85
21
A
C
19
H
A
42
R
Ranger collected 159 rope bundles in the morning and 211 rope bundles in the afternoon, then split them equally among 5 expedition team. How many rope bundles did each get?S
There were 224 flashlights in all. 4 expedition team used 32 flashlights each. The other 6 expedition team shared the rest equally. How many flashlights did each of the other expedition team get?P
Ranger collected 9 canteens in the morning and 75 canteens in the afternoon, then split them equally among 4 expedition team. How many canteens did each get?L
Ranger filled 2 boxes with 5 canteens each, then found 9 more canteens. How many canteens are there in all?K
Ranger collected 55 rope bundles in the morning and 285 rope bundles in the afternoon, then split them equally among 4 expedition team. How many rope bundles did each get?B
Ranger filled 2 boxes with 9 maps each, then found 54 more maps. How many maps are there in all?Y
There were 300 flashlights in all. 3 expedition team used 30 flashlights each. The other 5 expedition team shared the rest equally. How many flashlights did each of the other expedition team get?I
0/7 letters found
Clue 5
Division facts (1-12) — the last clue
You divide the remaining trail clues equally among your team members.
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
16 ÷ 8 = ?
55 ÷ 5 = ?
18 ÷ 3 = ?
7 ÷ 7 = ?
10 ÷ 2 = ?
90 ÷ 10 = ?
63 ÷ 9 = ?
12 ÷ 3 = ?
90 ÷ 9 = ?
21 ÷ 7 = ?
96 ÷ 8 = ?
Step 2 — cross out the sentence with each answer
1.The villain lit up the dark trail with a flashlight, then searched the dirt with a metal detector.
2.The villain vanished in a cloud of smoke bombs, then searched the dirt with a metal detector.
3.The villain vanished in a cloud of smoke bombs, then glided over the trees with a paraglider.
4.The villain checked the secret path with a compass, then chatted on a walkie talkie.
5.The villain lit up the dark trail with a flashlight, then chatted on a walkie talkie.
6.The villain vanished in a cloud of smoke bombs, then chatted on a walkie talkie.
7.The villain cleared the thick vines with a machete, then searched the dirt with a metal detector.
8.The villain swung across the river with a grappling hook, then glided over the trees with a paraglider.
9.The villain lit up the dark trail with a flashlight, then scouted the camp with binoculars.
10.The villain cleared the thick vines with a machete, then chatted on a walkie talkie.
11.The villain checked the secret path with a compass, then glided over the trees with a paraglider.
12.The villain checked the secret path with a compass, then searched the dirt with a metal detector.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Lost Idol of Mystery Island
Culprit: Pathfinder Pete (Grappling Hook · Paraglider · Left Handed · Spiky Black Hair · Allergic To Mud)
- Clue 1 (Multiplication facts (1-12)): "THE VILLAIN DOES NOT USE A CANTEEN"11 × 11 = 121 (T) · 5 × 1 = 5 (S) · 12 × 5 = 60 (I) · 7 × 4 = 28 (V) · 3 × 7 = 21 (C) · 6 × 11 = 66 (L) · 3 × 12 = 36 (D) · 3 × 4 = 12 (U) · 10 × 12 = 120 (E) · 8 × 1 = 8 (O) · 1 × 2 = 2 (N) · 10 × 7 = 70 (H) · 3 × 11 = 33 (A)
- Clue 2 (Addition): "THE VILLAIN LEFT A LEFT HAND PRINT ON THE TENT"1186 + 1663 = 2849 (T) · 1202 + 2146 = 3348 (H) · 4144 + 1912 = 6056 (F) · 2648 + 3813 = 6461 (R) · 6804 + 2990 = 9794 (O) · 1512 + 1954 = 3466 (E) · 1610 + 2073 = 3683 (A) · 2066 + 2903 = 4969 (L) · 3815 + 4934 = 8749 (D) · 3119 + 3805 = 6924 (V) · 1371 + 1196 = 2567 (N) · 1786 + 3491 = 5277 (P) · 5875 + 3570 = 9445 (I)
- Clue 3 (Word problems): "ALLERGIC TO MUD"There were 78 flashlights. 26 were used up. How many flashlights are left? = 52 (A) · Ranger lined up 10 rows of 8 canteens. How many canteens in all? = 80 (R) · Ranger lined up 5 rows of 7 maps. How many maps in all? = 35 (C) · Ranger found 42 rope bundles yesterday and 11 more today. How many rope bundles in all? = 53 (I) · There were 46 maps. 24 were used up. How many maps are left? = 22 (G) · Ranger found 10 flashlights yesterday and 15 more today. How many flashlights in all? = 25 (E) · Ranger lined up 2 rows of 4 flashlights. How many flashlights in all? = 8 (L)
- Clue 4 (Multi-step word problems): "SPIKY BLACK HAIR"Ranger collected 159 rope bundles in the morning and 211 rope bundles in the afternoon, then split them equally among 5 expedition team. How many rope bundles did each get? = 74 (S) · There were 224 flashlights in all. 4 expedition team used 32 flashlights each. The other 6 expedition team shared the rest equally. How many flashlights did each of the other expedition team get? = 16 (P) · Ranger collected 9 canteens in the morning and 75 canteens in the afternoon, then split them equally among 4 expedition team. How many canteens did each get? = 21 (L) · Ranger filled 2 boxes with 5 canteens each, then found 9 more canteens. How many canteens are there in all? = 19 (K) · Ranger collected 55 rope bundles in the morning and 285 rope bundles in the afternoon, then split them equally among 4 expedition team. How many rope bundles did each get? = 85 (B) · Ranger filled 2 boxes with 9 maps each, then found 54 more maps. How many maps are there in all? = 72 (Y) · There were 300 flashlights in all. 3 expedition team used 30 flashlights each. The other 5 expedition team shared the rest equally. How many flashlights did each of the other expedition team get? = 42 (I)
- Clue 5 (Division facts (1-12)): surviving statement (box 8) → Pathfinder Pete16 ÷ 8 = 2 · 55 ÷ 5 = 11 · 18 ÷ 3 = 6 · 7 ÷ 7 = 1 · 10 ÷ 2 = 5 · 90 ÷ 10 = 9 · 63 ÷ 9 = 7 · 12 ÷ 3 = 4 · 90 ÷ 9 = 10 · 21 ÷ 7 = 3 · 96 ÷ 8 = 12
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Multiplication, Addition, Word problems, Multi-step word problems, Division
- Reading level
- grades 3-4
- Theme
- The Lost Idol of Mystery Island — set in Jungle Camp Alpha
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects