🦕 DinosaursGrade 4Reading: grades 3-4Place valueAdditionSubtractionWord problemsDivision
The Golden Egg Mystery
Someone snuck into the Dino-Discovery Lab and took the glowing golden T-Rex egg! As a junior ranger, you must track down the culprit before the egg hatches.
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 Power | Lab Gadget | Footprint | Feather Crest | Distraction |
|---|---|---|---|---|---|
| Luis Alvarez | T-Rex Chomp | Stun Net | Left Clawed | Bright Green Feathers | Squeaky Toys |
| Paul Sereno | Stegosaurus Tail Whip | Sonic Whistle | Right Clawed | Bright Green Feathers | Shiny Flashlights |
| Scout Sarah | Pterodactyl Flight | Night Goggles | Left Clawed | Ruby Red Spikes | Crunchy Dino Treats |
| Jack Horner | Triceratops Bash | Sonic Whistle | Right Clawed | Bright Green Feathers | Squeaky Toys |
| Ranger Rex | Pterodactyl Flight | Night Goggles | Left Clawed | Bright Green Feathers | Squeaky Toys |
| Dino Dan | Stegosaurus Tail Whip | Grappling Hook | Left Clawed | Ruby Red Spikes | Squeaky Toys |
| Sandy Clay | Raptor Speed | Grappling Hook | Left Clawed | Bright Green Feathers | Squeaky Toys |
| Bucky Bone | Stegosaurus Tail Whip | Stun Net | Right Clawed | Sandy Yellow Crest | Squeaky Toys |
| Digging Dave | Raptor Speed | Sonic Whistle | Right Clawed | Sandy Yellow Crest | Shiny Flashlights |
| Fossil Fiona | Stegosaurus Tail Whip | Laser Tracker | Left Clawed | Bright Green Feathers | Crunchy Dino Treats |
| Rocky Stone | Stegosaurus Tail Whip | Laser Tracker | Left Clawed | Ruby Red Spikes | Squeaky Toys |
| Tracker Toby | T-Rex Chomp | Sonic Whistle | Left Clawed | Bright Green Feathers | Squeaky Toys |
| Professor Paws | T-Rex Chomp | Grappling Hook | Right Clawed | Sandy Yellow Crest | Squeaky Toys |
| Dr Ellie | Stegosaurus Tail Whip | Night Goggles | Right Clawed | Bright Green Feathers | Shiny Flashlights |
| Gary Giganoto | Triceratops Bash | Grappling Hook | Left Clawed | Ruby Red Spikes | Crunchy Dino Treats |
| Mary Anning | Pterodactyl Flight | Stun Net | Right Clawed | Bright Green Feathers | Squeaky Toys |
| Barnum Brown | T-Rex Chomp | Laser Tracker | Left Clawed | Bright Green Feathers | Squeaky Toys |
| Dr Grant | T-Rex Chomp | Laser Tracker | Left Clawed | Bright Green Feathers | Crunchy Dino Treats |
| Hunter Herb | T-Rex Chomp | Grappling Hook | Left Clawed | Bright Green Feathers | Squeaky Toys |
| Amber Fossil | T-Rex Chomp | Sonic Whistle | Right Clawed | Ruby Red Spikes | Squeaky Toys |
| Bob Bakker | Raptor Speed | Sonic Whistle | Right Clawed | Bright Green Feathers | Squeaky Toys |
Clue 1
Place value
We check the digital security panel on the lab door. The screen flashes a large code, but the hundreds digit is smudged. Find the correct digit to unlock the first 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
7000
80
8000
T
7000
80
70
8000
30
6000
70
6000
100
10
T
7000
9000
4000
8000
400
3000
5000
400
20
20
200
70
100
3000
80
10
10
50
What is the value of the 7 in 47,333?T
What is the value of the 8 in 9,585?H
What is the value of the 4 in 435?A
What is the value of the 3 in 930?F
What is the value of the 6 in 6,348?D
What is the value of the 5 in 856?K
What is the value of the 1 in 6,310?O
What is the value of the 4 in 84,516?S
What is the value of the 7 in 878?I
What is the value of the 3 in 3,199?G
What is the value of the 2 in 1,241?L
What is the value of the 5 in 5,617?R
What is the value of the 9 in 69,237?U
What is the value of the 1 in 196?N
What is the value of the 8 in 38,017?E
What is the value of the 2 in 7,721?P
0/16 letters found
Clue 2
Addition
The thief scrambled the fossilized teeth collection! We need to add up the fossil counts in all three drawers to make sure none are missing and find our 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.
T
2769
2574
4803
T
2769
9301
2380
5784
8743
4202
4202
2574
7773
3937
T
2769
2574
4803
5414
4803
6769
T
2769
6769
7773
7773
T
2769
2106
9301
4803
4202
4202
4803
5469
5469
4803
4803
2106
4803
9301
1845 + 924 =T
2374 + 1828 =S
954 + 1152 =P
3976 + 4767 =K
3439 + 1975 =L
3302 + 1501 =E
2812 + 6489 =R
1612 + 2325 =W
1549 + 831 =A
2067 + 4702 =F
3341 + 2128 =D
2880 + 2904 =C
1778 + 796 =H
4784 + 2989 =O
0/14 letters found
Clue 3
Subtraction
To measure how far the thief fled, we check the dinosaur energy meter. Subtract the used power from the total starting power to see where they stopped.
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
2771
6177
8236
7101
6530
8070
8236
3737
2360
4111
1889
1124
2722
T
2771
1124
4111
7101
T
2771
1124
8248
8248
8236
1889
T
2771
6177
8236
3737
T
2771
T
2771
3737
5614
2360
6939 - 4168 =T
10089 - 2988 =S
7442 - 3331 =Y
6533 - 2796 =A
2230 - 341 =D
2709 - 349 =K
12343 - 4095 =P
7502 - 1888 =C
8508 - 438 =U
4655 - 1933 =G
7332 - 1155 =H
10912 - 4382 =Q
10171 - 1935 =E
3778 - 2654 =O
0/14 letters found
Clue 4
Word problems
A baby triceratops is hungry! Solve this leafy feeding problem to calm down the dinosaur so we can safely read the clue dropped in its pen.
Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.
Astrandof hairturnedupatthescene.
B
80
79
78
45
66
31
45
79
30
30
N
F
30
A
31
66
30
79
S
Ranger Cody lined up 10 rows of 8 dinosaur treats. How many dinosaur treats in all?B
Ranger Cody found 15 glowing eggs yesterday and 16 more today. How many glowing eggs in all?T
Ranger Cody found 31 dino footprints yesterday and 14 more today. How many dino footprints in all?G
There were 114 dino footprints. 35 were used up. How many dino footprints are left?R
There were 92 fossil brushes. 26 were used up. How many fossil brushes are left?H
There were 113 fossil brushes. 35 were used up. How many fossil brushes are left?I
Ranger Cody lined up 10 rows of 3 dinosaur treats. How many dinosaur treats in all?E
0/7 letters found
Clue 5
Division facts (1-12) — the last clue
We found a box of ancient amber stones dropped by the thief. If we divide them equally among our team, how many stones does each ranger get?
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
14 ÷ 7 = ?
5 ÷ 1 = ?
70 ÷ 10 = ?
80 ÷ 10 = ?
30 ÷ 3 = ?
48 ÷ 12 = ?
18 ÷ 2 = ?
60 ÷ 10 = ?
1 ÷ 1 = ?
36 ÷ 3 = ?
24 ÷ 8 = ?
Step 2 — cross out the sentence with each answer
1.The villain smashed through the heavy wooden gate, then threw a heavy web net.
2.The villain roared like a mighty tyrannosaurus, then shined a red laser on the wall.
3.The villain soared over the protective fence, then threw a heavy web net.
4.The villain roared like a mighty tyrannosaurus, then glowed with night vision lenses.
5.The villain soared over the protective fence, then glowed with night vision lenses.
6.The villain dashed past the fossil displays, then shined a red laser on the wall.
7.The villain roared like a mighty tyrannosaurus, then threw a heavy web net.
8.The villain smashed through the heavy wooden gate, then shined a red laser on the wall.
9.The villain smashed through the heavy wooden gate, then swung away using a thick rope.
10.The villain swung a heavy spiky tail around, then blew a loud sonic whistle.
11.The villain roared like a mighty tyrannosaurus, then blew a loud sonic whistle.
12.The villain soared over the protective fence, then swung away using a thick rope.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Golden Egg Mystery
Culprit: Tracker Toby (T-Rex Chomp · Sonic Whistle · Left Clawed · Bright Green Feathers · Squeaky Toys)
- Clue 1 (Place value): "THE THIEF DID NOT USE A GRAPPLING HOOK"What is the value of the 7 in 47,333? = 7000 (T) · What is the value of the 8 in 9,585? = 80 (H) · What is the value of the 4 in 435? = 400 (A) · What is the value of the 3 in 930? = 30 (F) · What is the value of the 6 in 6,348? = 6000 (D) · What is the value of the 5 in 856? = 50 (K) · What is the value of the 1 in 6,310? = 10 (O) · What is the value of the 4 in 84,516? = 4000 (S) · What is the value of the 7 in 878? = 70 (I) · What is the value of the 3 in 3,199? = 3000 (G) · What is the value of the 2 in 1,241? = 200 (L) · What is the value of the 5 in 5,617? = 5000 (R) · What is the value of the 9 in 69,237? = 9000 (U) · What is the value of the 1 in 196? = 100 (N) · What is the value of the 8 in 38,017? = 8000 (E) · What is the value of the 2 in 7,721? = 20 (P)
- Clue 2 (Addition): "THE TRACKS SHOW THE LEFT FOOT PRESSED DEEPER"1845 + 924 = 2769 (T) · 2374 + 1828 = 4202 (S) · 954 + 1152 = 2106 (P) · 3976 + 4767 = 8743 (K) · 3439 + 1975 = 5414 (L) · 3302 + 1501 = 4803 (E) · 2812 + 6489 = 9301 (R) · 1612 + 2325 = 3937 (W) · 1549 + 831 = 2380 (A) · 2067 + 4702 = 6769 (F) · 3341 + 2128 = 5469 (D) · 2880 + 2904 = 5784 (C) · 1778 + 796 = 2574 (H) · 4784 + 2989 = 7773 (O)
- Clue 3 (Subtraction): "THE SQUEAKY DOG TOY STOPPED THE ATTACK"6939 - 4168 = 2771 (T) · 10089 - 2988 = 7101 (S) · 7442 - 3331 = 4111 (Y) · 6533 - 2796 = 3737 (A) · 2230 - 341 = 1889 (D) · 2709 - 349 = 2360 (K) · 12343 - 4095 = 8248 (P) · 7502 - 1888 = 5614 (C) · 8508 - 438 = 8070 (U) · 4655 - 1933 = 2722 (G) · 7332 - 1155 = 6177 (H) · 10912 - 4382 = 6530 (Q) · 10171 - 1935 = 8236 (E) · 3778 - 2654 = 1124 (O)
- Clue 4 (Word problems): "BRIGHT GREEN FEATHERS"Ranger Cody lined up 10 rows of 8 dinosaur treats. How many dinosaur treats in all? = 80 (B) · Ranger Cody found 15 glowing eggs yesterday and 16 more today. How many glowing eggs in all? = 31 (T) · Ranger Cody found 31 dino footprints yesterday and 14 more today. How many dino footprints in all? = 45 (G) · There were 114 dino footprints. 35 were used up. How many dino footprints are left? = 79 (R) · There were 92 fossil brushes. 26 were used up. How many fossil brushes are left? = 66 (H) · There were 113 fossil brushes. 35 were used up. How many fossil brushes are left? = 78 (I) · Ranger Cody lined up 10 rows of 3 dinosaur treats. How many dinosaur treats in all? = 30 (E)
- Clue 5 (Division facts (1-12)): surviving statement (box 11) → Tracker Toby14 ÷ 7 = 2 · 5 ÷ 1 = 5 · 70 ÷ 10 = 7 · 80 ÷ 10 = 8 · 30 ÷ 3 = 10 · 48 ÷ 12 = 4 · 18 ÷ 2 = 9 · 60 ÷ 10 = 6 · 1 ÷ 1 = 1 · 36 ÷ 3 = 12 · 24 ÷ 8 = 3
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Place value, Addition, Subtraction, Word problems, Division
- Reading level
- grades 3-4
- Theme
- The Golden Egg Mystery — set in Dino-Discovery Lab
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects