🦕 DinosaursGrade 6Reading: grades 5-6AdditionMultiplicationSubtractionRoundingDivision
The Great Fossil Park Mystery
A rare glowing amber fossil vanished from the central display crate right before the grand opening of Cretaceous Canopy Reserve! The suspect left behind tracks, broken vines, and strange evidence across the dig site. Help Detective Rex analyze the field notes to catch the culprit before the park gates open!
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 | Dino Exo Suit | Gadget Tool | Stride Style | Crest Color | Distraction Item |
|---|---|---|---|---|---|
| Ranger Robert Bakker | TRex Exo Suit | Sonic Whistle | Left Footed Stride | Crimson Crest | Loud Airhorn |
| Ranger Angela Milner | Pterodactyl Glider | Flare Gun | Right Footed Stride | Amber Crest | Sizzling Steak |
| Ranger Roy Chapman | Raptor Speed Armor | Flare Gun | Right Footed Stride | Emerald Crest | Sizzling Steak |
| Dr Xu Xing | TRex Exo Suit | Flare Gun | Left Footed Stride | Crimson Crest | Bright Flashlight |
| Dr Karen Chin | Stego Bone Shield | Flare Gun | Right Footed Stride | Amber Crest | Sizzling Steak |
| Dr Paul Sereno | Raptor Speed Armor | Thermal Scanner | Right Footed Stride | Emerald Crest | Loud Airhorn |
| Ranger Kenneth Carpenter | TRex Exo Suit | Grappling Vine | Left Footed Stride | Amber Crest | Loud Airhorn |
| Dr Lindsay Zanno | TRex Exo Suit | Thermal Scanner | Left Footed Stride | Amber Crest | Bright Flashlight |
| Ranger Jack Horner | Trike Horn Helmet | Grappling Vine | Right Footed Stride | Crimson Crest | Sizzling Steak |
| Ranger Phil Currie | Stego Bone Shield | Flare Gun | Right Footed Stride | Crimson Crest | Loud Airhorn |
| Dr Patricia Vickers | TRex Exo Suit | Grappling Vine | Left Footed Stride | Crimson Crest | Loud Airhorn |
| Prof Richard Owen | Pterodactyl Glider | Thermal Scanner | Right Footed Stride | Amber Crest | Bright Flashlight |
| Ranger Luis Chiappe | Stego Bone Shield | Thermal Scanner | Right Footed Stride | Emerald Crest | Sizzling Steak |
| Dr Rodolfo Coria | TRex Exo Suit | Thermal Scanner | Right Footed Stride | Emerald Crest | Bright Flashlight |
| Dr Ellie Sattler | TRex Exo Suit | Sonic Whistle | Right Footed Stride | Amber Crest | Sizzling Steak |
| Ranger Jim Kirkland | Stego Bone Shield | Grappling Vine | Right Footed Stride | Amber Crest | Sizzling Steak |
| Ranger Susan Hendrickson | Pterodactyl Glider | Grappling Vine | Right Footed Stride | Amber Crest | Loud Airhorn |
| Dr Barnum Brown | TRex Exo Suit | Thermal Scanner | Left Footed Stride | Amber Crest | Sizzling Steak |
| Dr Philip Senter | Stego Bone Shield | Grappling Vine | Right Footed Stride | Crimson Crest | Loud Airhorn |
| Dr Lawrence Lambe | Pterodactyl Glider | Grappling Vine | Right Footed Stride | Crimson Crest | Loud Airhorn |
| Ranger Dong Zhiming | Raptor Speed Armor | Tar Launcher | Right Footed Stride | Amber Crest | Sizzling Steak |
Clue 1
Addition
To calculate total footprint depth, Ranger Mary added up the measurements from all three mud tracks.
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
2868
4323
5619
6795
4725
6795
5172
5619
3905
T
2868
4719
6770
5619
6795
3500
6770
T
2868
4725
6795
5619
7587
T
2868
7587
4843
5001
7587
4725
3500
3905
4323
5619
4843
1814 + 1054 =T
2283 + 1622 =C
2262 + 2061 =H
4341 + 2454 =S
4130 + 2640 =O
1996 + 2847 =R
1924 + 2795 =D
2504 + 3115 =E
2416 + 1084 =N
3118 + 2054 =P
3192 + 1533 =U
1677 + 3324 =L
4633 + 2954 =A
0/13 letters found
Clue 2
Multiplication facts (1-12)
Analyzing the claw scratches along the fence required multiplying the number of posts by the scratch count per post.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
M
120
18
11
80
35
96
54
3
99
99
16
7
132
96
16
50
96
1
77
35
40
48
16
80
121
7
7
80
50
11
99
80
35
40
11
50
10 × 12 =M
1 × 11 =D
7 × 11 =Y
3 × 6 =U
12 × 8 =A
5 × 7 =R
8 × 5 =I
11 × 9 =S
9 × 6 =C
8 × 10 =T
12 × 11 =W
3 × 1 =K
1 × 1 =V
11 × 11 =F
10 × 5 =E
4 × 12 =G
4 × 4 =H
1 × 7 =O
0/18 letters found
Clue 3
Subtraction
To find out how many supply crates were taken, Dr Ellie subtracted the remaining boxes from the starting 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
7595
1200
5117
7470
4641
5117
2307
2861
2023
2307
7470
7470
T
7595
2490
1350
1350
5117
4323
7388
4276
2307
7470
6691
4659
4659
8573
6691
4641
2978
7470
T
7595
5117
2307
2861
8523 - 928 =T
6682 - 3821 =K
7631 - 3355 =Y
7811 - 2694 =E
3548 - 1241 =A
2540 - 50 =O
4409 - 3059 =P
5499 - 4299 =H
2180 - 157 =W
3232 - 254 =G
12300 - 4830 =S
8019 - 631 =B
8343 - 3702 =N
4794 - 471 =D
13016 - 4443 =L
9935 - 3244 =I
7383 - 2724 =Z
0/17 letters found
Clue 4
Rounding
The digital motion sensor radar only reports distances rounded to the nearest ten meters.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
S
500
90
3000
370
50
S
500
1700
3000
370
3700
130
S
500
90
700
7000
30
S
500
1700
9000
3000
2000
700
3700
700
2000
230
30
9000
90
9000
30
S
500
50
Round 478 to the nearest hundredS
Round 1,731 to the nearest hundredF
Round 9,387 to the nearest thousandR
Round 374 to the nearest tenU
Round 3,404 to the nearest thousandO
Round 129 to the nearest tenD
Round 704 to the nearest hundredA
Round 7,364 to the nearest thousandL
Round 231 to the nearest tenB
Round 87 to the nearest tenC
Round 48 to the nearest tenT
Round 1,996 to the nearest thousandM
Round 33 to the nearest tenE
Round 3,714 to the nearest hundredN
0/14 letters found
Clue 5
Division facts (1-12) — the last clue
To divide the search grid evenly among the rescue teams, the head ranger split the map into equal sectors.
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
60 ÷ 10 = ?
11 ÷ 11 = ?
90 ÷ 9 = ?
72 ÷ 8 = ?
16 ÷ 8 = ?
72 ÷ 9 = ?
144 ÷ 12 = ?
21 ÷ 3 = ?
10 ÷ 2 = ?
22 ÷ 2 = ?
36 ÷ 12 = ?
Step 2 — cross out the sentence with each answer
1.The villain shielded against the rockslide, then swung from a grappling vine.
2.The villain stomped through the mud pit, then scanned with thermal sights.
3.The villain soared over the canyon fence, then blasted a sticky tar launcher.
4.The villain shielded against the rockslide, then fired a bright flare gun.
5.The villain charged through the timber gate, then swung from a grappling vine.
6.The villain stomped through the mud pit, then blew a loud sonic whistle.
7.The villain soared over the canyon fence, then scanned with thermal sights.
8.The villain dashed past the raptor pen, then swung from a grappling vine.
9.The villain soared over the canyon fence, then swung from a grappling vine.
10.The villain soared over the canyon fence, then fired a bright flare gun.
11.The villain stomped through the mud pit, then swung from a grappling vine.
12.The villain charged through the timber gate, then blasted a sticky tar launcher.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Great Fossil Park Mystery
Culprit: Dr Karen Chin (Stego Bone Shield · Flare Gun · Right Footed Stride · Amber Crest · Sizzling Steak)
- Clue 1 (Addition): "THE SUSPECT DOES NOT USE A TAR LAUNCHER"1814 + 1054 = 2868 (T) · 2283 + 1622 = 3905 (C) · 2262 + 2061 = 4323 (H) · 4341 + 2454 = 6795 (S) · 4130 + 2640 = 6770 (O) · 1996 + 2847 = 4843 (R) · 1924 + 2795 = 4719 (D) · 2504 + 3115 = 5619 (E) · 2416 + 1084 = 3500 (N) · 3118 + 2054 = 5172 (P) · 3192 + 1533 = 4725 (U) · 1677 + 3324 = 5001 (L) · 4633 + 2954 = 7587 (A)
- Clue 2 (Multiplication facts (1-12)): "MUD TRACKS SHOW A HEAVY RIGHT FOOTED STRIDE"10 × 12 = 120 (M) · 1 × 11 = 11 (D) · 7 × 11 = 77 (Y) · 3 × 6 = 18 (U) · 12 × 8 = 96 (A) · 5 × 7 = 35 (R) · 8 × 5 = 40 (I) · 11 × 9 = 99 (S) · 9 × 6 = 54 (C) · 8 × 10 = 80 (T) · 12 × 11 = 132 (W) · 3 × 1 = 3 (K) · 1 × 1 = 1 (V) · 11 × 11 = 121 (F) · 10 × 5 = 50 (E) · 4 × 12 = 48 (G) · 4 × 4 = 16 (H) · 1 × 7 = 7 (O)
- Clue 3 (Subtraction): "THE SNEAK WAS STOPPED BY A SIZZLING STEAK"8523 - 928 = 7595 (T) · 6682 - 3821 = 2861 (K) · 7631 - 3355 = 4276 (Y) · 7811 - 2694 = 5117 (E) · 3548 - 1241 = 2307 (A) · 2540 - 50 = 2490 (O) · 4409 - 3059 = 1350 (P) · 5499 - 4299 = 1200 (H) · 2180 - 157 = 2023 (W) · 3232 - 254 = 2978 (G) · 12300 - 4830 = 7470 (S) · 8019 - 631 = 7388 (B) · 8343 - 3702 = 4641 (N) · 4794 - 471 = 4323 (D) · 13016 - 4443 = 8573 (L) · 9935 - 3244 = 6691 (I) · 7383 - 2724 = 4659 (Z)
- Clue 4 (Rounding): "SCOUTS FOUND SCALES FROM AN AMBER CREST"Round 478 to the nearest hundred = 500 (S) · Round 1,731 to the nearest hundred = 1700 (F) · Round 9,387 to the nearest thousand = 9000 (R) · Round 374 to the nearest ten = 370 (U) · Round 3,404 to the nearest thousand = 3000 (O) · Round 129 to the nearest ten = 130 (D) · Round 704 to the nearest hundred = 700 (A) · Round 7,364 to the nearest thousand = 7000 (L) · Round 231 to the nearest ten = 230 (B) · Round 87 to the nearest ten = 90 (C) · Round 48 to the nearest ten = 50 (T) · Round 1,996 to the nearest thousand = 2000 (M) · Round 33 to the nearest ten = 30 (E) · Round 3,714 to the nearest hundred = 3700 (N)
- Clue 5 (Division facts (1-12)): surviving statement (box 4) → Dr Karen Chin60 ÷ 10 = 6 · 11 ÷ 11 = 1 · 90 ÷ 9 = 10 · 72 ÷ 8 = 9 · 16 ÷ 8 = 2 · 72 ÷ 9 = 8 · 144 ÷ 12 = 12 · 21 ÷ 3 = 7 · 10 ÷ 2 = 5 · 22 ÷ 2 = 11 · 36 ÷ 12 = 3
About this mystery
- Grade level
- Grade 6 math
- Math topics
- Addition, Multiplication, Subtraction, Rounding, Division
- Reading level
- grades 5-6
- Theme
- The Great Fossil Park Mystery — set in Cretaceous Canopy Reserve
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects