🚀 SpaceGrade 4Reading: grades 3-4RoundingAdditionSubtractionMultiplicationDivision
The Case of the Comet Crook
Someone snuck aboard Orbit-9 and grabbed the Station Captain right out of the control room. The alarm bells are still ringing, and twenty-four pilots are docked at the rings. Only one of them is the Comet Crook, and you must find out who.
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 | Ship Class | Gadget | Pilot Type | Hull Color | Weakness |
|---|---|---|---|---|---|
| Indra Voss | Scout Pod | Tractor Beam | human pilot | blue hull | sticky foam |
| Cosmo Jang | Cargo Hauler | Drone Swarm | robot pilot | silver hull | sticky foam |
| Ace Tam | Mining Rig | Cloaking Field | human pilot | blue hull | sticky foam |
| Tess Ray | Rocket Racer | Drone Swarm | human pilot | red hull | bright flashlights |
| Dash Coro | Rocket Racer | Drone Swarm | robot pilot | silver hull | bright flashlights |
| Nova Reed | Scout Pod | Cloaking Field | robot pilot | red hull | loud sirens |
| Juno Sky | Scout Pod | Warp Jump | robot pilot | red hull | loud sirens |
| Luna Vance | Battle Cruiser | Warp Jump | human pilot | silver hull | loud sirens |
| Captain Bex | Rocket Racer | Warp Jump | human pilot | blue hull | bright flashlights |
| Pip Rocket | Cargo Hauler | Cloaking Field | human pilot | blue hull | loud sirens |
| Rex Orbit | Battle Cruiser | Tractor Beam | robot pilot | blue hull | bright flashlights |
| Orin Pax | Battle Cruiser | Tractor Beam | human pilot | blue hull | bright flashlights |
| Mira Belt | Cargo Hauler | Force Shield | human pilot | blue hull | bright flashlights |
| Milo Star | Mining Rig | Tractor Beam | human pilot | blue hull | bright flashlights |
| Sol Marko | Battle Cruiser | Force Shield | human pilot | red hull | bright flashlights |
| Vega Quill | Scout Pod | Drone Swarm | robot pilot | silver hull | bright flashlights |
| Comet Lee | Mining Rig | Cloaking Field | robot pilot | red hull | sticky foam |
| Gus Halo | Scout Pod | Force Shield | human pilot | silver hull | bright flashlights |
| Astro Pim | Cargo Hauler | Drone Swarm | human pilot | blue hull | bright flashlights |
| Pilot Zara | Scout Pod | Cloaking Field | human pilot | red hull | loud sirens |
| Riva Dune | Cargo Hauler | Warp Jump | robot pilot | silver hull | sticky foam |
Clue 1
Rounding
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
1400
70000
1400000
2800000
7000
47000
47000
300
7000
3100
2800
300
3100
3100
3100000
T
1400
200
300
2000
5000
28000
30
4700000
5000
Round 1,381 to the nearest hundredT
Round 68,789 to the nearest ten thousandH
Round 1,400,867 to the nearest hundred thousandE
Round 2,803,575 to the nearest hundred thousandV
Round 7,019 to the nearest thousandI
Round 47,147 to the nearest thousandL
Round 321 to the nearest hundredA
Round 3,064 to the nearest hundredN
Round 2,777 to the nearest hundredC
Round 3,090,693 to the nearest hundred thousandO
Round 196 to the nearest hundredW
Round 2,043 to the nearest thousandR
Round 4,795 to the nearest thousandP
Round 28,475 to the nearest thousandJ
Round 27 to the nearest tenU
Round 4,684,251 to the nearest hundred thousandM
0/16 letters found
Clue 2
Addition
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
2622
4428
8304
5340
6315
3605
9806
9806
9806
A
2622
4428
A
2622
6257
2320
6784
A
2622
6315
5672
8304
2532
9285
5340
5621
2532
3605
3605
1312 + 1310 =A
3100 + 1328 =W
2934 + 5370 =I
2257 + 3083 =T
2959 + 3356 =N
1748 + 1857 =E
4683 + 5123 =S
3391 + 2866 =H
731 + 1589 =U
3065 + 3719 =M
2281 + 3391 =P
1611 + 921 =L
2901 + 6384 =O
3261 + 2360 =F
0/14 letters found
Clue 3
Subtraction
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
5370
8505
7150
2680
6953
6744
T
5370
6953
1313
7026
2461
8376
7642
3080
8505
T
5370
4336
6953
2680
7454
3931
1313
T
5370
8505
4336
6101
1313
3080
8505
T
5370
2461
5550
6953
4240
8505
5550
1313
3080
8505
T
5370
4240
8338 - 2968 =T
10928 - 2423 =H
8428 - 1278 =E
6034 - 3354 =C
8894 - 1941 =A
10078 - 3334 =P
2996 - 1683 =I
7491 - 465 =N
4830 - 2369 =F
8658 - 282 =O
9070 - 1428 =U
5319 - 2239 =G
6401 - 2065 =B
10542 - 3088 =K
8583 - 4652 =W
7647 - 1546 =R
7878 - 2328 =L
5264 - 1024 =S
0/18 letters found
Clue 4
Multiplication facts (1–12)
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
B
20
10
24
96
27
24
10
10
30
12
99
108
48
66
12
121
10
96
64
48
22
108
48
27
96
42
22
55
35
2 × 10 =B
1 × 10 =L
12 × 2 =U
12 × 8 =E
3 × 9 =H
5 × 6 =P
12 × 1 =A
9 × 11 =I
9 × 12 =N
4 × 12 =T
6 × 11 =W
11 × 11 =S
8 × 8 =F
2 × 11 =O
6 × 7 =D
11 × 5 =C
5 × 7 =K
0/17 letters found
Clue 5
Division facts (1–12) — 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
27 ÷ 9 = ?
110 ÷ 10 = ?
77 ÷ 11 = ?
18 ÷ 2 = ?
25 ÷ 5 = ?
10 ÷ 10 = ?
24 ÷ 4 = ?
24 ÷ 2 = ?
14 ÷ 7 = ?
32 ÷ 8 = ?
20 ÷ 2 = ?
Step 2 — cross out the sentence with each answer
1.The villain blasts the door locks, then hides behind a force shield.
2.The villain zooms in fast and quiet, then calls in a swarm of drones.
3.The villain backs up to the cargo bay, then scrambles the alarm wires.
4.The villain zooms in fast and quiet, then vanishes behind a cloaking field.
5.The villain backs up to the cargo bay, then yanks the captain with a tractor beam.
6.The villain blasts the door locks, then vanishes behind a cloaking field.
7.The villain backs up to the cargo bay, then hides behind a force shield.
8.The villain blasts the door locks, then yanks the captain with a tractor beam.
9.The villain blasts the door locks, then calls in a swarm of drones.
10.The villain backs up to the cargo bay, then calls in a swarm of drones.
11.The villain drills through the outer wall, then yanks the captain with a tractor beam.
12.The villain drills through the outer wall, then calls in a swarm of drones.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Case of the Comet Crook
Culprit: Orin Pax (Battle Cruiser · Tractor Beam · human pilot · blue hull · bright flashlights)
- Clue 1 (Rounding): "THE VILLAIN CANNOT WARP JUMP"Round 1,381 to the nearest hundred = 1400 (T) · Round 68,789 to the nearest ten thousand = 70000 (H) · Round 1,400,867 to the nearest hundred thousand = 1400000 (E) · Round 2,803,575 to the nearest hundred thousand = 2800000 (V) · Round 7,019 to the nearest thousand = 7000 (I) · Round 47,147 to the nearest thousand = 47000 (L) · Round 321 to the nearest hundred = 300 (A) · Round 3,064 to the nearest hundred = 3100 (N) · Round 2,777 to the nearest hundred = 2800 (C) · Round 3,090,693 to the nearest hundred thousand = 3100000 (O) · Round 196 to the nearest hundred = 200 (W) · Round 2,043 to the nearest thousand = 2000 (R) · Round 4,795 to the nearest thousand = 5000 (P) · Round 28,475 to the nearest thousand = 28000 (J) · Round 27 to the nearest ten = 30 (U) · Round 4,684,251 to the nearest hundred thousand = 4700000 (M)
- Clue 2 (Addition): "A WITNESS SAW A HUMAN PILOT FLEE"1312 + 1310 = 2622 (A) · 3100 + 1328 = 4428 (W) · 2934 + 5370 = 8304 (I) · 2257 + 3083 = 5340 (T) · 2959 + 3356 = 6315 (N) · 1748 + 1857 = 3605 (E) · 4683 + 5123 = 9806 (S) · 3391 + 2866 = 6257 (H) · 731 + 1589 = 2320 (U) · 3065 + 3719 = 6784 (M) · 2281 + 3391 = 5672 (P) · 1611 + 921 = 2532 (L) · 2901 + 6384 = 9285 (O) · 3261 + 2360 = 5621 (F)
- Clue 3 (Subtraction): "THE CAPTAIN FOUGHT BACK WITH BRIGHT FLASHLIGHTS"8338 - 2968 = 5370 (T) · 10928 - 2423 = 8505 (H) · 8428 - 1278 = 7150 (E) · 6034 - 3354 = 2680 (C) · 8894 - 1941 = 6953 (A) · 10078 - 3334 = 6744 (P) · 2996 - 1683 = 1313 (I) · 7491 - 465 = 7026 (N) · 4830 - 2369 = 2461 (F) · 8658 - 282 = 8376 (O) · 9070 - 1428 = 7642 (U) · 5319 - 2239 = 3080 (G) · 6401 - 2065 = 4336 (B) · 10542 - 3088 = 7454 (K) · 8583 - 4652 = 3931 (W) · 7647 - 1546 = 6101 (R) · 7878 - 2328 = 5550 (L) · 5264 - 1024 = 4240 (S)
- Clue 4 (Multiplication facts (1–12)): "BLUE HULL PAINT WAS LEFT ON THE DOCK"2 × 10 = 20 (B) · 1 × 10 = 10 (L) · 12 × 2 = 24 (U) · 12 × 8 = 96 (E) · 3 × 9 = 27 (H) · 5 × 6 = 30 (P) · 12 × 1 = 12 (A) · 9 × 11 = 99 (I) · 9 × 12 = 108 (N) · 4 × 12 = 48 (T) · 6 × 11 = 66 (W) · 11 × 11 = 121 (S) · 8 × 8 = 64 (F) · 2 × 11 = 22 (O) · 6 × 7 = 42 (D) · 11 × 5 = 55 (C) · 5 × 7 = 35 (K)
- Clue 5 (Division facts (1–12)): surviving statement (box 8) → Orin Pax27 ÷ 9 = 3 · 110 ÷ 10 = 11 · 77 ÷ 11 = 7 · 18 ÷ 2 = 9 · 25 ÷ 5 = 5 · 10 ÷ 10 = 1 · 24 ÷ 4 = 6 · 24 ÷ 2 = 12 · 14 ÷ 7 = 2 · 32 ÷ 8 = 4 · 20 ÷ 2 = 10
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 Comet Crook — set in the space station Orbit-9
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects