🚀 SpaceGrade 7Reading: grades 7-9Place valueIntegersPercentagesOrder of operationsTwo-step equations
The Lunar Base Sabotage
Someone tampered with the emergency life support scrubbers in Sector 4! Commander Vance needs your mathematical skills to analyze telemetry logs, narrow down the suspect pool, and unmask the saboteur before they flee on the supply shuttle.
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 | Primary Gadget | Auxiliary Gear | Watch Wrist | Helmet Trim | Countermeasure |
|---|---|---|---|---|---|
| Katherine Johnson | Gravity Boots | Thermal Shield | Right Handed Watch | Neon Blue Trim | Water Mist |
| John Glenn | Plasma Torch | Stealth Cloak | Right Handed Watch | Neon Blue Trim | Water Mist |
| Mae Jemison | Ion Thruster | Stealth Cloak | Right Handed Watch | Neon Blue Trim | Foam Spray |
| Carolyn Porco | EMP Grenade | Signal Jammer | Right Handed Watch | Cosmic Red Trim | Water Mist |
| Yuri Gagarin | EMP Grenade | Thermal Shield | Right Handed Watch | Neon Blue Trim | Magnet Lock |
| Chris Hadfield | Plasma Torch | Hologram Projector | Right Handed Watch | Solar Yellow Trim | Water Mist |
| Peggy Whitson | Ion Thruster | Hack Tool | Right Handed Watch | Neon Blue Trim | Water Mist |
| Vera Rubin | Laser Cutter | Signal Jammer | Right Handed Watch | Neon Blue Trim | Foam Spray |
| Christina Koch | Laser Cutter | Hack Tool | Left Handed Watch | Solar Yellow Trim | Foam Spray |
| Neil Armstrong | Ion Thruster | Hologram Projector | Right Handed Watch | Neon Blue Trim | Water Mist |
| Sally Ride | Ion Thruster | Thermal Shield | Right Handed Watch | Cosmic Red Trim | Water Mist |
| Kalpana Chawla | Plasma Torch | Thermal Shield | Right Handed Watch | Solar Yellow Trim | Foam Spray |
| Michael Collins | Gravity Boots | Signal Jammer | Right Handed Watch | Neon Blue Trim | Water Mist |
| Buzz Aldrin | EMP Grenade | Stealth Cloak | Left Handed Watch | Solar Yellow Trim | Foam Spray |
| Alan Shepard | EMP Grenade | Signal Jammer | Left Handed Watch | Solar Yellow Trim | Foam Spray |
| Carl Sagan | Plasma Torch | Thermal Shield | Left Handed Watch | Neon Blue Trim | Water Mist |
| Hakeem Oluseyi | Gravity Boots | Hack Tool | Right Handed Watch | Solar Yellow Trim | Magnet Lock |
| Nancy Roman | Laser Cutter | Hack Tool | Left Handed Watch | Cosmic Red Trim | Water Mist |
| Kip Thorne | Gravity Boots | Stealth Cloak | Left Handed Watch | Neon Blue Trim | Magnet Lock |
| Ellen Ochoa | Plasma Torch | Signal Jammer | Left Handed Watch | Neon Blue Trim | Foam Spray |
| Victor Glover | Plasma Torch | Hack Tool | Right Handed Watch | Solar Yellow Trim | Magnet Lock |
Clue 1
Place value
A security log recorded a digital passcode entry where digit placement reveals the gear code.
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
400
3000
5000
80
60
70
40
T
400
5000
900
600
2000
40
5000
80
4000
40
T
400
900
80
5000
60
80
T
400
5000
60
100
T
400
3000
500
100
40
60
1000
What is the value of the 4 in 909,455?T
What is the value of the 5 in 701,541?C
What is the value of the 8 in 457,283?S
What is the value of the 2 in 72,335?D
What is the value of the 6 in 875,651?R
What is the value of the 4 in 658,246?O
What is the value of the 1 in 751,329?K
What is the value of the 1 in 72,189?L
What is the value of the 4 in 14,786?N
What is the value of the 5 in 25,409?E
What is the value of the 6 in 970,565?A
What is the value of the 7 in 48,072?B
What is the value of the 3 in 793,998?H
What is the value of the 9 in 18,972?U
0/14 letters found
Clue 2
Integers
Thermal sensors tracked altitude and temperature shifts below zero to pinpoint the target bay.
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
4
28
2
12
24
12
11
2
10
T
4
7
8
13
2
18
7
18
T
4
10
28
8
5
T
4
28
2
13
21
3
28
T
4
7
13
21
12
T
4
2 - (-2) =T
24 - (-4) =H
12 - (-1) =R
16 - (-8) =U
(-6) + 8 =E
(-10) + 20 =C
(-8) + 11 =G
(-6) + 24 =A
16 - (-5) =I
(-10) + 21 =P
(-8) + 15 =W
(-1) + 6 =N
(-11) + 23 =S
(-11) + 19 =O
0/14 letters found
Clue 3
Percentages
The life support console displayed battery drain percentages during the power surge.
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
31
29
45
57
21
57
47
45
53
T
31
37
7
57
29
45
50
35
10
7
53
23
10
54
37
7
T
31
45
5
40
59
57
T
31
50% of 62 =T
10% of 230 =K
20% of 235 =P
20% of 175 =D
5% of 580 =H
25% of 228 =S
20% of 35 =A
50% of 80 =M
50% of 106 =C
10% of 100 =B
10% of 210 =U
50% of 118 =I
10% of 50 =R
25% of 200 =L
10% of 540 =Y
10% of 450 =E
10% of 370 =W
0/17 letters found
Clue 4
Order of operations
An automated diagnostic routine ran a multistep formula to calculate power distribution.
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
107
114
77
91
S
107
94
11
50
12
S
107
78
50
57
65
25
103
65
43
84
114
25
91
11
77
36
97 + 5 × 2 =S
9 × 10 - 25 =N
11 × 11 - 18 =O
4 × 7 - 16 =P
8 × 5 - 4 =M
7 × 10 - 20 =A
10 × 10 - 9 =T
78 + 4 × 9 =U
5 + 2 × 3 =R
15 + 7 × 9 =H
30 + 8 × 8 =C
9 × 10 - 6 =L
7 × 10 - 13 =D
9 + 8 × 2 =E
7 × 8 - 13 =B
65 + 2 × 6 =I
0/16 letters found
Clue 5
Two-step equations — the last clue
The station AI set up a balance equation between oxygen production and usage to isolate the discrepancy.
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
6x + 1 = 7, x = ?
2x + 4 = 14, x = ?
2x + 9 = 13, x = ?
2x + 4 = 12, x = ?
5x + 8 = 53, x = ?
4x + 5 = 49, x = ?
2x + 2 = 22, x = ?
3x + 7 = 28, x = ?
3x + 3 = 12, x = ?
6x + 2 = 38, x = ?
4x + 9 = 57, x = ?
Step 2 — cross out the sentence with each answer
1.The villain walked up the exterior bulkhead, then deflected high heat alarms.
2.The villain blasted across the docking bay, then bypassed security firewalls.
3.The villain melted the secondary airlock seal, then blocked emergency transmissions.
4.The villain melted the secondary airlock seal, then vanished from sensor feeds.
5.The villain blasted across the docking bay, then created a false decoy signal.
6.The villain blasted across the docking bay, then blocked emergency transmissions.
7.The villain melted the secondary airlock seal, then deflected high heat alarms.
8.The villain walked up the exterior bulkhead, then blocked emergency transmissions.
9.The villain sliced through the maintenance hatch, then vanished from sensor feeds.
10.The villain fried the local relay circuit, then vanished from sensor feeds.
11.The villain melted the secondary airlock seal, then bypassed security firewalls.
12.The villain blasted across the docking bay, then vanished from sensor feeds.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Lunar Base Sabotage
Culprit: Michael Collins (Gravity Boots · Signal Jammer · Right Handed Watch · Neon Blue Trim · Water Mist)
- Clue 1 (Place value): "THE SABOTEUR DOES NOT USE A STEALTH CLOAK"What is the value of the 4 in 909,455? = 400 (T) · What is the value of the 5 in 701,541? = 500 (C) · What is the value of the 8 in 457,283? = 80 (S) · What is the value of the 2 in 72,335? = 2000 (D) · What is the value of the 6 in 875,651? = 600 (R) · What is the value of the 4 in 658,246? = 40 (O) · What is the value of the 1 in 751,329? = 1000 (K) · What is the value of the 1 in 72,189? = 100 (L) · What is the value of the 4 in 14,786? = 4000 (N) · What is the value of the 5 in 25,409? = 5000 (E) · What is the value of the 6 in 970,565? = 60 (A) · What is the value of the 7 in 48,072? = 70 (B) · What is the value of the 3 in 793,998? = 3000 (H) · What is the value of the 9 in 18,972? = 900 (U)
- Clue 2 (Integers): "THE SUSPECT WORE A WATCH ON THE RIGHT WRIST"2 - (-2) = 4 (T) · 24 - (-4) = 28 (H) · 12 - (-1) = 13 (R) · 16 - (-8) = 24 (U) · (-6) + 8 = 2 (E) · (-10) + 20 = 10 (C) · (-8) + 11 = 3 (G) · (-6) + 24 = 18 (A) · 16 - (-5) = 21 (I) · (-10) + 21 = 11 (P) · (-8) + 15 = 7 (W) · (-1) + 6 = 5 (N) · (-11) + 23 = 12 (S) · (-11) + 19 = 8 (O)
- Clue 3 (Percentages): "THE SUSPECT WAS HELD BACK BY WATER MIST"50% of 62 = 31 (T) · 10% of 230 = 23 (K) · 20% of 235 = 47 (P) · 20% of 175 = 35 (D) · 5% of 580 = 29 (H) · 25% of 228 = 57 (S) · 20% of 35 = 7 (A) · 50% of 80 = 40 (M) · 50% of 106 = 53 (C) · 10% of 100 = 10 (B) · 10% of 210 = 21 (U) · 50% of 118 = 59 (I) · 10% of 50 = 5 (R) · 25% of 200 = 50 (L) · 10% of 540 = 54 (Y) · 10% of 450 = 45 (E) · 10% of 370 = 37 (W)
- Clue 4 (Order of operations): "SUIT SCRAPS HAD NEON BLUE TRIM"97 + 5 × 2 = 107 (S) · 9 × 10 - 25 = 65 (N) · 11 × 11 - 18 = 103 (O) · 4 × 7 - 16 = 12 (P) · 8 × 5 - 4 = 36 (M) · 7 × 10 - 20 = 50 (A) · 10 × 10 - 9 = 91 (T) · 78 + 4 × 9 = 114 (U) · 5 + 2 × 3 = 11 (R) · 15 + 7 × 9 = 78 (H) · 30 + 8 × 8 = 94 (C) · 9 × 10 - 6 = 84 (L) · 7 × 10 - 13 = 57 (D) · 9 + 8 × 2 = 25 (E) · 7 × 8 - 13 = 43 (B) · 65 + 2 × 6 = 77 (I)
- Clue 5 (Two-step equations): surviving statement (box 8) → Michael Collins6x + 1 = 7, x = 1 · 2x + 4 = 14, x = 5 · 2x + 9 = 13, x = 2 · 2x + 4 = 12, x = 4 · 5x + 8 = 53, x = 9 · 4x + 5 = 49, x = 11 · 2x + 2 = 22, x = 10 · 3x + 7 = 28, x = 7 · 3x + 3 = 12, x = 3 · 6x + 2 = 38, x = 6 · 4x + 9 = 57, x = 12
About this mystery
- Grade level
- Grade 7 math
- Math topics
- Place value, Integers, Percentages, Order of operations, Two-step equations
- Reading level
- grades 7-9
- Theme
- The Lunar Base Sabotage — set in Lunar Outpost Alpha
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects