🦕 DinosaursGrade 4Reading: grades 3-4MultiplicationSkip countingFractions of a numberRoundingDivision
The Great Fossil Caper
A rare glowing T-rex tooth has disappeared from the camp vault! The Dino Dig Squad needs your help analyzing clues to catch the robber before they escape the canyon.
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 | Dig Tool | Dino Gear | Accessory | Hat Style | Distraction |
|---|---|---|---|---|---|
| Explorer Ian | Roar Amplifier | Pterodactyl Glider | Handheld Compass | Green Sun Visor | Loud Whistle |
| Tracker Zia | Track Finder | Stego Shield | Field Goggles | Red Safari Cap | Loud Whistle |
| Ranger Tim | Bone Scanner | T-Rex Grabber | Field Goggles | Green Sun Visor | Loud Whistle |
| Scientist Paul | Plasma Chisel | T-Rex Grabber | Field Goggles | Green Sun Visor | Flashlight Beam |
| Ranger Sue | Bone Scanner | T-Rex Grabber | Handheld Compass | Red Safari Cap | Flashlight Beam |
| Professor Roy | Bone Scanner | Tricera Helmet | Handheld Compass | Green Sun Visor | Loud Whistle |
| Scientist Sereno | Amber Laser | T-Rex Grabber | Handheld Compass | Green Sun Visor | Loud Whistle |
| Scout Alan | Amber Laser | Tricera Helmet | Field Goggles | Green Sun Visor | Squeaky Toy |
| Ranger Owen | Bone Scanner | Pterodactyl Glider | Field Goggles | Blue Feather Fedora | Flashlight Beam |
| Ranger Maisie | Bone Scanner | Stego Shield | Handheld Compass | Blue Feather Fedora | Squeaky Toy |
| Tracker Claire | Track Finder | Tricera Helmet | Handheld Compass | Green Sun Visor | Squeaky Toy |
| Explorer Wu | Amber Laser | Stego Shield | Handheld Compass | Blue Feather Fedora | Loud Whistle |
| Ranger Ellie | Plasma Chisel | Stego Shield | Handheld Compass | Red Safari Cap | Loud Whistle |
| Dr Barnum | Bone Scanner | Pterodactyl Glider | Field Goggles | Blue Feather Fedora | Squeaky Toy |
| Ranger Mary | Bone Scanner | Stego Shield | Handheld Compass | Red Safari Cap | Flashlight Beam |
| Professor Franklin | Plasma Chisel | Tricera Helmet | Handheld Compass | Green Sun Visor | Squeaky Toy |
| Scout Lex | Track Finder | Raptor Boots | Field Goggles | Blue Feather Fedora | Loud Whistle |
| Dr Norell | Bone Scanner | Pterodactyl Glider | Handheld Compass | Green Sun Visor | Loud Whistle |
| Dr Gideon | Track Finder | Stego Shield | Handheld Compass | Red Safari Cap | Loud Whistle |
| Tracker Jack | Track Finder | Stego Shield | Handheld Compass | Green Sun Visor | Squeaky Toy |
| Professor Horner | Bone Scanner | Raptor Boots | Handheld Compass | Green Sun Visor | Loud Whistle |
Clue 1
Multiplication facts (1-12)
We found equal rows of fossil supply crates packed inside the camp shed.
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
7
56
77
44
11
36
36
54
11
4
70
8
77
35
4
8
T
7
40
77
54
16
16
54
60
T
7
8
16
21
8
8
T
7
35
1 × 7 =T
1 × 11 =I
12 × 5 =P
11 × 7 =E
7 × 3 =B
5 × 8 =W
7 × 10 =D
6 × 6 =L
1 × 4 =N
5 × 7 =S
1 × 8 =O
7 × 8 =H
6 × 9 =A
11 × 4 =V
2 × 8 =R
0/15 letters found
Clue 2
Skip counting
Tracks trail along the canyon mud in steady repeated sets.
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
39
28
55
26
55
35
28
45
T
21
120
10
90
35
35
28
120
25
39
25
80
120
39
28
8
120
45
90
14
35
25
55
55
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, ___, 24, 27T
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, ___, 28, 30U
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65S
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14R
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, ___, 30, 35A
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, ___, 30, 32E
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, ___, 42, 45H
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, ___, 90, 100N
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, ___, 16, 18M
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55C
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, ___, 40, 45P
Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12L
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, ___, 130, 140D
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110O
0/14 letters found
Clue 3
Fractions of a number
Only a fractional portion of the bone sample tray was taken.
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
36
26
38
6
22
25
3
15
39
4
26
2
20
A
36
22
2
4
3
2
5
15
26
26
A
36
15
40
30
2
4
30
2
A
36
4
2/5 of 90 =A
4/8 of 4 =E
3/6 of 80 =N
1/2 of 30 =I
1/4 of 120 =R
5/6 of 6 =V
2/4 of 6 =H
2/3 of 6 =T
6/10 of 65 =S
2/8 of 88 =D
2/10 of 100 =M
3/6 of 76 =O
5/10 of 52 =L
5/8 of 40 =W
1/10 of 60 =U
0/15 letters found
Clue 4
Rounding
The dig site radar readout only displays rounded numbers.
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
200
3700
2300
170
7000
2300
300
4300
1700
T
200
3700
50
2300
230
130
9000
30
1100
1100
2300
130
300
700
9000
2300
2300
7000
170
20
7000
90
50
170
30
9000
Round 228 to the nearest hundredT
Round 46 to the nearest tenI
Round 1,667 to the nearest hundredY
Round 34 to the nearest tenO
Round 2,261 to the nearest hundredE
Round 8,912 to the nearest thousandR
Round 132 to the nearest tenD
Round 3,742 to the nearest hundredH
Round 4,326 to the nearest hundredK
Round 90 to the nearest tenV
Round 24 to the nearest tenU
Round 6,518 to the nearest thousandN
Round 253 to the nearest hundredA
Round 1,147 to the nearest hundredP
Round 726 to the nearest hundredG
Round 232 to the nearest tenF
Round 173 to the nearest tenS
0/17 letters found
Clue 5
Division facts (1-12) — the last clue
The team divided the fossil fragments evenly among sample 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
96 ÷ 8 = ?
32 ÷ 4 = ?
6 ÷ 2 = ?
63 ÷ 9 = ?
110 ÷ 11 = ?
5 ÷ 1 = ?
5 ÷ 5 = ?
81 ÷ 9 = ?
16 ÷ 4 = ?
88 ÷ 8 = ?
30 ÷ 5 = ?
Step 2 — cross out the sentence with each answer
1.The villain amplified a dino roar, then zipped away in raptor boots.
2.The villain scanned the fossil dig site, then bashed the wooden gate.
3.The villain scanned the fossil dig site, then glided over the ravine.
4.The villain chiseled out the glowing amber, then glided over the ravine.
5.The villain amplified a dino roar, then bashed the wooden gate.
6.The villain scanned the fossil dig site, then blocked the path with a stego shield.
7.The villain tracked footprints down the canyon, then zipped away in raptor boots.
8.The villain zapped the stone wall, then snatched the skull with a t rex grabber.
9.The villain tracked footprints down the canyon, then bashed the wooden gate.
10.The villain zapped the stone wall, then blocked the path with a stego shield.
11.The villain tracked footprints down the canyon, then glided over the ravine.
12.The villain amplified a dino roar, then glided over the ravine.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Great Fossil Caper
Culprit: Professor Roy (Bone Scanner · Tricera Helmet · Handheld Compass · Green Sun Visor · Loud Whistle)
- Clue 1 (Multiplication facts (1-12)): "THE VILLAIN DOES NOT WEAR RAPTOR BOOTS"1 × 7 = 7 (T) · 1 × 11 = 11 (I) · 12 × 5 = 60 (P) · 11 × 7 = 77 (E) · 7 × 3 = 21 (B) · 5 × 8 = 40 (W) · 7 × 10 = 70 (D) · 6 × 6 = 36 (L) · 1 × 4 = 4 (N) · 5 × 7 = 35 (S) · 1 × 8 = 8 (O) · 7 × 8 = 56 (H) · 6 × 9 = 54 (A) · 11 × 4 = 44 (V) · 2 × 8 = 16 (R)
- Clue 2 (Skip counting): "THE SUSPECT DROPPED A HANDHELD COMPASS"Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, ___, 24, 27 = 21 (T) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, ___, 28, 30 = 26 (U) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65 = 55 (S) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14 = 10 (R) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, ___, 30, 35 = 25 (A) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, ___, 30, 32 = 28 (E) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, ___, 42, 45 = 39 (H) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, ___, 90, 100 = 80 (N) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, ___, 16, 18 = 14 (M) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55 = 45 (C) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, ___, 40, 45 = 35 (P) · Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12 = 8 (L) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, ___, 130, 140 = 120 (D) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110 = 90 (O)
- Clue 3 (Fractions of a number): "A LOUD WHISTLE MADE THE VILLAIN RETREAT"2/5 of 90 = 36 (A) · 4/8 of 4 = 2 (E) · 3/6 of 80 = 40 (N) · 1/2 of 30 = 15 (I) · 1/4 of 120 = 30 (R) · 5/6 of 6 = 5 (V) · 2/4 of 6 = 3 (H) · 2/3 of 6 = 4 (T) · 6/10 of 65 = 39 (S) · 2/8 of 88 = 22 (D) · 2/10 of 100 = 20 (M) · 3/6 of 76 = 38 (O) · 5/10 of 52 = 26 (L) · 5/8 of 40 = 25 (W) · 1/10 of 60 = 6 (U)
- Clue 4 (Rounding): "THE SNEAKY THIEF DROPPED A GREEN SUN VISOR"Round 228 to the nearest hundred = 200 (T) · Round 46 to the nearest ten = 50 (I) · Round 1,667 to the nearest hundred = 1700 (Y) · Round 34 to the nearest ten = 30 (O) · Round 2,261 to the nearest hundred = 2300 (E) · Round 8,912 to the nearest thousand = 9000 (R) · Round 132 to the nearest ten = 130 (D) · Round 3,742 to the nearest hundred = 3700 (H) · Round 4,326 to the nearest hundred = 4300 (K) · Round 90 to the nearest ten = 90 (V) · Round 24 to the nearest ten = 20 (U) · Round 6,518 to the nearest thousand = 7000 (N) · Round 253 to the nearest hundred = 300 (A) · Round 1,147 to the nearest hundred = 1100 (P) · Round 726 to the nearest hundred = 700 (G) · Round 232 to the nearest ten = 230 (F) · Round 173 to the nearest ten = 170 (S)
- Clue 5 (Division facts (1-12)): surviving statement (box 2) → Professor Roy96 ÷ 8 = 12 · 32 ÷ 4 = 8 · 6 ÷ 2 = 3 · 63 ÷ 9 = 7 · 110 ÷ 11 = 10 · 5 ÷ 1 = 5 · 5 ÷ 5 = 1 · 81 ÷ 9 = 9 · 16 ÷ 4 = 4 · 88 ÷ 8 = 11 · 30 ÷ 5 = 6
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Multiplication, Skip counting, Fractions of a number, Rounding, Division
- Reading level
- grades 3-4
- Theme
- The Great Fossil Caper — set in Dinosaur Valley Dig Site
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects