🦕 DinosaursGrade 2Reading: grades 1-2AdditionSubtractionSkip countingPlace valueMissing addends
The Great Dino Egg Mystery
A glowing rare dinosaur egg went missing from the camp! Follow the clues around the dig site to catch the sneaky thief.
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 Buddy | Tool Used | Stance | Cap Color | Scared By |
|---|---|---|---|---|---|
| Piper Pebble | Stego | Dino Whistle | Left Handed | Tan Cap | Mud Splash |
| Penny Peat | Raptor | Magnifying Glass | Left Handed | Tan Cap | Mud Splash |
| Ivy Flint | Pterodactyl | Magnifying Glass | Left Handed | Red Cap | Mud Splash |
| Ruby Rock | T Rex | Digging Shovel | Left Handed | Blue Cap | Loud Noise |
| Tracker Tara | Pterodactyl | Bone Brush | Left Handed | Red Cap | Loud Noise |
| Gabe Gravel | Stego | Magnifying Glass | Right Handed | Blue Cap | Mud Splash |
| Bruno Boulder | Triceratops | Dino Whistle | Left Handed | Red Cap | Mud Splash |
| Leo Loam | Raptor | Rope Lasso | Left Handed | Tan Cap | Bright Flash |
| Ollie Ore | Pterodactyl | Dino Whistle | Left Handed | Blue Cap | Mud Splash |
| Jack Jasper | Triceratops | Digging Shovel | Right Handed | Red Cap | Loud Noise |
| Dr Bone | T Rex | Dino Whistle | Left Handed | Red Cap | Bright Flash |
| Nora Fossil | Triceratops | Digging Shovel | Right Handed | Tan Cap | Mud Splash |
| Daisy Dust | Raptor | Bone Brush | Right Handed | Red Cap | Mud Splash |
| Kira Quartz | Stego | Dino Whistle | Left Handed | Blue Cap | Bright Flash |
| Professor Digs | Triceratops | Rope Lasso | Left Handed | Blue Cap | Mud Splash |
| Amber Ash | Stego | Dino Whistle | Left Handed | Blue Cap | Mud Splash |
| Clay Cliff | Stego | Magnifying Glass | Left Handed | Tan Cap | Mud Splash |
| Dino Dan | T Rex | Digging Shovel | Right Handed | Red Cap | Bright Flash |
| Maya Mud | Raptor | Dino Whistle | Left Handed | Blue Cap | Mud Splash |
| Ranger Rex | T Rex | Digging Shovel | Right Handed | Red Cap | Mud Splash |
| Holly Hill | Stego | Digging Shovel | Left Handed | Blue Cap | Mud Splash |
Clue 1
Addition
Ranger Sam found dino footprints in two trails. Count them together to read the clue.
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
40
59
37
52
59
35
47
27
T
68
40
61
59
24
26
58
59
37
52
58
T
68
42
37
59
35
21
58
25
59
49
35
37
37
58
39 + 29 =T
17 + 23 =H
11 + 10 =R
17 + 20 =S
16 + 19 =A
20 + 29 =L
24 + 34 =O
12 + 12 =F
19 + 8 =Y
10 + 16 =D
17 + 35 =N
21 + 38 =E
34 + 27 =I
14 + 33 =K
14 + 11 =P
28 + 14 =U
0/16 letters found
Clue 2
Subtraction
Professor Fossil had fresh dino eggs, but some went missing. Subtract to find the clue.
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
32
55
50
13
82
28
28
20
82
60
11
63
50
26
T
32
55
50
82
73
28
50
38
T
32
55
20
60
26
T
32
75
31
73
41
50
66
66
48 - 16 =T
18 - 5 =V
72 - 6 =G
91 - 31 =N
66 - 28 =F
105 - 23 =I
56 - 28 =L
67 - 17 =E
101 - 28 =R
88 - 13 =O
36 - 5 =P
69 - 6 =S
79 - 38 =Y
75 - 20 =H
55 - 35 =A
30 - 4 =D
18 - 7 =U
0/17 letters found
Clue 3
Skip counting
Tracker Tina counted fossil teeth by twos along the dirt path to open the clue box.
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
22
15
120
30
10
28
28
55
10
110
70
55
110
55
42
55
16
100
70
27
35
55
35
33
9
80
12
28
55
80
15
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, ___, 24, 26T
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, ___, 40, 45M
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, ___, 130, 140E
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, ___, 30, 32L
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, ___, 75, 80R
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, ___, 110, 120F
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130N
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65A
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, ___, 90, 100S
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39U
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33O
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, ___, 18, 21H
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14I
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20Y
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, ___, 45, 48W
Skip-count by 10s. Fill the blank: 10, 20, ___, 40, 50V
Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15D
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, ___, 14, 16P
0/18 letters found
Clue 4
Place value
The camp computer shows tens and ones for the track length. Break it down to get the clue.
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
75
95
15
27
37
36
A
75
82
62
A
75
52
21
33
61
82
82
37
21
30
37
A
75
33
54
49
37
21
35
30
61
30
37
52
54
What number has 7 tens and 5 ones?A
What number has 3 tens and 0 ones?N
What number has 9 tens and 5 ones?B
What number has 3 tens and 7 ones?E
What number has 5 tens and 2 ones?S
What number has 6 tens and 1 one?O
What number has 3 tens and 6 ones?C
What number has 4 tens and 9 ones?H
What number has 3 tens and 5 ones?I
What number has 2 tens and 1 one?D
What number has 1 ten and 5 ones?L
What number has 8 tens and 2 ones?P
What number has 6 tens and 2 ones?W
What number has 3 tens and 3 ones?R
What number has 2 tens and 7 ones?U
What number has 5 tens and 4 ones?T
0/16 letters found
Clue 5
Missing addends — the last clue
We need ten total brushes for the dig site. Solve for the missing amount to see the clue.
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
7 + ___ = 11
8 + ___ = 19
6 + ___ = 15
7 + ___ = 12
8 + ___ = 10
7 + ___ = 15
5 + ___ = 17
1 + ___ = 8
4 + ___ = 5
10 + ___ = 16
7 + ___ = 10
Step 2 — cross out the sentence with each answer
1.The villain marched with a heavy stego, then swung a long rope lasso.
2.The villain rode on a hungry t rex, then blew a noisy dino whistle.
3.The villain flew with a pterodactyl, then swung a long rope lasso.
4.The villain marched with a heavy stego, then blew a noisy dino whistle.
5.The villain rode on a hungry t rex, then dusted dirt with a bone brush.
6.The villain marched with a heavy stego, then searched with a magnifying glass.
7.The villain charged with a triceratops, then searched with a magnifying glass.
8.The villain rode on a hungry t rex, then searched with a magnifying glass.
9.The villain snuck with a fast raptor, then blew a noisy dino whistle.
10.The villain marched with a heavy stego, then dug dirt with a digging shovel.
11.The villain flew with a pterodactyl, then blew a noisy dino whistle.
12.The villain charged with a triceratops, then swung a long rope lasso.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Great Dino Egg Mystery
Culprit: Holly Hill (Stego · Digging Shovel · Left Handed · Blue Cap · Mud Splash)
- Clue 1 (Addition): "THE SNEAKY THIEF DOES NOT USE A ROPE LASSO"39 + 29 = 68 (T) · 17 + 23 = 40 (H) · 11 + 10 = 21 (R) · 17 + 20 = 37 (S) · 16 + 19 = 35 (A) · 20 + 29 = 49 (L) · 24 + 34 = 58 (O) · 12 + 12 = 24 (F) · 19 + 8 = 27 (Y) · 10 + 16 = 26 (D) · 17 + 35 = 52 (N) · 21 + 38 = 59 (E) · 34 + 27 = 61 (I) · 14 + 33 = 47 (K) · 14 + 11 = 25 (P) · 28 + 14 = 42 (U)
- Clue 2 (Subtraction): "THE VILLAIN USED THEIR LEFT HAND TO PRY EGG"48 - 16 = 32 (T) · 18 - 5 = 13 (V) · 72 - 6 = 66 (G) · 91 - 31 = 60 (N) · 66 - 28 = 38 (F) · 105 - 23 = 82 (I) · 56 - 28 = 28 (L) · 67 - 17 = 50 (E) · 101 - 28 = 73 (R) · 88 - 13 = 75 (O) · 36 - 5 = 31 (P) · 69 - 6 = 63 (S) · 79 - 38 = 41 (Y) · 75 - 20 = 55 (H) · 55 - 35 = 20 (A) · 30 - 4 = 26 (D) · 18 - 7 = 11 (U)
- Clue 3 (Skip counting): "THE VILLAIN RAN AWAY FROM A MUD SPLASH"Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, ___, 24, 26 = 22 (T) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, ___, 40, 45 = 35 (M) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, ___, 130, 140 = 120 (E) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, ___, 30, 32 = 28 (L) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, ___, 75, 80 = 70 (R) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, ___, 110, 120 = 100 (F) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130 = 110 (N) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65 = 55 (A) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, ___, 90, 100 = 80 (S) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39 = 33 (U) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33 = 27 (O) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, ___, 18, 21 = 15 (H) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14 = 10 (I) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20 = 16 (Y) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, ___, 45, 48 = 42 (W) · Skip-count by 10s. Fill the blank: 10, 20, ___, 40, 50 = 30 (V) · Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15 = 9 (D) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, ___, 14, 16 = 12 (P)
- Clue 4 (Place value): "A BLUE CAP WAS DROPPED NEAR THE DINO NEST"What number has 7 tens and 5 ones? = 75 (A) · What number has 3 tens and 0 ones? = 30 (N) · What number has 9 tens and 5 ones? = 95 (B) · What number has 3 tens and 7 ones? = 37 (E) · What number has 5 tens and 2 ones? = 52 (S) · What number has 6 tens and 1 one? = 61 (O) · What number has 3 tens and 6 ones? = 36 (C) · What number has 4 tens and 9 ones? = 49 (H) · What number has 3 tens and 5 ones? = 35 (I) · What number has 2 tens and 1 one? = 21 (D) · What number has 1 ten and 5 ones? = 15 (L) · What number has 8 tens and 2 ones? = 82 (P) · What number has 6 tens and 2 ones? = 62 (W) · What number has 3 tens and 3 ones? = 33 (R) · What number has 2 tens and 7 ones? = 27 (U) · What number has 5 tens and 4 ones? = 54 (T)
- Clue 5 (Missing addends): surviving statement (box 10) → Holly Hill7 + ___ = 11 = 4 · 8 + ___ = 19 = 11 · 6 + ___ = 15 = 9 · 7 + ___ = 12 = 5 · 8 + ___ = 10 = 2 · 7 + ___ = 15 = 8 · 5 + ___ = 17 = 12 · 1 + ___ = 8 = 7 · 4 + ___ = 5 = 1 · 10 + ___ = 16 = 6 · 7 + ___ = 10 = 3
About this mystery
- Grade level
- Grade 2 math
- Math topics
- Addition, Subtraction, Skip counting, Place value, Missing addends
- Reading level
- grades 1-2
- Theme
- The Great Dino Egg Mystery — set in Prehistoric Valley Dig Site
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects