The Dino Valley Egg Caper
A sneaky thief has sneaked into the Prehistoric Safari Park and taken the prize dinosaur egg! Ranger Owen needs your help to track down the culprit before the egg hatches. Solve the math problems to unlock clues left around the valley!
Possible suspects
Cross off a row as each clue rules it out. On screen, tap a row.
| Name | Dino Suit | Special Tool | Footprint Type | Cap Color | Dino Treat |
|---|---|---|---|---|---|
| Dr Fossil | Ptero Wings | Sonic Whistle | Right Footprint | Green Cap | Sweet Berry |
| Ranger Yasmina | Anky Shield | Grappling Hook | Right Footprint | Yellow Cap | Salty Leaf |
| Ranger Kenji | T Rex Mask | Lava Boots | Left Footprint | Green Cap | Sweet Berry |
| Trixie Tricera | Anky Shield | Sonic Whistle | Left Footprint | Green Cap | Sweet Berry |
| Claire Dearing | Anky Shield | Lava Boots | Right Footprint | Green Cap | Sweet Berry |
| Ranger Darius | Anky Shield | Sonic Whistle | Left Footprint | Yellow Cap | Salty Leaf |
| Ptero Pete | Raptor Boots | Lava Boots | Left Footprint | Green Cap | Salty Leaf |
| Ranger Owen | T Rex Mask | Lava Boots | Left Footprint | Red Cap | Salty Leaf |
| Ranger Ben | Anky Shield | Lava Boots | Left Footprint | Yellow Cap | Sour Melon |
| Ranger Toby | T Rex Mask | Grappling Hook | Right Footprint | Green Cap | Salty Leaf |
| Muldoon | Tricera Horns | Glider Wings | Left Footprint | Yellow Cap | Sweet Berry |
| Sasha Raptor | Anky Shield | Sonic Whistle | Right Footprint | Green Cap | Salty Leaf |
| Dr Sattler | Anky Shield | Camo Armor | Left Footprint | Green Cap | Sour Melon |
| Ranger Kayla | Tricera Horns | Glider Wings | Left Footprint | Green Cap | Sweet Berry |
| Stego Steve | Tricera Horns | Camo Armor | Left Footprint | Yellow Cap | Salty Leaf |
| Ranger Rex | Raptor Boots | Lava Boots | Left Footprint | Green Cap | Sweet Berry |
| Ranger Sammy | T Rex Mask | Grappling Hook | Left Footprint | Green Cap | Sweet Berry |
| Nedry | Raptor Boots | Camo Armor | Right Footprint | Green Cap | Sweet Berry |
| Dr Malcolm | Ptero Wings | Grappling Hook | Left Footprint | Green Cap | Sweet Berry |
| Anky Andy | Ptero Wings | Grappling Hook | Left Footprint | Red Cap | Salty Leaf |
| Dr Grant | Anky Shield | Grappling Hook | Right Footprint | Red Cap | Sweet Berry |
Rounding
The radar scanner in the dino nursery only shows rounded numbers. Round the baby raptor weights to help Ranger Owen fix the screen and find the first hint.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
Addition
We need to count all the triceratops toys to find where the thief went. Add up the piles of rubber bones so we can track the thief.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
Subtraction
A thief stole some heavy dino food bags. Subtract the food left in the bin from the starting amount to see how much they carried away.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
Multiplication facts (1-12)
The thief packed stolen fossil boxes in rows of equal size. Multiply the rows of fossils to find the total and unlock 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.
Division facts (1-12) — the last clue
We must share the fresh leaves equally among the hungry brachiosaurs. Divide the leaves to keep the dinos happy while we read the final 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!
Name the culprit
Choose the one suspect left standing.
Answer Key — The Dino Valley Egg Caper
- Clue 1 (Rounding): "THE THIEF DOES NOT WEAR LAVA BOOTS"Round 4,846 to the nearest thousand = 5000 (T) · Round 907 to the nearest hundred = 900 (S) · Round 658 to the nearest hundred = 700 (O) · Round 342 to the nearest hundred = 300 (D) · Round 562 to the nearest hundred = 600 (W) · Round 50 to the nearest ten = 50 (V) · Round 3,563 to the nearest thousand = 4000 (F) · Round 27 to the nearest ten = 30 (B) · Round 92 to the nearest ten = 90 (A) · Round 217 to the nearest hundred = 200 (R) · Round 3,494 to the nearest thousand = 3000 (H) · Round 59 to the nearest ten = 60 (N) · Round 7,789 to the nearest thousand = 8000 (L) · Round 17 to the nearest ten = 20 (I) · Round 7,293 to the nearest thousand = 7000 (E)
- Clue 2 (Addition): "LEFT FOOTPRINT FOUND NEAR THE NEST"234 + 414 = 648 (L) · 259 + 282 = 541 (S) · 427 + 227 = 654 (D) · 281 + 162 = 443 (P) · 284 + 122 = 406 (O) · 406 + 250 = 656 (H) · 237 + 125 = 362 (F) · 451 + 268 = 719 (U) · 123 + 110 = 233 (T) · 375 + 613 = 988 (R) · 317 + 313 = 630 (N) · 231 + 181 = 412 (A) · 488 + 365 = 853 (E) · 204 + 455 = 659 (I)
- Clue 3 (Subtraction): "THE THIEF LOVES SWEET BERRY TREATS"973 - 221 = 752 (T) · 794 - 142 = 652 (R) · 774 - 234 = 540 (F) · 760 - 210 = 550 (E) · 528 - 209 = 319 (Y) · 609 - 157 = 452 (I) · 925 - 247 = 678 (A) · 738 - 292 = 446 (V) · 828 - 297 = 531 (W) · 185 - 73 = 112 (L) · 451 - 348 = 103 (O) · 943 - 141 = 802 (H) · 895 - 392 = 503 (S) · 985 - 313 = 672 (B)
- Clue 4 (Multiplication facts (1-12)): "A GREEN CAP WAS SNAGGED ON A BRANCH"7 × 1 = 7 (A) · 8 × 11 = 88 (B) · 7 × 8 = 56 (O) · 5 × 5 = 25 (R) · 1 × 5 = 5 (D) · 2 × 8 = 16 (G) · 6 × 12 = 72 (W) · 10 × 12 = 120 (E) · 11 × 2 = 22 (N) · 9 × 6 = 54 (P) · 2 × 10 = 20 (C) · 9 × 9 = 81 (H) · 6 × 10 = 60 (S)
- Clue 5 (Division facts (1-12)): surviving statement (box 8) → Trixie Tricera36 ÷ 12 = 3 · 4 ÷ 4 = 1 · 12 ÷ 2 = 6 · 8 ÷ 2 = 4 · 18 ÷ 9 = 2 · 72 ÷ 8 = 9 · 100 ÷ 10 = 10 · 77 ÷ 11 = 7 · 22 ÷ 2 = 11 · 72 ÷ 6 = 12 · 25 ÷ 5 = 5
About this mystery
- Grade level
- Grade 3 math
- Math topics
- Rounding, Addition, Subtraction, Multiplication, Division
- Reading level
- grades 3-4
- Theme
- The Dino Valley Egg Caper — set in The Prehistoric Safari Park
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects