🔎 Among UsGrade 4Reading: grades 3-4RoundingAdditionSubtractionMultiplicationDivision
The Mystery of Starship Orion
A sneaky Impostor is sabotaging tasks aboard Starship Orion! The Chief Engineer needs your detective skills to analyze clues, solve crew logs, and uncover the villain before the ship loses power.
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 | Sabotage Move | Special Gear | Dominant Hand | Visor Color | Security Trap |
|---|---|---|---|---|---|
| Pink | Comms Disruption | Gravity Boots | Right Handed | Green Visor | Security Cam |
| Black | Vent Creeping | Radar Cloak | Left Handed | Blue Visor | Flashlight |
| Banana | Door Jamming | Radar Cloak | Right Handed | Red Visor | Flashlight |
| Gray | Vent Creeping | Energy Shield | Right Handed | Green Visor | Security Cam |
| Maroon | Vent Creeping | Scanner Jammer | Right Handed | Red Visor | Flashlight |
| Navy | Comms Disruption | Energy Shield | Right Handed | Red Visor | Alarm Bell |
| Brown | Light Sabotage | Laser Cutter | Left Handed | Red Visor | Flashlight |
| Plum | Task Faking | Energy Shield | Right Handed | Red Visor | Flashlight |
| Olive | Vent Creeping | Gravity Boots | Left Handed | Blue Visor | Alarm Bell |
| Yellow | Light Sabotage | Energy Shield | Left Handed | Red Visor | Flashlight |
| Orange | Task Faking | Laser Cutter | Right Handed | Green Visor | Flashlight |
| Red | Light Sabotage | Radar Cloak | Left Handed | Red Visor | Security Cam |
| Tan | Comms Disruption | Laser Cutter | Right Handed | Green Visor | Security Cam |
| Cyan | Comms Disruption | Laser Cutter | Left Handed | Red Visor | Alarm Bell |
| Jade | Comms Disruption | Scanner Jammer | Right Handed | Green Visor | Alarm Bell |
| Lime | Vent Creeping | Laser Cutter | Left Handed | Blue Visor | Flashlight |
| White | Door Jamming | Laser Cutter | Right Handed | Blue Visor | Security Cam |
| Blue | Light Sabotage | Radar Cloak | Left Handed | Red Visor | Alarm Bell |
| Rose | Light Sabotage | Laser Cutter | Right Handed | Red Visor | Flashlight |
| Coral | Light Sabotage | Gravity Boots | Left Handed | Green Visor | Alarm Bell |
| Rust | Door Jamming | Gravity Boots | Right Handed | Red Visor | Flashlight |
Clue 1
Rounding
The navigation screen only displays approximate distance numbers. Round to the nearest tens place to unlock the first clue log.
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
4300
110
430
700
130
200
1300
1100
T
4300
1300
20
2300
1300
430
1100
170
1300
T
4300
110
2000
900
430
1100
370
2000
170
170
430
20
3700
2000
130
130
430
20
Round 4,299 to the nearest hundredT
Round 729 to the nearest hundredI
Round 170 to the nearest tenN
Round 157 to the nearest hundredP
Round 21 to the nearest tenR
Round 891 to the nearest hundredV
Round 373 to the nearest tenC
Round 1,128 to the nearest hundredS
Round 129 to the nearest tenM
Round 428 to the nearest tenE
Round 3,655 to the nearest hundredJ
Round 2,109 to the nearest thousandA
Round 111 to the nearest tenH
Round 1,322 to the nearest hundredO
Round 2,294 to the nearest hundredD
0/15 letters found
Clue 2
Addition
You find two stacks of fuel cells left near the engine room. Add the cell totals together to decode the second 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.
W
2639
9304
8203
7970
8424
4618
4618
4618
6553
W
2639
6553
4252
9304
7314
6563
8203
6563
6553
7970
2804
8424
2804
4618
7461
4618
8559
8424
8096
8203
1129 + 1510 =W
5592 + 2832 =E
4348 + 2215 =H
1585 + 1219 =D
3614 + 4482 =C
4533 + 2928 =U
4925 + 3278 =T
1298 + 2954 =R
4264 + 2289 =A
3493 + 4477 =N
1722 + 2896 =S
4119 + 3195 =G
5472 + 3832 =I
3291 + 5268 =P
0/14 letters found
Clue 3
Subtraction
A gas leak drained part of the oxygen tank in the cafeteria. Subtract the lost amount from the starting supply to find the third 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
8997
3938
1188
7702
1827
1188
4942
1486
7385
4942
7702
7702
5993
6985
6985
1486
1188
8070
3397
1549
4942
5760
3657
4942
7702
3938
3657
3527
4358
3938
T
8997
10276 - 1279 =T
8360 - 4703 =L
7403 - 1643 =F
4582 - 1055 =I
2471 - 644 =N
6280 - 4731 =Y
9488 - 2103 =W
6842 - 3445 =B
7290 - 305 =O
4476 - 538 =H
2204 - 1016 =E
7880 - 2938 =A
5732 - 1374 =G
7753 - 1760 =P
10505 - 2803 =S
10054 - 1984 =D
4180 - 2694 =K
0/17 letters found
Clue 4
Multiplication facts (1-12)
Storage crates in the cargo bay are stacked in equal rows. Multiply the rows and crates to compute the fourth 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.
R
42
50
35
64
100
21
66
R
42
96
49
R
42
30
21
1
50
R
42
50
110
66
25
28
35
49
54
54
3
50
21
24
50
28
50
6 × 7 =R
10 × 10 =I
3 × 1 =H
7 × 7 =A
12 × 8 =M
10 × 5 =E
2 × 12 =C
8 × 8 =V
11 × 6 =O
5 × 5 =U
4 × 7 =N
3 × 10 =K
3 × 7 =S
7 × 5 =D
6 × 9 =T
11 × 10 =F
1 × 1 =W
0/17 letters found
Clue 5
Division facts (1-12) — the last clue
The remaining space snacks must be shared equally among the crewmates. Divide the total snacks to get 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!
Step 1 — solve these
22 ÷ 11 = ?
121 ÷ 11 = ?
35 ÷ 7 = ?
16 ÷ 2 = ?
60 ÷ 10 = ?
12 ÷ 12 = ?
24 ÷ 2 = ?
72 ÷ 8 = ?
28 ÷ 7 = ?
90 ÷ 9 = ?
3 ÷ 1 = ?
Step 2 — cross out the sentence with each answer
1.The villain locked the bay doors, then jammed the crew scanners.
2.The villain locked the bay doors, then stomped with gravity boots.
3.The villain turned off the lights, then activated an energy shield.
4.The villain snuck through the vents, then stomped with gravity boots.
5.The villain turned off the lights, then used a laser cutter.
6.The villain pretended to do tasks, then stomped with gravity boots.
7.The villain locked the bay doors, then turned on a radar cloak.
8.The villain pretended to do tasks, then used a laser cutter.
9.The villain turned off the lights, then turned on a radar cloak.
10.The villain pretended to do tasks, then jammed the crew scanners.
11.The villain pretended to do tasks, then activated an energy shield.
12.The villain cut the radio comms, then used a laser cutter.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Mystery of Starship Orion
Culprit: Banana (Door Jamming · Radar Cloak · Right Handed · Red Visor · Flashlight)
- Clue 1 (Rounding): "THE IMPOSTOR DOES NOT HAVE SCANNER JAMMER"Round 4,299 to the nearest hundred = 4300 (T) · Round 729 to the nearest hundred = 700 (I) · Round 170 to the nearest ten = 170 (N) · Round 157 to the nearest hundred = 200 (P) · Round 21 to the nearest ten = 20 (R) · Round 891 to the nearest hundred = 900 (V) · Round 373 to the nearest ten = 370 (C) · Round 1,128 to the nearest hundred = 1100 (S) · Round 129 to the nearest ten = 130 (M) · Round 428 to the nearest ten = 430 (E) · Round 3,655 to the nearest hundred = 3700 (J) · Round 2,109 to the nearest thousand = 2000 (A) · Round 111 to the nearest ten = 110 (H) · Round 1,322 to the nearest hundred = 1300 (O) · Round 2,294 to the nearest hundred = 2300 (D)
- Clue 2 (Addition): "WITNESS SAW A RIGHT HANDED SUSPECT"1129 + 1510 = 2639 (W) · 5592 + 2832 = 8424 (E) · 4348 + 2215 = 6563 (H) · 1585 + 1219 = 2804 (D) · 3614 + 4482 = 8096 (C) · 4533 + 2928 = 7461 (U) · 4925 + 3278 = 8203 (T) · 1298 + 2954 = 4252 (R) · 4264 + 2289 = 6553 (A) · 3493 + 4477 = 7970 (N) · 1722 + 2896 = 4618 (S) · 4119 + 3195 = 7314 (G) · 5472 + 3832 = 9304 (I) · 3291 + 5268 = 8559 (P)
- Clue 3 (Subtraction): "THE SNEAK WAS SPOOKED BY A FLASHLIGHT"10276 - 1279 = 8997 (T) · 8360 - 4703 = 3657 (L) · 7403 - 1643 = 5760 (F) · 4582 - 1055 = 3527 (I) · 2471 - 644 = 1827 (N) · 6280 - 4731 = 1549 (Y) · 9488 - 2103 = 7385 (W) · 6842 - 3445 = 3397 (B) · 7290 - 305 = 6985 (O) · 4476 - 538 = 3938 (H) · 2204 - 1016 = 1188 (E) · 7880 - 2938 = 4942 (A) · 5732 - 1374 = 4358 (G) · 7753 - 1760 = 5993 (P) · 10505 - 2803 = 7702 (S) · 10054 - 1984 = 8070 (D) · 4180 - 2694 = 1486 (K)
- Clue 4 (Multiplication facts (1-12)): "RED VISOR MARKS WERE FOUND AT THE SCENE"6 × 7 = 42 (R) · 10 × 10 = 100 (I) · 3 × 1 = 3 (H) · 7 × 7 = 49 (A) · 12 × 8 = 96 (M) · 10 × 5 = 50 (E) · 2 × 12 = 24 (C) · 8 × 8 = 64 (V) · 11 × 6 = 66 (O) · 5 × 5 = 25 (U) · 4 × 7 = 28 (N) · 3 × 10 = 30 (K) · 3 × 7 = 21 (S) · 7 × 5 = 35 (D) · 6 × 9 = 54 (T) · 11 × 10 = 110 (F) · 1 × 1 = 1 (W)
- Clue 5 (Division facts (1-12)): surviving statement (box 7) → Banana22 ÷ 11 = 2 · 121 ÷ 11 = 11 · 35 ÷ 7 = 5 · 16 ÷ 2 = 8 · 60 ÷ 10 = 6 · 12 ÷ 12 = 1 · 24 ÷ 2 = 12 · 72 ÷ 8 = 9 · 28 ÷ 7 = 4 · 90 ÷ 9 = 10 · 3 ÷ 1 = 3
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Rounding, Addition, Subtraction, Multiplication, Division
- Reading level
- grades 3-4
- Theme
- The Mystery of Starship Orion — set in Starship Orion
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects