Grade 4Reading: grades 3-4MultiplicationRoundingAdditionSubtractionDivision
Mystery of the Lost Explorer Map
Someone snuck into Chief Ranger Rick's cabin and snatched the secret gold map! Use your deduction skills to uncover who took it.
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 | Main Tool | Gadget | Handedness | Bandana Color | Fear |
|---|---|---|---|---|---|
| Mia | Rope Launcher | Carabiner Clip | Right Handed | Green Bandana | Fear Of Bees |
| Sam | Golden Compass | Pocket Whistle | Right Handed | Red Bandana | Fear Of Dark |
| Caleb | Golden Compass | Camp Flashlight | Right Handed | Green Bandana | Fear Of Mud |
| Finn | Brass Spyglass | Pocket Whistle | Right Handed | Red Bandana | Fear Of Bees |
| Maya | Signal Flare | Walkie Talkie | Right Handed | Green Bandana | Fear Of Dark |
| Jack | Rope Launcher | Camp Flashlight | Left Handed | Blue Bandana | Fear Of Mud |
| Ruby | Grappling Hook | Pocket Whistle | Right Handed | Blue Bandana | Fear Of Mud |
| Emma | Grappling Hook | Camp Flashlight | Left Handed | Red Bandana | Fear Of Bees |
| Ella | Signal Flare | Pocket Whistle | Right Handed | Green Bandana | Fear Of Dark |
| Lily | Signal Flare | Walkie Talkie | Right Handed | Blue Bandana | Fear Of Mud |
| Toby | Golden Compass | Pocket Whistle | Left Handed | Red Bandana | Fear Of Mud |
| Ava | Signal Flare | Carabiner Clip | Right Handed | Blue Bandana | Fear Of Mud |
| Ivy | Signal Flare | Pocket Whistle | Right Handed | Green Bandana | Fear Of Mud |
| Chloe | Golden Compass | Pocket Whistle | Right Handed | Red Bandana | Fear Of Mud |
| Zoe | Signal Flare | Camp Flashlight | Right Handed | Blue Bandana | Fear Of Dark |
| Owen | Rope Launcher | Smoke Bomb | Right Handed | Blue Bandana | Fear Of Mud |
| Eli | Rope Launcher | Camp Flashlight | Right Handed | Blue Bandana | Fear Of Mud |
| Noah | Grappling Hook | Carabiner Clip | Right Handed | Red Bandana | Fear Of Dark |
| Mason | Brass Spyglass | Carabiner Clip | Right Handed | Blue Bandana | Fear Of Mud |
| Nora | Golden Compass | Smoke Bomb | Right Handed | Green Bandana | Fear Of Mud |
| Grace | Grappling Hook | Smoke Bomb | Left Handed | Red Bandana | Fear Of Mud |
Clue 1
Multiplication facts (1-12)
You find supply crates stacked in neat equal rows near the cabin.
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
22
36
35
30
121
121
88
30
6
11
64
36
144
6
64
T
110
132
144
36
88
9
88
56
88
18
30
6
36
56
9
121
30
90
10 × 11 =T
9 × 4 =E
6 × 3 =B
11 × 2 =H
8 × 7 =R
12 × 12 =S
5 × 6 =I
8 × 8 =O
5 × 7 =V
11 × 8 =A
11 × 12 =U
2 × 3 =N
11 × 1 =D
10 × 9 =P
11 × 11 =L
9 × 1 =C
0/16 letters found
Clue 2
Rounding
A blurry trail camera screen shows a rounded code number.
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
5000
1100
2000
700
50
9000
9000
3000
50
110
2300
900
50
T
5000
2000
300
2300
50
T
5000
1100
T
5000
1100
2000
50
900
900
50
3700
1100
T
5000
1100
3000
110
200
Round 5,232 to the nearest thousandT
Round 47 to the nearest tenI
Round 2,620 to the nearest thousandA
Round 904 to the nearest hundredR
Round 1,116 to the nearest hundredH
Round 112 to the nearest tenN
Round 2,313 to the nearest hundredW
Round 157 to the nearest hundredD
Round 2,134 to the nearest thousandE
Round 260 to the nearest hundredS
Round 9,462 to the nearest thousandL
Round 3,659 to the nearest hundredG
Round 723 to the nearest hundredV
0/13 letters found
Clue 3
Addition
You add up all the lost canteen totals from the two camp cabins.
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
9022
2684
6712
6840
8131
5740
5740
5441
8131
4231
5441
6840
8873
8131
2082
6712
2082
5441
8675
8131
2661
2358
7707
2082
2082
9513
7553
7707
2082
2082
5740
6712
5093 + 3929 =T
1510 + 848 =M
2534 + 3206 =L
4158 + 3973 =I
3982 + 2858 =V
2794 + 5881 =B
3052 + 4501 =P
684 + 1398 =D
1744 + 2487 =N
2496 + 2945 =A
5191 + 3682 =O
4194 + 3513 =U
894 + 1790 =H
3354 + 6159 =Y
1672 + 989 =G
2594 + 4118 =E
0/16 letters found
Clue 4
Subtraction
You compare total muddy boots to find how many clean pairs remain.
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
8254
7488
7399
A
8254
3758
3758
5424
4343
6011
6974
8326
5424
6011
A
8254
7399
4343
A
8254
7399
A
8254
4281
A
8254
7488
6974
5424
7941
2318
6011
5424
5642
3744
7399
4343
13022 - 4768 =A
4849 - 568 =W
13304 - 4978 =U
9247 - 4904 =D
8594 - 4850 =I
5402 - 1644 =G
7494 - 1483 =B
8292 - 1318 =L
9792 - 4150 =H
12037 - 4549 =S
8090 - 691 =N
7446 - 2022 =E
8279 - 338 =F
3350 - 1032 =T
0/14 letters found
Clue 5
Division facts (1-12) — the last clue
You split the found trail clues evenly into small detective bags.
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
40 ÷ 10 = ?
56 ÷ 7 = ?
10 ÷ 10 = ?
108 ÷ 9 = ?
22 ÷ 11 = ?
10 ÷ 2 = ?
3 ÷ 1 = ?
80 ÷ 8 = ?
30 ÷ 5 = ?
132 ÷ 12 = ?
72 ÷ 8 = ?
Step 2 — cross out the sentence with each answer
1.The villain lit up the night sky with a signal flare, then chattered over a walkie talkie.
2.The villain spied on the campsite with a brass spyglass, then vanished behind a smoke bomb.
3.The villain lit up the night sky with a signal flare, then vanished behind a smoke bomb.
4.The villain scaled the stone cliff with a grappling hook, then blew a loud pocket whistle.
5.The villain lit up the night sky with a signal flare, then clipped onto the wire with a carabiner clip.
6.The villain lit up the night sky with a signal flare, then shone a bright camp flashlight.
7.The villain zipped across the canyon with a rope launcher, then vanished behind a smoke bomb.
8.The villain zipped across the canyon with a rope launcher, then shone a bright camp flashlight.
9.The villain spied on the campsite with a brass spyglass, then blew a loud pocket whistle.
10.The villain spied on the campsite with a brass spyglass, then shone a bright camp flashlight.
11.The villain scaled the stone cliff with a grappling hook, then shone a bright camp flashlight.
12.The villain unlocked the old chest with a golden compass, then vanished behind a smoke bomb.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — Mystery of the Lost Explorer Map
Culprit: Owen (Rope Launcher · Smoke Bomb · Right Handed · Blue Bandana · Fear Of Mud)
- Clue 1 (Multiplication facts (1-12)): "THE VILLAIN DOES NOT USE A CARABINER CLIP"10 × 11 = 110 (T) · 9 × 4 = 36 (E) · 6 × 3 = 18 (B) · 11 × 2 = 22 (H) · 8 × 7 = 56 (R) · 12 × 12 = 144 (S) · 5 × 6 = 30 (I) · 8 × 8 = 64 (O) · 5 × 7 = 35 (V) · 11 × 8 = 88 (A) · 11 × 12 = 132 (U) · 2 × 3 = 6 (N) · 11 × 1 = 11 (D) · 10 × 9 = 90 (P) · 11 × 11 = 121 (L) · 9 × 1 = 9 (C)
- Clue 2 (Rounding): "THE VILLAIN WRITES WITH THEIR RIGHT HAND"Round 5,232 to the nearest thousand = 5000 (T) · Round 47 to the nearest ten = 50 (I) · Round 2,620 to the nearest thousand = 3000 (A) · Round 904 to the nearest hundred = 900 (R) · Round 1,116 to the nearest hundred = 1100 (H) · Round 112 to the nearest ten = 110 (N) · Round 2,313 to the nearest hundred = 2300 (W) · Round 157 to the nearest hundred = 200 (D) · Round 2,134 to the nearest thousand = 2000 (E) · Round 260 to the nearest hundred = 300 (S) · Round 9,462 to the nearest thousand = 9000 (L) · Round 3,659 to the nearest hundred = 3700 (G) · Round 723 to the nearest hundred = 700 (V)
- Clue 3 (Addition): "THE VILLAIN AVOIDED A BIG MUDDY PUDDLE"5093 + 3929 = 9022 (T) · 1510 + 848 = 2358 (M) · 2534 + 3206 = 5740 (L) · 4158 + 3973 = 8131 (I) · 3982 + 2858 = 6840 (V) · 2794 + 5881 = 8675 (B) · 3052 + 4501 = 7553 (P) · 684 + 1398 = 2082 (D) · 1744 + 2487 = 4231 (N) · 2496 + 2945 = 5441 (A) · 5191 + 3682 = 8873 (O) · 4194 + 3513 = 7707 (U) · 894 + 1790 = 2684 (H) · 3354 + 6159 = 9513 (Y) · 1672 + 989 = 2661 (G) · 2594 + 4118 = 6712 (E)
- Clue 4 (Subtraction): "A SNAGGED BLUE BANDANA WAS LEFT BEHIND"13022 - 4768 = 8254 (A) · 4849 - 568 = 4281 (W) · 13304 - 4978 = 8326 (U) · 9247 - 4904 = 4343 (D) · 8594 - 4850 = 3744 (I) · 5402 - 1644 = 3758 (G) · 7494 - 1483 = 6011 (B) · 8292 - 1318 = 6974 (L) · 9792 - 4150 = 5642 (H) · 12037 - 4549 = 7488 (S) · 8090 - 691 = 7399 (N) · 7446 - 2022 = 5424 (E) · 8279 - 338 = 7941 (F) · 3350 - 1032 = 2318 (T)
- Clue 5 (Division facts (1-12)): surviving statement (box 7) → Owen40 ÷ 10 = 4 · 56 ÷ 7 = 8 · 10 ÷ 10 = 1 · 108 ÷ 9 = 12 · 22 ÷ 11 = 2 · 10 ÷ 2 = 5 · 3 ÷ 1 = 3 · 80 ÷ 8 = 10 · 30 ÷ 5 = 6 · 132 ÷ 12 = 11 · 72 ÷ 8 = 9
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Multiplication, Rounding, Addition, Subtraction, Division
- Reading level
- grades 3-4
- Theme
- Mystery of the Lost Explorer Map — set in Misty Island Adventure Camp
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects