🚀 SpaceGrade 4Reading: grades 3-4AdditionSubtractionRoundingMultiplicationDivision
The Cosmic Core Heist
The gravity generator is offline and the Cosmic Core is gone! We need to find the Cosmic Saboteur before the whole space station floats away into the deep dark void.
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 | Space Skill | Astral Gear | Suited Hand | Visor Glow Color | Gear Weakness |
|---|---|---|---|---|---|
| Cadet Kira | asteroid blasting | force fields | right-handed glove | silver spike hair | bright flashlights |
| Buzz Aldrin | asteroid blasting | rocket boots | left-handed glove | comet orange hair | bright flashlights |
| Neil Armstrong | laser piloting | stealth cloaks | left-handed glove | silver spike hair | loud sirens |
| Captain Comet | laser piloting | rocket boots | right-handed glove | neon blue hair | bright flashlights |
| Captain Star | gravity warping | force fields | right-handed glove | silver spike hair | loud sirens |
| Officer Nebula | laser piloting | force fields | left-handed glove | comet orange hair | freeze spray |
| Pilot Aurora | plasma hacking | rocket boots | left-handed glove | silver spike hair | loud sirens |
| Pilot Orion | asteroid blasting | force fields | left-handed glove | neon blue hair | loud sirens |
| Alan Shepard | laser piloting | solar shields | left-handed glove | comet orange hair | loud sirens |
| Pilot Jax | plasma hacking | force fields | left-handed glove | silver spike hair | loud sirens |
| Yuri Gagarin | laser piloting | magnet gloves | right-handed glove | comet orange hair | bright flashlights |
| Cadet Helix | plasma hacking | magnet gloves | right-handed glove | neon blue hair | freeze spray |
| Cadet Vega | laser piloting | rocket boots | right-handed glove | comet orange hair | freeze spray |
| John Glenn | asteroid blasting | solar shields | right-handed glove | comet orange hair | bright flashlights |
| Sally Ride | gravity warping | stealth cloaks | left-handed glove | neon blue hair | bright flashlights |
| Cadet Leo | gravity warping | magnet gloves | left-handed glove | silver spike hair | loud sirens |
| Cadet Luna | zero-g jumping | magnet gloves | left-handed glove | silver spike hair | loud sirens |
| Cadet Nova | gravity warping | force fields | right-handed glove | comet orange hair | loud sirens |
| Officer Cosmos | zero-g jumping | stealth cloaks | left-handed glove | comet orange hair | bright flashlights |
| Peggy Whitson | zero-g jumping | force fields | left-handed glove | neon blue hair | loud sirens |
| Pilot Polaris | plasma hacking | magnet gloves | left-handed glove | silver spike hair | freeze spray |
Clue 1
Addition
We counted the damaged solar panels in sector one and then added the broken panels in sector two to find the total damage.
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
9842
9690
5002
3601
4535
2036
2036
4873
4535
4686
6437
3910
5002
3895
4686
3910
T
9842
5079
3895
5002
3895
T
9842
5002
4873
2036
T
9842
9690
5455
2036
3910
4873
9318
3895
6432 + 3410 =T
5139 + 4551 =H
1902 + 2008 =O
2958 + 1915 =A
1328 + 2273 =V
5307 + 4011 =K
2402 + 2284 =N
2442 + 3013 =C
1062 + 974 =L
2898 + 2104 =E
2638 + 2441 =U
1272 + 2623 =S
3087 + 1448 =I
2342 + 4095 =D
0/14 letters found
Clue 2
Subtraction
The ship computer had a set number of fuel canisters, but some were stolen. We subtracted the remaining canisters to see how many were lost.
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
5178
4792
2572
5640
8850
8260
3620
1461
8333
T
5178
6564
1461
4583
3620
3620
2572
6564
1703
8260
2572
2169
T
5178
4792
1703
6479
6564
2572
6564
5210
8260
4583
4106
2572
6633 - 1455 =T
3225 - 1764 =R
5402 - 1296 =V
2331 - 628 =A
6414 - 3842 =E
12065 - 3805 =L
9902 - 3423 =N
6715 - 2132 =O
7243 - 1603 =C
6900 - 2108 =H
9323 - 4113 =G
4145 - 525 =P
12045 - 3195 =U
10873 - 2540 =I
6565 - 4396 =F
11430 - 4866 =D
0/16 letters found
Clue 3
Rounding
Our long-range space scanner cannot get an exact number of alien meteors, so we had to round the count to the nearest ten.
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
20
9000
70
2000
900
2000
2300
70
3000
T
20
1300
370
2000
2000
3000
370
300
70
1700
90
430
110
30
900
1700
2000
230
300
70
4300
2000
Round 18 to the nearest tenT
Round 2,308 to the nearest thousandS
Round 2,323 to the nearest hundredP
Round 370 to the nearest tenA
Round 230 to the nearest tenI
Round 1,252 to the nearest hundredW
Round 71 to the nearest tenE
Round 27 to the nearest tenO
Round 2,961 to the nearest thousandC
Round 4,275 to the nearest hundredN
Round 327 to the nearest hundredR
Round 92 to the nearest tenB
Round 8,719 to the nearest thousandH
Round 106 to the nearest tenL
Round 429 to the nearest tenY
Round 1,682 to the nearest hundredD
Round 884 to the nearest hundredU
0/17 letters found
Clue 4
Multiplication facts (1-12)
We found crates of space suits stacked in equal rows, so we multiplied the rows by the suits in each row to count them fast.
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
33
9
56
64
30
144
S
33
121
9
54
30
45
81
9
144
15
81
S
33
56
30
50
32
2
36
32
45
30
45
30
56
72
30
32
11 × 3 =S
8 × 4 =T
3 × 3 =I
12 × 6 =M
12 × 12 =R
8 × 8 =V
11 × 11 =P
5 × 6 =E
8 × 7 =L
3 × 5 =W
9 × 9 =A
9 × 5 =H
2 × 1 =O
9 × 4 =N
5 × 10 =F
6 × 9 =K
0/16 letters found
Clue 5
Division facts (1-12) — the last clue
The rescue team had to share the remaining oxygen packs equally among the crew cabins, so we divided the total packs.
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
24 ÷ 2 = ?
20 ÷ 10 = ?
12 ÷ 2 = ?
9 ÷ 3 = ?
48 ÷ 6 = ?
32 ÷ 8 = ?
20 ÷ 2 = ?
42 ÷ 6 = ?
50 ÷ 10 = ?
66 ÷ 6 = ?
63 ÷ 7 = ?
Step 2 — cross out the sentence with each answer
1.The villain hacked the plasma core, then activated a force field.
2.The villain hacked the plasma core, then zipped away with rocket boots.
3.The villain warped the ship gravity, then blocked the sensors with a solar shield.
4.The villain piloted the laser ship, then slipped past with a stealth cloak.
5.The villain piloted the laser ship, then grabbed the core with magnet gloves.
6.The villain jumped in zero gravity, then grabbed the core with magnet gloves.
7.The villain jumped in zero gravity, then activated a force field.
8.The villain piloted the laser ship, then zipped away with rocket boots.
9.The villain hacked the plasma core, then slipped past with a stealth cloak.
10.The villain warped the ship gravity, then slipped past with a stealth cloak.
11.The villain hacked the plasma core, then blocked the sensors with a solar shield.
12.The villain warped the ship gravity, then grabbed the core with magnet gloves.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Cosmic Core Heist
Culprit: Pilot Jax (plasma hacking · force fields · left-handed glove · silver spike hair · loud sirens)
- Clue 1 (Addition): "THE VILLAIN DOES NOT USE STEALTH CLOAKS"6432 + 3410 = 9842 (T) · 5139 + 4551 = 9690 (H) · 1902 + 2008 = 3910 (O) · 2958 + 1915 = 4873 (A) · 1328 + 2273 = 3601 (V) · 5307 + 4011 = 9318 (K) · 2402 + 2284 = 4686 (N) · 2442 + 3013 = 5455 (C) · 1062 + 974 = 2036 (L) · 2898 + 2104 = 5002 (E) · 2638 + 2441 = 5079 (U) · 1272 + 2623 = 3895 (S) · 3087 + 1448 = 4535 (I) · 2342 + 4095 = 6437 (D)
- Clue 2 (Subtraction): "THE CULPRIT DROPPED A LEFT HANDED GLOVE"6633 - 1455 = 5178 (T) · 3225 - 1764 = 1461 (R) · 5402 - 1296 = 4106 (V) · 2331 - 628 = 1703 (A) · 6414 - 3842 = 2572 (E) · 12065 - 3805 = 8260 (L) · 9902 - 3423 = 6479 (N) · 6715 - 2132 = 4583 (O) · 7243 - 1603 = 5640 (C) · 6900 - 2108 = 4792 (H) · 9323 - 4113 = 5210 (G) · 4145 - 525 = 3620 (P) · 12045 - 3195 = 8850 (U) · 10873 - 2540 = 8333 (I) · 6565 - 4396 = 2169 (F) · 11430 - 4866 = 6564 (D)
- Clue 3 (Rounding): "THE SUSPECT WAS SCARED BY LOUD SIRENS"Round 18 to the nearest ten = 20 (T) · Round 2,308 to the nearest thousand = 2000 (S) · Round 2,323 to the nearest hundred = 2300 (P) · Round 370 to the nearest ten = 370 (A) · Round 230 to the nearest ten = 230 (I) · Round 1,252 to the nearest hundred = 1300 (W) · Round 71 to the nearest ten = 70 (E) · Round 27 to the nearest ten = 30 (O) · Round 2,961 to the nearest thousand = 3000 (C) · Round 4,275 to the nearest hundred = 4300 (N) · Round 327 to the nearest hundred = 300 (R) · Round 92 to the nearest ten = 90 (B) · Round 8,719 to the nearest thousand = 9000 (H) · Round 106 to the nearest ten = 110 (L) · Round 429 to the nearest ten = 430 (Y) · Round 1,682 to the nearest hundred = 1700 (D) · Round 884 to the nearest hundred = 900 (U)
- Clue 4 (Multiplication facts (1-12)): "SILVER SPIKE HAIR WAS LEFT ON THE HELMET"11 × 3 = 33 (S) · 8 × 4 = 32 (T) · 3 × 3 = 9 (I) · 12 × 6 = 72 (M) · 12 × 12 = 144 (R) · 8 × 8 = 64 (V) · 11 × 11 = 121 (P) · 5 × 6 = 30 (E) · 8 × 7 = 56 (L) · 3 × 5 = 15 (W) · 9 × 9 = 81 (A) · 9 × 5 = 45 (H) · 2 × 1 = 2 (O) · 9 × 4 = 36 (N) · 5 × 10 = 50 (F) · 6 × 9 = 54 (K)
- Clue 5 (Division facts (1-12)): surviving statement (box 1) → Pilot Jax24 ÷ 2 = 12 · 20 ÷ 10 = 2 · 12 ÷ 2 = 6 · 9 ÷ 3 = 3 · 48 ÷ 6 = 8 · 32 ÷ 8 = 4 · 20 ÷ 2 = 10 · 42 ÷ 6 = 7 · 50 ÷ 10 = 5 · 66 ÷ 6 = 11 · 63 ÷ 7 = 9
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Addition, Subtraction, Rounding, Multiplication, Division
- Reading level
- grades 3-4
- Theme
- The Cosmic Core Heist — set in Cosmic Outpost Delta
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects