🦕 DinosaursGrade 4Reading: grades 3-4RoundingAdditionSubtractionMultiplicationDivision
The Case of the Snatched Egg Keeper
At dawn the Egg Keeper went missing from Thunder Ridge, and a trail of muddy dino tracks led straight past the nests. Only one of the dinosaurs at the dig is the Bone Bandit. Use the clues, ranger, and crack the case.
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 Kind | Special Trick | Crest | Scale Color | Weak Spot |
|---|---|---|---|---|---|
| Fern | Stegosaurus | Super Sniff | Frilled | Blue | Ticklish Tail |
| Ziggy | Pteranodon | Mud Splash | Frilled | Brown | Ticklish Tail |
| Bolt | Tyrannosaurus | Night Vision | Plain | Green | Ticklish Tail |
| Bronto | Triceratops | Night Vision | Frilled | Brown | Sore Tooth |
| Tilly | Tyrannosaurus | Super Sniff | Plain | Blue | Ticklish Tail |
| Dottie | Velociraptor | Night Vision | Plain | Green | Sore Tooth |
| Dax | Triceratops | Mud Splash | Plain | Green | Sore Tooth |
| Vela | Triceratops | Mud Splash | Frilled | Green | Sore Tooth |
| Nessa | Velociraptor | Mud Splash | Plain | Brown | Sore Tooth |
| Ridge | Stegosaurus | Night Vision | Frilled | Blue | Itchy Feet |
| Chomp | Tyrannosaurus | Mud Splash | Plain | Green | Ticklish Tail |
| Clawdia | Pteranodon | Mud Splash | Frilled | Green | Ticklish Tail |
| Mossy | Pteranodon | Super Sniff | Plain | Green | Ticklish Tail |
| Petra | Velociraptor | Roar Blast | Plain | Green | Sore Tooth |
| Gizmo | Stegosaurus | Roar Blast | Plain | Green | Itchy Feet |
| Spike | Pteranodon | Super Sniff | Plain | Green | Itchy Feet |
| Pippa | Pteranodon | Burrow Dig | Frilled | Brown | Ticklish Tail |
| Terra | Velociraptor | Burrow Dig | Plain | Green | Sore Tooth |
| Sandy | Stegosaurus | Super Sniff | Frilled | Green | Ticklish Tail |
| Stomper | Velociraptor | Night Vision | Plain | Green | Itchy Feet |
| Trixie | Triceratops | Roar Blast | Plain | Green | Sore Tooth |
Clue 1
Rounding
The big radar at camp only shows footprint sizes rounded to the nearest ten. Round each muddy track to spot the Bone Bandit's heavy steps.
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
140000
3100000
2800
200000
310000
20
20
2000
310000
300000
14000
2000
300000
300000
30
T
140000
300
70
500
500
30
70000
500000
310000
2800000
Round 141,473 to the nearest ten thousandT
Round 2,844 to the nearest hundredE
Round 19 to the nearest tenL
Round 301 to the nearest hundredB
Round 13,536 to the nearest thousandC
Round 29 to the nearest tenO
Round 1,896 to the nearest thousandA
Round 305,292 to the nearest ten thousandI
Round 2,769,358 to the nearest hundred thousandG
Round 487,359 to the nearest hundred thousandD
Round 179,554 to the nearest hundred thousandV
Round 3,074,684 to the nearest hundred thousandH
Round 319,886 to the nearest hundred thousandN
Round 68,258 to the nearest ten thousandW
Round 525 to the nearest hundredR
Round 66 to the nearest tenU
0/16 letters found
Clue 2
Addition
The thief dropped loose bones in two crates by the nests. Add up every bone to learn one fact about the bandit.
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
2060
2292
6740
8539
9596
7872
4543
4543
4543
A
2060
2292
A
2060
6598
4876
A
2060
6740
9596
2065
7872
A
2060
6547
1273 + 787 =A
2371 + 5501 =E
3084 + 1459 =S
1123 + 1169 =W
4288 + 4251 =T
4130 + 2468 =P
4331 + 2409 =I
3855 + 2692 =D
4335 + 5261 =N
740 + 1325 =H
1690 + 3186 =L
0/11 letters found
Clue 3
Subtraction
Eggs are missing from the Keeper's nest. Subtract what is left from what should be there to uncover the next 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
2847
6052
8730
6117
1505
1782
5862
6117
7856
1782
4643
4643
6117
5862
4273
7158
4273
4756
4756
8730
5862
4140
4273
8730
8730
4273
4643
6029 - 3182 =A
6428 - 4646 =C
10639 - 4587 =L
5511 - 4006 =D
5318 - 562 =S
5092 - 819 =T
8631 - 4491 =E
6829 - 2186 =H
9301 - 3439 =R
7363 - 1246 =U
12365 - 4509 =N
11834 - 4676 =I
10082 - 1352 =O
0/13 letters found
Clue 4
Multiplication facts (1-12)
The nests sit in neat rows across the dig. Multiply the rows by the nests in each one to crack this 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
54
121
22
5
5
7
14
15
A
54
48
5
48
A
54
30
4
30
20
44
5
20
22
A
54
15
25
14
6 × 9 =A
2 × 11 =R
5 × 6 =Y
4 × 5 =T
2 × 7 =S
11 × 4 =H
1 × 5 =E
3 × 5 =C
6 × 8 =L
7 × 1 =N
1 × 4 =B
11 × 11 =G
5 × 5 =K
0/13 letters found
Clue 5
Division facts (1-12) — the last clue
Share the leftover dino snacks evenly among the rangers on watch. The even split points you to the last 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
40 ÷ 4 = ?
3 ÷ 3 = ?
28 ÷ 7 = ?
45 ÷ 5 = ?
132 ÷ 12 = ?
5 ÷ 1 = ?
96 ÷ 8 = ?
6 ÷ 2 = ?
48 ÷ 8 = ?
10 ÷ 5 = ?
64 ÷ 8 = ?
Step 2 — cross out the sentence with each answer
1.The villain charges with three sharp horns, then blasts a loud roar.
2.The villain swoops down from the sky, then digs a fast tunnel.
3.The villain swings a spiky tail, then digs a fast tunnel.
4.The villain charges with three sharp horns, then splashes thick mud.
5.The villain darts in on quick claws, then digs a fast tunnel.
6.The villain swings a spiky tail, then sees in the dark.
7.The villain darts in on quick claws, then sees in the dark.
8.The villain charges with three sharp horns, then sees in the dark.
9.The villain swings a spiky tail, then sniffs out hidden food.
10.The villain darts in on quick claws, then blasts a loud roar.
11.The villain charges with three sharp horns, then sniffs out hidden food.
12.The villain swoops down from the sky, then blasts a loud roar.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Case of the Snatched Egg Keeper
Culprit: Dottie (Velociraptor · Night Vision · Plain · Green · Sore Tooth)
- Clue 1 (Rounding): "THE VILLAIN CANNOT BURROW DIG"Round 141,473 to the nearest ten thousand = 140000 (T) · Round 2,844 to the nearest hundred = 2800 (E) · Round 19 to the nearest ten = 20 (L) · Round 301 to the nearest hundred = 300 (B) · Round 13,536 to the nearest thousand = 14000 (C) · Round 29 to the nearest ten = 30 (O) · Round 1,896 to the nearest thousand = 2000 (A) · Round 305,292 to the nearest ten thousand = 310000 (I) · Round 2,769,358 to the nearest hundred thousand = 2800000 (G) · Round 487,359 to the nearest hundred thousand = 500000 (D) · Round 179,554 to the nearest hundred thousand = 200000 (V) · Round 3,074,684 to the nearest hundred thousand = 3100000 (H) · Round 319,886 to the nearest hundred thousand = 300000 (N) · Round 68,258 to the nearest ten thousand = 70000 (W) · Round 525 to the nearest hundred = 500 (R) · Round 66 to the nearest ten = 70 (U)
- Clue 2 (Addition): "A WITNESS SAW A PLAIN HEAD"1273 + 787 = 2060 (A) · 2371 + 5501 = 7872 (E) · 3084 + 1459 = 4543 (S) · 1123 + 1169 = 2292 (W) · 4288 + 4251 = 8539 (T) · 4130 + 2468 = 6598 (P) · 4331 + 2409 = 6740 (I) · 3855 + 2692 = 6547 (D) · 4335 + 5261 = 9596 (N) · 740 + 1325 = 2065 (H) · 1690 + 3186 = 4876 (L)
- Clue 3 (Subtraction): "A LOUD CRUNCH HURT ITS SORE TOOTH"6029 - 3182 = 2847 (A) · 6428 - 4646 = 1782 (C) · 10639 - 4587 = 6052 (L) · 5511 - 4006 = 1505 (D) · 5318 - 562 = 4756 (S) · 5092 - 819 = 4273 (T) · 8631 - 4491 = 4140 (E) · 6829 - 2186 = 4643 (H) · 9301 - 3439 = 5862 (R) · 7363 - 1246 = 6117 (U) · 12365 - 4509 = 7856 (N) · 11834 - 4676 = 7158 (I) · 10082 - 1352 = 8730 (O)
- Clue 4 (Multiplication facts (1-12)): "A GREEN SCALE LAY BY THE TRACKS"6 × 9 = 54 (A) · 2 × 11 = 22 (R) · 5 × 6 = 30 (Y) · 4 × 5 = 20 (T) · 2 × 7 = 14 (S) · 11 × 4 = 44 (H) · 1 × 5 = 5 (E) · 3 × 5 = 15 (C) · 6 × 8 = 48 (L) · 7 × 1 = 7 (N) · 1 × 4 = 4 (B) · 11 × 11 = 121 (G) · 5 × 5 = 25 (K)
- Clue 5 (Division facts (1-12)): surviving statement (box 7) → Dottie40 ÷ 4 = 10 · 3 ÷ 3 = 1 · 28 ÷ 7 = 4 · 45 ÷ 5 = 9 · 132 ÷ 12 = 11 · 5 ÷ 1 = 5 · 96 ÷ 8 = 12 · 6 ÷ 2 = 3 · 48 ÷ 8 = 6 · 10 ÷ 5 = 2 · 64 ÷ 8 = 8
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Rounding, Addition, Subtraction, Multiplication, Division
- Reading level
- grades 3-4
- Theme
- The Case of the Snatched Egg Keeper — set in the Thunder Ridge dinosaur dig
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects