🦕 Dinosaurs, MinecraftGrade 2Reading: grades 3-4Place valueAdditionSubtractionSkip countingMissing addends
The Great Diamond Dino Egg Caper
A sneaky thief sneaked into the Cretaceous Craft Museum and swapped the glowing Diamond Dino Egg for a plain lump of cobblestone! Work through the math clues to figure out who took it.
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 Companion | Crafted Tool | Mining Hand | Helmet Type | Bait Snack |
|---|---|---|---|---|---|
| Finn | Pterodactyl | Redstone Drill | Right-handed | Leather Cap | Golden Apples |
| Nora | T-Rex | TNT Launcher | Right-handed | Iron Helmet | Cooked Salmon |
| Ella | Pterodactyl | Diamond Pick | Left-handed | Iron Helmet | Cooked Salmon |
| Max | Stegosaurus | Diamond Pick | Right-handed | Leather Cap | Cooked Salmon |
| Jax | Raptor | Diamond Pick | Right-handed | Leather Cap | Golden Apples |
| Emma | T-Rex | Redstone Drill | Right-handed | Leather Cap | Golden Apples |
| Alex | T-Rex | Netherite Sword | Left-handed | Leather Cap | Cooked Salmon |
| Ivy | T-Rex | Netherite Sword | Left-handed | Leather Cap | Sweet Berries |
| Chloe | Pterodactyl | Redstone Drill | Right-handed | Leather Cap | Cooked Salmon |
| Cole | T-Rex | Redstone Drill | Left-handed | Diamond Helmet | Golden Apples |
| Ruby | Raptor | Diamond Pick | Right-handed | Leather Cap | Cooked Salmon |
| Luke | Triceratops | Redstone Drill | Right-handed | Diamond Helmet | Cooked Salmon |
| Steve | T-Rex | Redstone Drill | Left-handed | Diamond Helmet | Sweet Berries |
| Zoe | T-Rex | Netherite Sword | Right-handed | Iron Helmet | Golden Apples |
| Kai | Triceratops | Netherite Sword | Right-handed | Diamond Helmet | Sweet Berries |
| Noah | Pterodactyl | Golden Axe | Left-handed | Iron Helmet | Cooked Salmon |
| Ava | T-Rex | Redstone Drill | Right-handed | Diamond Helmet | Sweet Berries |
| Mia | Triceratops | Netherite Sword | Right-handed | Leather Cap | Cooked Salmon |
| Owen | Raptor | TNT Launcher | Right-handed | Leather Cap | Cooked Salmon |
| Leo | Pterodactyl | Diamond Pick | Right-handed | Iron Helmet | Sweet Berries |
| Mason | Stegosaurus | Diamond Pick | Right-handed | Iron Helmet | Cooked Salmon |
Clue 1
Place value
Check the place values on the supply chest lock to see which tool was NOT used.
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
50
79
96
15
43
15
55
96
87
T
50
25
51
96
15
91
51
T
50
43
15
96
41
T
50
91
T
50
22
41
43
91
87
79
96
73
What number has 5 tens and 0 ones?T
What number has 2 tens and 5 ones?D
What number has 9 tens and 1 one?N
What number has 5 tens and 1 one?O
What number has 7 tens and 3 ones?R
What number has 5 tens and 5 ones?P
What number has 4 tens and 3 ones?U
What number has 7 tens and 9 ones?H
What number has 4 tens and 1 one?A
What number has 9 tens and 6 ones?E
What number has 8 tens and 7 ones?C
What number has 1 ten and 5 ones?S
What number has 2 tens and 2 ones?L
0/13 letters found
Clue 2
Addition
Add up all the fossil blocks near the cave entrance to reveal the villain's mining hand.
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
30
76
29
70
75
65
80
98
35
26
88
90
T
30
57
57
76
65
34
50
26
88
25
76
T
30
76
50
90
84
29
84
25
26
88
35
15 + 15 =T
20 + 14 =W
23 + 27 =A
50 + 38 =I
23 + 47 =B
26 + 54 =C
61 + 29 =N
38 + 27 =O
30 + 68 =K
8 + 21 =E
40 + 17 =S
17 + 8 =G
23 + 12 =P
18 + 8 =R
35 + 40 =L
27 + 57 =D
54 + 22 =H
0/17 letters found
Clue 3
Subtraction
Subtract the missing emeralds from the chest inventory to discover the villain's favorite snack.
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
73
84
28
36
26
38
75
84
38
38
40
28
18
S
73
87
35
47
38
36
88
87
S
73
35
28
75
26
76
28
43
59
36
18
90 - 17 =S
120 - 32 =W
64 - 26 =O
108 - 21 =A
80 - 5 =F
48 - 12 =N
62 - 22 =K
44 - 18 =T
79 - 32 =M
104 - 28 =B
45 - 17 =E
84 - 25 =I
59 - 16 =H
92 - 8 =C
58 - 23 =L
50 - 32 =D
0/16 letters found
Clue 4
Skip counting
Skip count along the line of obsidian blocks to trace the dropped helmet evidence.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
L
100
33
130
65
70
33
42
24
130
20
25
50
40
33
42
27
18
33
42
33
27
45
130
14
14
33
140
22
45
40
30
27
70
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, ___, 110, 120L
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, ___, 60, 70I
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55N
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, ___, 35, 40U
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, ___, 16, 18G
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, ___, 80, 90H
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, ___, 27, 30C
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33S
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, ___, 21, 24W
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, ___, 45, 50B
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, ___, 140, 150A
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, ___, 22, 24P
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, ___, 150, 160D
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, ___, 24, 26O
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, ___, 30, 35F
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39E
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, ___, 70, 75T
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, ___, 45, 48R
0/18 letters found
Clue 5
Missing addends — the last clue
Find the missing addend of redstone torches to unlock the final piece of evidence.
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
8 + ___ = 19
2 + ___ = 5
10 + ___ = 19
10 + ___ = 18
1 + ___ = 6
2 + ___ = 3
3 + ___ = 15
5 + ___ = 15
6 + ___ = 12
9 + ___ = 16
4 + ___ = 6
Step 2 — cross out the sentence with each answer
1.The villain charged with a triceratops, then chopped with a golden axe.
2.The villain charged with a triceratops, then fired a tnt launcher.
3.The villain soared on a pterodactyl, then drilled with redstone.
4.The villain rode a fierce raptor, then swung a diamond pick.
5.The villain swung with a stegosaurus, then drilled with redstone.
6.The villain tamed a giant t-rex, then drilled with redstone.
7.The villain rode a fierce raptor, then brandished a netherite sword.
8.The villain tamed a giant t-rex, then fired a tnt launcher.
9.The villain charged with a triceratops, then brandished a netherite sword.
10.The villain soared on a pterodactyl, then chopped with a golden axe.
11.The villain swung with a stegosaurus, then swung a diamond pick.
12.The villain swung with a stegosaurus, then chopped with a golden axe.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Great Diamond Dino Egg Caper
Culprit: Ruby (Raptor · Diamond Pick · Right-handed · Leather Cap · Cooked Salmon)
- Clue 1 (Place value): "THE SUSPECT DOES NOT USE A TNT LAUNCHER"What number has 5 tens and 0 ones? = 50 (T) · What number has 2 tens and 5 ones? = 25 (D) · What number has 9 tens and 1 one? = 91 (N) · What number has 5 tens and 1 one? = 51 (O) · What number has 7 tens and 3 ones? = 73 (R) · What number has 5 tens and 5 ones? = 55 (P) · What number has 4 tens and 3 ones? = 43 (U) · What number has 7 tens and 9 ones? = 79 (H) · What number has 4 tens and 1 one? = 41 (A) · What number has 9 tens and 6 ones? = 96 (E) · What number has 8 tens and 7 ones? = 87 (C) · What number has 1 ten and 5 ones? = 15 (S) · What number has 2 tens and 2 ones? = 22 (L)
- Clue 2 (Addition): "THE BLOCK PRINTS SHOW A RIGHT HANDED GRIP"15 + 15 = 30 (T) · 20 + 14 = 34 (W) · 23 + 27 = 50 (A) · 50 + 38 = 88 (I) · 23 + 47 = 70 (B) · 26 + 54 = 80 (C) · 61 + 29 = 90 (N) · 38 + 27 = 65 (O) · 30 + 68 = 98 (K) · 8 + 21 = 29 (E) · 40 + 17 = 57 (S) · 17 + 8 = 25 (G) · 23 + 12 = 35 (P) · 18 + 8 = 26 (R) · 35 + 40 = 75 (L) · 27 + 57 = 84 (D) · 54 + 22 = 76 (H)
- Clue 3 (Subtraction): "SCENT OF COOKED SALMON WAS LEFT BEHIND"90 - 17 = 73 (S) · 120 - 32 = 88 (W) · 64 - 26 = 38 (O) · 108 - 21 = 87 (A) · 80 - 5 = 75 (F) · 48 - 12 = 36 (N) · 62 - 22 = 40 (K) · 44 - 18 = 26 (T) · 79 - 32 = 47 (M) · 104 - 28 = 76 (B) · 45 - 17 = 28 (E) · 84 - 25 = 59 (I) · 59 - 16 = 43 (H) · 92 - 8 = 84 (C) · 58 - 23 = 35 (L) · 50 - 32 = 18 (D)
- Clue 4 (Skip counting): "LEATHER CAP FIBERS WERE SNAGGED ON BUSH"Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, ___, 110, 120 = 100 (L) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, ___, 60, 70 = 50 (I) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55 = 45 (N) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, ___, 35, 40 = 30 (U) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, ___, 16, 18 = 14 (G) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, ___, 80, 90 = 70 (H) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, ___, 27, 30 = 24 (C) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33 = 27 (S) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, ___, 21, 24 = 18 (W) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, ___, 45, 50 = 40 (B) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, ___, 140, 150 = 130 (A) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, ___, 22, 24 = 20 (P) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, ___, 150, 160 = 140 (D) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, ___, 24, 26 = 22 (O) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, ___, 30, 35 = 25 (F) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39 = 33 (E) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, ___, 70, 75 = 65 (T) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, ___, 45, 48 = 42 (R)
- Clue 5 (Missing addends): surviving statement (box 4) → Ruby8 + ___ = 19 = 11 · 2 + ___ = 5 = 3 · 10 + ___ = 19 = 9 · 10 + ___ = 18 = 8 · 1 + ___ = 6 = 5 · 2 + ___ = 3 = 1 · 3 + ___ = 15 = 12 · 5 + ___ = 15 = 10 · 6 + ___ = 12 = 6 · 9 + ___ = 16 = 7 · 4 + ___ = 6 = 2
About this mystery
- Grade level
- Grade 2 math
- Math topics
- Place value, Addition, Subtraction, Skip counting, Missing addends
- Reading level
- grades 3-4
- Theme
- The Great Diamond Dino Egg Caper — set in Cretaceous Craft Biome
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects