🦕 DinosaursGrade 2Reading: grades 5-6Place valueAdditionSubtractionSkip countingMissing addends
The Cretaceous Canopy Heist
An emergency alarm has shattered the peace of the volcanic valley. Someone bypassed the heavy steel paddock gates, freed a juvenile spinosaurus, and stole the encrypted dinosaur DNA database. The Chief Paleobotanist was locked in the prehistoric greenhouse to slow down our response. We must examine the clues, analyze the footprint logs, and identify the Rogue Handler before they escape the island.
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 | Tech Tool | Dominant Hand | Hair Color | Vulnerability |
|---|---|---|---|---|---|
| William Buckland | Raptor Stealth | Laser Lasso | Left-handed | Obsidian black | High pitches |
| Luis Chiappe | Triceratops Shield | Thermal Visor | Left-handed | Rusty orange | High pitches |
| Paul Sereno | Raptor Stealth | Amber Scanner | Right-handed | Rusty orange | Flash flares |
| Robert Bakker | Raptor Stealth | Amber Scanner | Left-handed | Rusty orange | Flash flares |
| Jack Horner | Raptor Stealth | Amber Scanner | Right-handed | Obsidian black | Sticky sap |
| Patricia Vickers | T-Rex Roarer | Sonic Whistle | Right-handed | Rusty orange | High pitches |
| Richard Owen | Triceratops Shield | Amber Scanner | Left-handed | Rusty orange | High pitches |
| Mary Anning | Triceratops Shield | Thermal Visor | Right-handed | Obsidian black | High pitches |
| Tilly Edinger | Raptor Stealth | Shock Boots | Left-handed | Neon green | Sticky sap |
| John Ostrom | T-Rex Roarer | Thermal Visor | Left-handed | Neon green | Sticky sap |
| Robert Muldoon | T-Rex Roarer | Amber Scanner | Right-handed | Rusty orange | High pitches |
| Gideon Mantell | T-Rex Roarer | Shock Boots | Left-handed | Rusty orange | High pitches |
| Barnum Brown | T-Rex Roarer | Shock Boots | Right-handed | Rusty orange | Sticky sap |
| Charles Knight | Triceratops Shield | Amber Scanner | Right-handed | Obsidian black | Flash flares |
| Othniel Marsh | Raptor Stealth | Laser Lasso | Right-handed | Neon green | Flash flares |
| Ian Malcolm | T-Rex Roarer | Sonic Whistle | Left-handed | Rusty orange | Sticky sap |
| Roy Chapman | Ankylosaur Smasher | Sonic Whistle | Left-handed | Neon green | High pitches |
| Henry Osborn | Ankylosaur Smasher | Laser Lasso | Left-handed | Rusty orange | High pitches |
| Sue Hendrickson | Pterodactyl Glider | Laser Lasso | Right-handed | Obsidian black | Flash flares |
| Karen Chin | Pterodactyl Glider | Shock Boots | Right-handed | Rusty orange | Flash flares |
| Alan Grant | Ankylosaur Smasher | Amber Scanner | Left-handed | Rusty orange | High pitches |
Clue 1
Place value
We found a dropped GPS tracker near the Raptor paddock. Its digital screen is damaged, only showing specific digit values in the hundreds, tens, and ones places.
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
62
36
72
11
50
83
83
98
50
81
14
16
72
95
81
16
T
62
58
95
72
T
62
36
72
83
98
95
72
92
83
98
95
95
16
What number has 6 tens and 2 ones?T
What number has 1 ten and 1 one?V
What number has 9 tens and 2 ones?R
What number has 9 tens and 5 ones?S
What number has 7 tens and 2 ones?E
What number has 8 tens and 3 ones?L
What number has 9 tens and 8 ones?A
What number has 5 tens and 8 ones?U
What number has 3 tens and 6 ones?H
What number has 8 tens and 1 one?N
What number has 1 ten and 6 ones?O
What number has 5 tens and 0 ones?I
What number has 1 ten and 4 ones?D
0/13 letters found
Clue 2
Addition
A physical tally sheet was recovered from the control room. By adding up the escaped hatchlings from the nursery zones, we can decode the next step of our pursuit.
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
68
95
73
49
48
49
63
73
67
T
68
82
73
96
T
68
95
41
60
34
63
23
77
60
T
68
85
60
T
68
95
73
54
41
82
82
34 + 34 =T
37 + 48 =O
19 + 35 =W
38 + 22 =N
62 + 34 =F
16 + 18 =D
30 + 18 =U
50 + 27 =I
32 + 41 =E
39 + 24 =P
44 + 51 =H
13 + 10 =R
41 + 26 =C
57 + 25 =L
34 + 15 =S
20 + 21 =A
0/16 letters found
Clue 3
Subtraction
The volcanic steam valves were tampered with to hide the getaway. To figure out the override code, we must subtract the damaged pressure levels from the maximum safety limit.
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
26
40
32
30
56
11
44
32
16
30
58
14
11
32
78
67
T
26
40
58
11
40
81
58
T
26
16
40
32
78
42
56
44
14
78
42
48 - 22 =T
101 - 23 =D
76 - 18 =I
75 - 31 =U
49 - 19 =R
25 - 14 =G
71 - 4 =A
15 - 1 =N
42 - 2 =H
58 - 26 =E
95 - 39 =O
74 - 32 =S
55 - 39 =C
115 - 34 =P
0/14 letters found
Clue 4
Skip counting
We discovered a trail of fossilized tracks leading into the deep jungle canopy. The footprints are arranged in neat, repeating groups, and counting them helps us track the escape route.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
O
140
70
60
110
80
8
18
36
70
60
110
35
18
16
8
70
8
18
110
60
80
80
8
35
O
140
110
36
120
8
30
8
110
39
8
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, ___, 150, 160O
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, ___, 70, 80A
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, ___, 39, 42T
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, ___, 40, 45D
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130N
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, ___, 20, 22S
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, ___, 80, 90R
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, ___, 90, 100G
Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12E
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, ___, 42, 45C
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, ___, 130, 140H
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20W
Skip-count by 10s. Fill the blank: 10, 20, ___, 40, 50F
0/13 letters found
Clue 5
Missing addends — the last clue
The heavy security gates require a precise weight balance of supplies to open. We must calculate the missing value to unlock the final surveillance file.
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
10 + ___ = 15
2 + ___ = 9
4 + ___ = 12
8 + ___ = 19
2 + ___ = 4
1 + ___ = 5
3 + ___ = 15
7 + ___ = 13
8 + ___ = 17
2 + ___ = 5
6 + ___ = 7
Step 2 — cross out the sentence with each answer
1.The villain activates raptor stealth camouflage, then tracks movement with a thermal visor.
2.The villain leaps off a cliff with a pterodactyl glider, then short-circuits security with shock boots.
3.The villain swings a triceratops shield to block lasers, then snags a running specimen with a laser lasso.
4.The villain unleashes a deafening t-rex roarer sonic blast, then tracks movement with a thermal visor.
5.The villain smashes through steel gates with an ankylosaur club, then scans the brush with an amber scanner.
6.The villain leaps off a cliff with a pterodactyl glider, then tracks movement with a thermal visor.
7.The villain unleashes a deafening t-rex roarer sonic blast, then short-circuits security with shock boots.
8.The villain swings a triceratops shield to block lasers, then scans the brush with an amber scanner.
9.The villain activates raptor stealth camouflage, then short-circuits security with shock boots.
10.The villain swings a triceratops shield to block lasers, then tracks movement with a thermal visor.
11.The villain unleashes a deafening t-rex roarer sonic blast, then snags a running specimen with a laser lasso.
12.The villain swings a triceratops shield to block lasers, then signals raptors with a sonic whistle.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Cretaceous Canopy Heist
Culprit: Luis Chiappe (Triceratops Shield · Thermal Visor · Left-handed · Rusty orange · High pitches)
- Clue 1 (Place value): "THE VILLAIN DOES NOT USE THE LASER LASSO"What number has 6 tens and 2 ones? = 62 (T) · What number has 1 ten and 1 one? = 11 (V) · What number has 9 tens and 2 ones? = 92 (R) · What number has 9 tens and 5 ones? = 95 (S) · What number has 7 tens and 2 ones? = 72 (E) · What number has 8 tens and 3 ones? = 83 (L) · What number has 9 tens and 8 ones? = 98 (A) · What number has 5 tens and 8 ones? = 58 (U) · What number has 3 tens and 6 ones? = 36 (H) · What number has 8 tens and 1 one? = 81 (N) · What number has 1 ten and 6 ones? = 16 (O) · What number has 5 tens and 0 ones? = 50 (I) · What number has 1 ten and 4 ones? = 14 (D)
- Clue 2 (Addition): "THE SUSPECT LEFT HANDPRINT ON THE WALL"34 + 34 = 68 (T) · 37 + 48 = 85 (O) · 19 + 35 = 54 (W) · 38 + 22 = 60 (N) · 62 + 34 = 96 (F) · 16 + 18 = 34 (D) · 30 + 18 = 48 (U) · 50 + 27 = 77 (I) · 32 + 41 = 73 (E) · 39 + 24 = 63 (P) · 44 + 51 = 95 (H) · 13 + 10 = 23 (R) · 41 + 26 = 67 (C) · 57 + 25 = 82 (L) · 34 + 15 = 49 (S) · 20 + 21 = 41 (A)
- Clue 3 (Subtraction): "THE ROGUE CRINGED AT HIGH PITCHED SOUNDS"48 - 22 = 26 (T) · 101 - 23 = 78 (D) · 76 - 18 = 58 (I) · 75 - 31 = 44 (U) · 49 - 19 = 30 (R) · 25 - 14 = 11 (G) · 71 - 4 = 67 (A) · 15 - 1 = 14 (N) · 42 - 2 = 40 (H) · 58 - 26 = 32 (E) · 95 - 39 = 56 (O) · 74 - 32 = 42 (S) · 55 - 39 = 16 (C) · 115 - 34 = 81 (P)
- Clue 4 (Skip counting): "ORANGE STRANDS WERE SNAGGED ON THE FENCE"Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, ___, 150, 160 = 140 (O) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, ___, 70, 80 = 60 (A) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, ___, 39, 42 = 36 (T) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, ___, 40, 45 = 35 (D) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130 = 110 (N) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, ___, 20, 22 = 18 (S) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, ___, 80, 90 = 70 (R) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, ___, 90, 100 = 80 (G) · Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12 = 8 (E) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, ___, 42, 45 = 39 (C) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, ___, 130, 140 = 120 (H) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20 = 16 (W) · Skip-count by 10s. Fill the blank: 10, 20, ___, 40, 50 = 30 (F)
- Clue 5 (Missing addends): surviving statement (box 10) → Luis Chiappe10 + ___ = 15 = 5 · 2 + ___ = 9 = 7 · 4 + ___ = 12 = 8 · 8 + ___ = 19 = 11 · 2 + ___ = 4 = 2 · 1 + ___ = 5 = 4 · 3 + ___ = 15 = 12 · 7 + ___ = 13 = 6 · 8 + ___ = 17 = 9 · 2 + ___ = 5 = 3 · 6 + ___ = 7 = 1
About this mystery
- Grade level
- Grade 2 math
- Math topics
- Place value, Addition, Subtraction, Skip counting, Missing addends
- Reading level
- grades 5-6
- Theme
- The Cretaceous Canopy Heist — set in Cretaceous Canopy Research Station
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects