🚀 Dinosaurs, SpaceGrade 4Reading: grades 3-4Skip countingRoundingAdditionSubtractionDivision
The Great Cosmic Egg Heist
Someone has stolen the glowing Star-Egg from the Dino-Space Hatchery! The zero-gravity dome was left wide open, and the footprints lead straight to the launchpad. We must track down the thief before they blast off into deep space!
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 | Main Suit Power | Glove Upgrade | Footprint Angle | Astronaut Crest | Sensing Flaw |
|---|---|---|---|---|---|
| Valentina Rex | Jetpack Blast | Magnet Skin | Right-clawed | Glowing Blue Crest | Shiny Meteors |
| Dino Lovell | Force Shield | Freeze Ray | Left-clawed | Neon Green Scales | Loud Static |
| Yuri Raptor | Gravity Jump | Freeze Ray | Left-clawed | Glowing Blue Crest | Shiny Meteors |
| Guion Giga | Jetpack Blast | Plasma Claw | Right-clawed | Silver Space Helmet | Astro-dust |
| Sally Scales | Force Shield | Solar Sight | Left-clawed | Silver Space Helmet | Shiny Meteors |
| Mae Ptero | Force Shield | Freeze Ray | Left-clawed | Glowing Blue Crest | Astro-dust |
| Spino Kelly | Laser Tail | Solar Sight | Left-clawed | Silver Space Helmet | Loud Static |
| Barney Nebula | Jetpack Blast | Plasma Claw | Right-clawed | Silver Space Helmet | Loud Static |
| Rex Aldrin | Gravity Jump | Sonic Roar | Left-clawed | Neon Green Scales | Astro-dust |
| Hadro Jemison | Force Shield | Magnet Skin | Right-clawed | Neon Green Scales | Shiny Meteors |
| Neil Stego | Comet Dash | Magnet Skin | Left-clawed | Silver Space Helmet | Loud Static |
| Comet Clara | Gravity Jump | Plasma Claw | Right-clawed | Glowing Blue Crest | Shiny Meteors |
| Buzz Tricera | Force Shield | Solar Sight | Left-clawed | Silver Space Helmet | Loud Static |
| Astro Archie | Laser Tail | Sonic Roar | Left-clawed | Glowing Blue Crest | Shiny Meteors |
| Bucky Bronto | Force Shield | Plasma Claw | Left-clawed | Glowing Blue Crest | Shiny Meteors |
| Raptor Collins | Force Shield | Solar Sight | Left-clawed | Glowing Blue Crest | Shiny Meteors |
| Trixie Ride | Jetpack Blast | Plasma Claw | Left-clawed | Silver Space Helmet | Shiny Meteors |
| Alan Orbit | Laser Tail | Magnet Skin | Right-clawed | Silver Space Helmet | Astro-dust |
| Rexy Shepard | Force Shield | Plasma Claw | Left-clawed | Silver Space Helmet | Shiny Meteors |
| Titan Terry | Gravity Jump | Sonic Roar | Left-clawed | Glowing Blue Crest | Shiny Meteors |
| Drake Raptor | Laser Tail | Freeze Ray | Right-clawed | Neon Green Scales | Astro-dust |
Clue 1
Skip counting
We are counting the rocket fuel tanks by fives to see how far the thief flew. Let us find the missing number in the sequence.
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
10
90
12
60
110
26
26
140
110
18
22
28
12
16
18
28
T
10
33
16
12
42
26
140
16
50
140
55
26
140
25
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14T
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20S
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, ___, 21, 24N
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, ___, 60, 70M
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130I
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110H
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, ___, 28, 30L
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, ___, 65, 70V
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, ___, 15, 18E
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, ___, 30, 32O
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65C
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, ___, 24, 26D
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, ___, 150, 160A
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, ___, 30, 35W
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, ___, 45, 48P
0/16 letters found
Clue 2
Rounding
The main space radar only shows rounded numbers. We must round the star coordinate to the nearest ten to clear up the fuzzy screen.
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
2900
30
2000
5000
370
370
T
2900
900
1300
20
300
T
2900
50
50
30
370
200
500
3700
2000
5000
T
2900
170
3700
500
200
2000
7000
50
T
2900
2000
900
Round 2,883 to the nearest hundredT
Round 2,089 to the nearest thousandE
Round 366 to the nearest tenO
Round 4,511 to the nearest thousandF
Round 52 to the nearest tenS
Round 169 to the nearest tenC
Round 3,674 to the nearest hundredL
Round 510 to the nearest hundredA
Round 31 to the nearest tenH
Round 18 to the nearest tenI
Round 7,163 to the nearest thousandD
Round 1,275 to the nearest hundredR
Round 927 to the nearest hundredP
Round 348 to the nearest hundredN
Round 181 to the nearest hundredW
0/15 letters found
Clue 3
Addition
A friendly Brontosaurus is tallying up the broken solar panels on the dock. We need to add the two groups together to fix the grid.
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
8599
9658
7130
3941
3885
T
8599
2099
3658
3658
7130
9094
T
8599
2099
3885
T
8599
4569
8531
7130
4569
T
8599
3885
9658
8492
2490
3941
7715
7130
T
8599
7130
2099
8531
3885
3162 + 5437 =T
2549 + 1392 =Y
1396 + 1094 =N
2433 + 2136 =A
2160 + 1725 =S
2803 + 6291 =D
4736 + 4922 =H
1070 + 1029 =O
5464 + 3067 =R
3231 + 5261 =I
1988 + 1670 =P
3334 + 4381 =M
2676 + 4454 =E
0/13 letters found
Clue 4
Subtraction
The thief dropped some space rations along the zero-gravity trail. Subtract the eaten snacks from the total to find out how many are left.
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
1883
7197
6827
4504
3154
8341
1131
7197
1273
6827
8384
2967
2257
8203
2967
8161
6001
3154
A
1883
8161
8161
3139
4504
6001
6001
2967
6150
1131
2967
A
1883
8203
1273
7676
6139 - 4256 =A
8868 - 2718 =D
5893 - 2754 =P
9549 - 1346 =R
13110 - 4769 =I
12071 - 4395 =Y
10196 - 1812 =U
10729 - 3532 =G
9096 - 3095 =T
8976 - 4472 =O
6059 - 4786 =B
4110 - 1143 =E
3316 - 162 =W
4809 - 3678 =N
5313 - 3056 =C
9690 - 1529 =S
7770 - 943 =L
0/17 letters found
Clue 5
Division facts (1-12) — the last clue
We found a pile of glowing space crystals left behind. If we share them equally among the five search teams, how many does each team 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
70 ÷ 10 = ?
36 ÷ 12 = ?
120 ÷ 12 = ?
18 ÷ 3 = ?
2 ÷ 1 = ?
16 ÷ 4 = ?
45 ÷ 9 = ?
48 ÷ 6 = ?
10 ÷ 10 = ?
36 ÷ 3 = ?
55 ÷ 5 = ?
Step 2 — cross out the sentence with each answer
1.The villain makes a comet dash through the corridor, then swings a plasma claw at the glass.
2.The villain creates a force shield to block the lasers, then swings a plasma claw at the glass.
3.The villain activates a laser tail to melt the lock, then unleashes a sonic roar to escape.
4.The villain activates a laser tail to melt the lock, then swings a plasma claw at the glass.
5.The villain performs a gravity jump over the fence, then uses solar sight to find the safe.
6.The villain uses a jetpack blast to fly high, then unleashes a sonic roar to escape.
7.The villain creates a force shield to block the lasers, then uses solar sight to find the safe.
8.The villain makes a comet dash through the corridor, then uses magnet skin to slide up the wall.
9.The villain performs a gravity jump over the fence, then unleashes a sonic roar to escape.
10.The villain performs a gravity jump over the fence, then shoots a freeze ray at the alarms.
11.The villain activates a laser tail to melt the lock, then uses solar sight to find the safe.
12.The villain makes a comet dash through the corridor, then uses solar sight to find the safe.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Great Cosmic Egg Heist
Culprit: Titan Terry (Gravity Jump · Sonic Roar · Left-clawed · Glowing Blue Crest · Shiny Meteors)
- Clue 1 (Skip counting): "THE VILLAIN DOES NOT USE PLASMA CLAW"Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14 = 10 (T) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20 = 16 (S) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, ___, 21, 24 = 18 (N) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, ___, 60, 70 = 50 (M) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130 = 110 (I) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110 = 90 (H) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, ___, 28, 30 = 26 (L) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, ___, 65, 70 = 60 (V) · 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, ___, 15, 18 = 12 (E) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, ___, 30, 32 = 28 (O) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65 = 55 (C) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, ___, 24, 26 = 22 (D) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, ___, 150, 160 = 140 (A) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, ___, 30, 35 = 25 (W) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, ___, 45, 48 = 42 (P)
- Clue 2 (Rounding): "THE FOOTPRINTS SHOW A LEFT CLAWED STEP"Round 2,883 to the nearest hundred = 2900 (T) · Round 2,089 to the nearest thousand = 2000 (E) · Round 366 to the nearest ten = 370 (O) · Round 4,511 to the nearest thousand = 5000 (F) · Round 52 to the nearest ten = 50 (S) · Round 169 to the nearest ten = 170 (C) · Round 3,674 to the nearest hundred = 3700 (L) · Round 510 to the nearest hundred = 500 (A) · Round 31 to the nearest ten = 30 (H) · Round 18 to the nearest ten = 20 (I) · Round 7,163 to the nearest thousand = 7000 (D) · Round 1,275 to the nearest hundred = 1300 (R) · Round 927 to the nearest hundred = 900 (P) · Round 348 to the nearest hundred = 300 (N) · Round 181 to the nearest hundred = 200 (W)
- Clue 3 (Addition): "THEY STOPPED TO STARE AT SHINY METEORS"3162 + 5437 = 8599 (T) · 2549 + 1392 = 3941 (Y) · 1396 + 1094 = 2490 (N) · 2433 + 2136 = 4569 (A) · 2160 + 1725 = 3885 (S) · 2803 + 6291 = 9094 (D) · 4736 + 4922 = 9658 (H) · 1070 + 1029 = 2099 (O) · 5464 + 3067 = 8531 (R) · 3231 + 5261 = 8492 (I) · 1988 + 1670 = 3658 (P) · 3334 + 4381 = 7715 (M) · 2676 + 4454 = 7130 (E)
- Clue 4 (Subtraction): "A GLOWING BLUE CREST WAS SPOTTED NEARBY"6139 - 4256 = 1883 (A) · 8868 - 2718 = 6150 (D) · 5893 - 2754 = 3139 (P) · 9549 - 1346 = 8203 (R) · 13110 - 4769 = 8341 (I) · 12071 - 4395 = 7676 (Y) · 10196 - 1812 = 8384 (U) · 10729 - 3532 = 7197 (G) · 9096 - 3095 = 6001 (T) · 8976 - 4472 = 4504 (O) · 6059 - 4786 = 1273 (B) · 4110 - 1143 = 2967 (E) · 3316 - 162 = 3154 (W) · 4809 - 3678 = 1131 (N) · 5313 - 3056 = 2257 (C) · 9690 - 1529 = 8161 (S) · 7770 - 943 = 6827 (L)
- Clue 5 (Division facts (1-12)): surviving statement (box 9) → Titan Terry70 ÷ 10 = 7 · 36 ÷ 12 = 3 · 120 ÷ 12 = 10 · 18 ÷ 3 = 6 · 2 ÷ 1 = 2 · 16 ÷ 4 = 4 · 45 ÷ 9 = 5 · 48 ÷ 6 = 8 · 10 ÷ 10 = 1 · 36 ÷ 3 = 12 · 55 ÷ 5 = 11
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Skip counting, Rounding, Addition, Subtraction, Division
- Reading level
- grades 3-4
- Theme
- The Great Cosmic Egg Heist — set in Orbiting Crater Station
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects