🦕 DinosaursGrade 4Reading: grades 3-4RoundingMultiplicationAdditionSubtractionDivision
The Great Raptor Ridge Heist
A sneaky thief snuck into the Dino Valley camp and swiped a glowing T-Rex egg fossil! It is up to you to decode the clues, track down the thief, and save the discovery.
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 Tool | Accessory | Head Style | Fear Factor |
|---|---|---|---|---|---|
| Expert Nora | Fossil Drill | Mud Sprayer | Solar Goggles | Wild Curls | Bright Flashlights |
| Driver Rex | Trap Net | Rope Cannon | Solar Goggles | Wild Curls | Bright Flashlights |
| Tracker Maya | Radar Scanner | Mud Sprayer | Solar Goggles | Safari Hat | Squeaky Boots |
| Pilot Claire | Fossil Drill | Rope Cannon | Solar Goggles | Safari Hat | Bright Flashlights |
| Guide Mason | Fossil Drill | Rock Hammer | Compass Watch | Safari Hat | Loud Whistles |
| Chief Mateo | Fossil Drill | Amber Torch | Compass Watch | Wild Curls | Loud Whistles |
| Climber Tess | Tracking Drone | Rope Cannon | Compass Watch | Wild Curls | Squeaky Boots |
| Scout Owen | Tracking Drone | Bone Brush | Compass Watch | Wild Curls | Squeaky Boots |
| Geologist Sara | Fossil Drill | Mud Sprayer | Solar Goggles | Wild Curls | Squeaky Boots |
| Doc Sam | Trap Net | Amber Torch | Compass Watch | Safari Hat | Loud Whistles |
| Ranger Chloe | Radar Scanner | Rock Hammer | Compass Watch | Wild Curls | Squeaky Boots |
| Guard Bruno | Tracking Drone | Bone Brush | Compass Watch | Safari Hat | Squeaky Boots |
| Hunter Zack | Trap Net | Bone Brush | Compass Watch | Wild Curls | Squeaky Boots |
| Trainee Leo | Roar Megaphone | Bone Brush | Compass Watch | Wild Curls | Loud Whistles |
| Scout Nina | Radar Scanner | Mud Sprayer | Compass Watch | Wild Curls | Bright Flashlights |
| Dig Lead Ian | Roar Megaphone | Mud Sprayer | Solar Goggles | Red Cap | Loud Whistles |
| Dr Henry | Roar Megaphone | Rock Hammer | Solar Goggles | Wild Curls | Squeaky Boots |
| Dr Grant | Radar Scanner | Bone Brush | Compass Watch | Wild Curls | Squeaky Boots |
| Professor Alan | Radar Scanner | Bone Brush | Solar Goggles | Wild Curls | Loud Whistles |
| Rookie Toby | Fossil Drill | Bone Brush | Compass Watch | Safari Hat | Bright Flashlights |
| Mapper Kim | Roar Megaphone | Rope Cannon | Compass Watch | Safari Hat | Loud Whistles |
Clue 1
Rounding
The campsite scanner rounds all bone counts to the nearest ten to keep quick totals.
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
90
300
50
170
30
1700
1700
500
30
4300
3700
2900
50
370
4300
2900
T
90
290
370
50
500
7000
2900
430
50
20
500
4300
4300
2900
4300
Round 87 to the nearest tenT
Round 171 to the nearest tenV
Round 2,896 to the nearest hundredO
Round 456 to the nearest hundredA
Round 1,740 to the nearest hundredL
Round 267 to the nearest hundredH
Round 288 to the nearest tenU
Round 26 to the nearest tenI
Round 3,673 to the nearest hundredD
Round 47 to the nearest tenE
Round 21 to the nearest tenC
Round 6,621 to the nearest thousandR
Round 4,314 to the nearest hundredN
Round 433 to the nearest tenP
Round 368 to the nearest tenS
0/15 letters found
Clue 2
Multiplication facts (1-12)
We check the supply crates arranged in neat equal rows inside the main tent.
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
81
28
21
70
11
70
90
21
35
T
81
54
21
50
64
70
50
35
7
27
90
50
70
70
54
50
T
81
35
28
9 × 9 =T
11 × 1 =U
7 × 1 =O
7 × 5 =C
7 × 4 =H
8 × 8 =R
7 × 10 =S
9 × 3 =M
9 × 10 =P
5 × 10 =A
3 × 7 =E
6 × 9 =W
0/12 letters found
Clue 3
Addition
Our team gathers all discovered fossil fragments from the dig pits into one total.
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
5475
7286
5336
2542
8238
5336
6367
3086
6722
7946
8238
2542
2227
6722
9348
9254
2542
2023
7946
5336
6367
3086
7180
9294
9348
9348
T
5475
2542
2936 + 2539 =T
3664 + 4574 =N
4330 + 2392 =R
1027 + 996 =Q
1444 + 783 =F
4948 + 4346 =B
3758 + 4188 =U
4997 + 2289 =H
1117 + 1425 =S
3293 + 3887 =Y
3976 + 2391 =A
5299 + 4049 =O
1874 + 1212 =K
3565 + 1771 =E
5424 + 3830 =M
0/15 letters found
Clue 4
Subtraction
We compare the total tracks found to the prints swept clean by the desert wind.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
F
4980
4565
5137
4442
6991
2981
5753
6993
8753
2981
4442
6991
7254
4442
5753
4565
4704
8612
5389
7254
7088
6991
6946
5137
8753
7088
5753
9022 - 4042 =F
8627 - 1634 =T
11097 - 4151 =C
10362 - 4609 =S
7947 - 4966 =A
11345 - 4354 =D
8682 - 1428 =I
8050 - 2913 =U
4944 - 240 =M
7951 - 2562 =W
10196 - 3108 =L
8956 - 344 =E
8518 - 4076 =N
8991 - 238 =R
6154 - 1589 =O
0/15 letters found
Clue 5
Division facts (1-12) — the last clue
The rangers divide the extra canteen rations equally among all patrol guards.
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
63 ÷ 9 = ?
8 ÷ 1 = ?
6 ÷ 1 = ?
14 ÷ 7 = ?
24 ÷ 2 = ?
33 ÷ 11 = ?
50 ÷ 5 = ?
30 ÷ 6 = ?
44 ÷ 4 = ?
4 ÷ 1 = ?
108 ÷ 12 = ?
Step 2 — cross out the sentence with each answer
1.The villain launched a heavy rope mesh, then brushed away fossil dust.
2.The villain blared a noisy stegosaurus cry, then chipped away at rock.
3.The villain scanned for glowing eggs, then lit up the dark cavern.
4.The villain launched a heavy rope mesh, then lit up the dark cavern.
5.The villain flew a buzzing scout drone, then lit up the dark cavern.
6.The villain scanned for glowing eggs, then chipped away at rock.
7.The villain scanned for glowing eggs, then brushed away fossil dust.
8.The villain flew a buzzing scout drone, then brushed away fossil dust.
9.The villain scanned for glowing eggs, then sprayed slick brown mud.
10.The villain scanned for glowing eggs, then swung across the canyon.
11.The villain launched a heavy rope mesh, then swung across the canyon.
12.The villain blared a noisy stegosaurus cry, then brushed away fossil dust.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Great Raptor Ridge Heist
Culprit: Hunter Zack (Trap Net · Bone Brush · Compass Watch · Wild Curls · Squeaky Boots)
- Clue 1 (Rounding): "THE VILLAIN DOES NOT USE A ROPE CANNON"Round 87 to the nearest ten = 90 (T) · Round 171 to the nearest ten = 170 (V) · Round 2,896 to the nearest hundred = 2900 (O) · Round 456 to the nearest hundred = 500 (A) · Round 1,740 to the nearest hundred = 1700 (L) · Round 267 to the nearest hundred = 300 (H) · Round 288 to the nearest ten = 290 (U) · Round 26 to the nearest ten = 30 (I) · Round 3,673 to the nearest hundred = 3700 (D) · Round 47 to the nearest ten = 50 (E) · Round 21 to the nearest ten = 20 (C) · Round 6,621 to the nearest thousand = 7000 (R) · Round 4,314 to the nearest hundred = 4300 (N) · Round 433 to the nearest ten = 430 (P) · Round 368 to the nearest ten = 370 (S)
- Clue 2 (Multiplication facts (1-12)): "THE SUSPECT WEARS A COMPASS WATCH"9 × 9 = 81 (T) · 11 × 1 = 11 (U) · 7 × 1 = 7 (O) · 7 × 5 = 35 (C) · 7 × 4 = 28 (H) · 8 × 8 = 64 (R) · 7 × 10 = 70 (S) · 9 × 3 = 27 (M) · 9 × 10 = 90 (P) · 5 × 10 = 50 (A) · 3 × 7 = 21 (E) · 6 × 9 = 54 (W)
- Clue 3 (Addition): "THE SNEAK RUNS FROM SQUEAKY BOOTS"2936 + 2539 = 5475 (T) · 3664 + 4574 = 8238 (N) · 4330 + 2392 = 6722 (R) · 1027 + 996 = 2023 (Q) · 1444 + 783 = 2227 (F) · 4948 + 4346 = 9294 (B) · 3758 + 4188 = 7946 (U) · 4997 + 2289 = 7286 (H) · 1117 + 1425 = 2542 (S) · 3293 + 3887 = 7180 (Y) · 3976 + 2391 = 6367 (A) · 5299 + 4049 = 9348 (O) · 1874 + 1212 = 3086 (K) · 3565 + 1771 = 5336 (E) · 5424 + 3830 = 9254 (M)
- Clue 4 (Subtraction): "FOUND A STRAND IN SOME WILD CURLS"9022 - 4042 = 4980 (F) · 8627 - 1634 = 6993 (T) · 11097 - 4151 = 6946 (C) · 10362 - 4609 = 5753 (S) · 7947 - 4966 = 2981 (A) · 11345 - 4354 = 6991 (D) · 8682 - 1428 = 7254 (I) · 8050 - 2913 = 5137 (U) · 4944 - 240 = 4704 (M) · 7951 - 2562 = 5389 (W) · 10196 - 3108 = 7088 (L) · 8956 - 344 = 8612 (E) · 8518 - 4076 = 4442 (N) · 8991 - 238 = 8753 (R) · 6154 - 1589 = 4565 (O)
- Clue 5 (Division facts (1-12)): surviving statement (box 1) → Hunter Zack63 ÷ 9 = 7 · 8 ÷ 1 = 8 · 6 ÷ 1 = 6 · 14 ÷ 7 = 2 · 24 ÷ 2 = 12 · 33 ÷ 11 = 3 · 50 ÷ 5 = 10 · 30 ÷ 6 = 5 · 44 ÷ 4 = 11 · 4 ÷ 1 = 4 · 108 ÷ 12 = 9
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Rounding, Multiplication, Addition, Subtraction, Division
- Reading level
- grades 3-4
- Theme
- The Great Raptor Ridge Heist — set in Dino Valley Research Camp
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects