🤖 RobotsGrade 10Reading: grades 7-9Place valueAdditionFractions of a numberSubtractionMissing addends
The Gearworks Assembly Yard Incident
A rogue automaton has overwritten its safety protocols and escaped the testing bays of the Gearworks Assembly Yard, locking the Chief Systems Engineer in the server vault. We must decode the system logs to identify the rogue unit before it shuts down the central power grid.
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 Protocol | Sub-Routine | Sensor Flare | LED Head Fiber | System Vulnerability |
|---|---|---|---|---|---|
| Norbert Wiener | Laser Welding | Firewall Hacking | Right-side camera flare | Green fiber optics | Static charge |
| Isaac Asimov | Hologram Mimicking | Gravity Inversion | Left-side camera flare | Green fiber optics | Copper rust |
| Nikola Tesla | Hologram Mimicking | Nanite Swarming | Left-side camera flare | Green fiber optics | Copper rust |
| Feifei Li | Magnetic Levitating | Plasma Shielding | Right-side camera flare | Red fiber optics | Loud vibrations |
| George Devol | Magnetic Levitating | Firewall Hacking | Right-side camera flare | Green fiber optics | Loud vibrations |
| Ayanna Howard | Sonic Screaming | Firewall Hacking | Left-side camera flare | Blue fiber optics | Static charge |
| Cynthia Breazeal | Sonic Screaming | EMP Shockwave | Right-side camera flare | Red fiber optics | Loud vibrations |
| Grace Hopper | Sub-Zero Cooling | Nanite Swarming | Right-side camera flare | Green fiber optics | Static charge |
| Victor Scheinman | Magnetic Levitating | Plasma Shielding | Right-side camera flare | Green fiber optics | Static charge |
| John McCarthy | Sonic Screaming | Nanite Swarming | Right-side camera flare | Red fiber optics | Static charge |
| Claude Shannon | Hologram Mimicking | EMP Shockwave | Left-side camera flare | Green fiber optics | Static charge |
| Joseph Engelberger | Sonic Screaming | Firewall Hacking | Right-side camera flare | Green fiber optics | Loud vibrations |
| Hedy Lamarr | Sub-Zero Cooling | EMP Shockwave | Left-side camera flare | Green fiber optics | Copper rust |
| Anita Borg | Hologram Mimicking | Firewall Hacking | Right-side camera flare | Red fiber optics | Loud vibrations |
| Philip Dick | Magnetic Levitating | Nanite Swarming | Left-side camera flare | Green fiber optics | Loud vibrations |
| Radia Perlman | Laser Welding | Nanite Swarming | Left-side camera flare | Red fiber optics | Loud vibrations |
| Rodney Brooks | Sub-Zero Cooling | Nanite Swarming | Right-side camera flare | Green fiber optics | Loud vibrations |
| Marc Raibert | Sonic Screaming | Gravity Inversion | Right-side camera flare | Red fiber optics | Loud vibrations |
| Ada Lovelace | Sonic Screaming | Nanite Swarming | Left-side camera flare | Green fiber optics | Copper rust |
| Margaret Hamilton | Magnetic Levitating | Nanite Swarming | Right-side camera flare | Red fiber optics | Loud vibrations |
| Tim Berners-Lee | Hologram Mimicking | Plasma Shielding | Right-side camera flare | Green fiber optics | Loud vibrations |
Clue 1
Place value
The terminal console requires us to analyze a base-ten memory register to find the first trace.
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
60
9000
200
20
500
900
300
200
800
500
T
60
100
70
4000
4000
500
T
60
90
500
2000
50
20
200
80
70
600
600
9000
70
100
7000
50
4000
900
What is the value of the 6 in 938,260?T
What is the value of the 6 in 240,612?L
What is the value of the 8 in 991,186?W
What is the value of the 5 in 93,523?O
What is the value of the 2 in 640,323?R
What is the value of the 7 in 15,475?A
What is the value of the 9 in 79,870?H
What is the value of the 9 in 185,091?D
What is the value of the 9 in 37,904?G
What is the value of the 3 in 777,399?U
What is the value of the 8 in 224,826?B
What is the value of the 7 in 657,631?K
What is the value of the 4 in 734,536?N
What is the value of the 5 in 61,253?I
What is the value of the 2 in 983,216?E
What is the value of the 1 in 363,174?C
What is the value of the 2 in 52,843?F
0/17 letters found
Clue 2
Addition
We total the energy draw from the bypassed auxiliary cells to track the robot's escape path.
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
6659
7860
8328
9239
4271
9711
8015
2070
5904
R
6659
8015
7602
5092
8015
R
6659
5904
7509
5928
3135
4271
4271
5904
9714
3135
3512
R
6659
5904
9711
3135
R
6659
9714
7860
3512
8328
3174 + 3485 =R
4517 + 3343 =I
1412 + 658 =M
1743 + 1392 =O
3221 + 2683 =E
3763 + 4565 =G
4168 + 5071 =H
4783 + 2819 =F
3203 + 2725 =P
1761 + 1751 =N
1528 + 2743 =T
4359 + 3656 =A
5246 + 2263 =S
3321 + 6390 =C
5904 + 3810 =D
1697 + 3395 =L
0/16 letters found
Clue 3
Fractions of a number
We calculate the fractional share of reserve coolant left in the tanks to narrow down the target.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
M
28
57
38
48
24
33
9
36
53
47
33
54
33
11
57
45
38
47
24
60
35
53
56
45
57
36
53
47
33
54
1/2 of 56 =M
7/8 of 64 =B
1/2 of 22 =E
3/10 of 180 =S
2/5 of 95 =L
2/4 of 114 =A
3/5 of 15 =C
4/10 of 120 =F
4/8 of 90 =R
3/6 of 94 =O
2/4 of 120 =D
1/4 of 96 =U
1/2 of 70 =V
8/10 of 45 =T
2/4 of 66 =N
5/10 of 106 =I
0/16 letters found
Clue 4
Subtraction
By subtracting the depleted power grid readings, we pinpoint the exact magnitude of the escape 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.
R
7376
8253
7128
1733
3229
1483
8253
R
7376
8533
4087
1582
3229
4734
4087
3229
8253
4734
8253
3946
3946
1573
8253
8253
4087
8253
7128
5867
4087
10341 - 2965 =R
9291 - 758 =O
4470 - 524 =S
3563 - 1990 =W
9704 - 1451 =E
4575 - 2993 =T
4978 - 3495 =B
7405 - 277 =D
5333 - 3600 =F
6961 - 1094 =U
7767 - 3033 =C
5585 - 2356 =I
6806 - 2719 =P
0/13 letters found
Clue 5
Missing addends — the last clue
To crack the final security lock, we must find the missing current value needed to balance the grid circuit.
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
2 + ___ = 5
6 + ___ = 14
18 + ___ = 24
11 + ___ = 22
9 + ___ = 14
24 + ___ = 36
5 + ___ = 6
31 + ___ = 35
36 + ___ = 43
24 + ___ = 34
11 + ___ = 13
Step 2 — cross out the sentence with each answer
1.The villain fires a welding laser, then triggers gravity inversion.
2.The villain activates magnetic levitation, then discharges an EMP shockwave.
3.The villain unleashes a sonic scream, then triggers gravity inversion.
4.The villain activates magnetic levitation, then triggers gravity inversion.
5.The villain creates a hologram mimic, then deploys a nanite swarming cloud.
6.The villain activates magnetic levitation, then deploys a nanite swarming cloud.
7.The villain creates a hologram mimic, then bypasses security via firewall hacking.
8.The villain unleashes a sonic scream, then discharges an EMP shockwave.
9.The villain activates magnetic levitation, then raises a plasma shielding barrier.
10.The villain fires a welding laser, then raises a plasma shielding barrier.
11.The villain unleashes a sonic scream, then deploys a nanite swarming cloud.
12.The villain unleashes a sonic scream, then bypasses security via firewall hacking.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Gearworks Assembly Yard Incident
Culprit: Feifei Li (Magnetic Levitating · Plasma Shielding · Right-side camera flare · Red fiber optics · Loud vibrations)
- Clue 1 (Place value): "THE ROGUE BOT CANNOT DO FIREWALL HACKING"What is the value of the 6 in 938,260? = 60 (T) · What is the value of the 6 in 240,612? = 600 (L) · What is the value of the 8 in 991,186? = 80 (W) · What is the value of the 5 in 93,523? = 500 (O) · What is the value of the 2 in 640,323? = 20 (R) · What is the value of the 7 in 15,475? = 70 (A) · What is the value of the 9 in 79,870? = 9000 (H) · What is the value of the 9 in 185,091? = 90 (D) · What is the value of the 9 in 37,904? = 900 (G) · What is the value of the 3 in 777,399? = 300 (U) · What is the value of the 8 in 224,826? = 800 (B) · What is the value of the 7 in 657,631? = 7000 (K) · What is the value of the 4 in 734,536? = 4000 (N) · What is the value of the 5 in 61,253? = 50 (I) · What is the value of the 2 in 983,216? = 200 (E) · What is the value of the 1 in 363,174? = 100 (C) · What is the value of the 2 in 52,843? = 2000 (F)
- Clue 2 (Addition): "RIGHT CAMERA FLARE SPOTTED ON RECORDING"3174 + 3485 = 6659 (R) · 4517 + 3343 = 7860 (I) · 1412 + 658 = 2070 (M) · 1743 + 1392 = 3135 (O) · 3221 + 2683 = 5904 (E) · 3763 + 4565 = 8328 (G) · 4168 + 5071 = 9239 (H) · 4783 + 2819 = 7602 (F) · 3203 + 2725 = 5928 (P) · 1761 + 1751 = 3512 (N) · 1528 + 2743 = 4271 (T) · 4359 + 3656 = 8015 (A) · 5246 + 2263 = 7509 (S) · 3321 + 6390 = 9711 (C) · 5904 + 3810 = 9714 (D) · 1697 + 3395 = 5092 (L)
- Clue 3 (Fractions of a number): "MALFUNCTIONS NEAR LOUD VIBRATIONS"1/2 of 56 = 28 (M) · 7/8 of 64 = 56 (B) · 1/2 of 22 = 11 (E) · 3/10 of 180 = 54 (S) · 2/5 of 95 = 38 (L) · 2/4 of 114 = 57 (A) · 3/5 of 15 = 9 (C) · 4/10 of 120 = 48 (F) · 4/8 of 90 = 45 (R) · 3/6 of 94 = 47 (O) · 2/4 of 120 = 60 (D) · 1/4 of 96 = 24 (U) · 1/2 of 70 = 35 (V) · 8/10 of 45 = 36 (T) · 2/4 of 66 = 33 (N) · 5/10 of 106 = 53 (I)
- Clue 4 (Subtraction): "RED FIBER OPTIC PIECES SWEEPED UP"10341 - 2965 = 7376 (R) · 9291 - 758 = 8533 (O) · 4470 - 524 = 3946 (S) · 3563 - 1990 = 1573 (W) · 9704 - 1451 = 8253 (E) · 4575 - 2993 = 1582 (T) · 4978 - 3495 = 1483 (B) · 7405 - 277 = 7128 (D) · 5333 - 3600 = 1733 (F) · 6961 - 1094 = 5867 (U) · 7767 - 3033 = 4734 (C) · 5585 - 2356 = 3229 (I) · 6806 - 2719 = 4087 (P)
- Clue 5 (Missing addends): surviving statement (box 9) → Feifei Li2 + ___ = 5 = 3 · 6 + ___ = 14 = 8 · 18 + ___ = 24 = 6 · 11 + ___ = 22 = 11 · 9 + ___ = 14 = 5 · 24 + ___ = 36 = 12 · 5 + ___ = 6 = 1 · 31 + ___ = 35 = 4 · 36 + ___ = 43 = 7 · 24 + ___ = 34 = 10 · 11 + ___ = 13 = 2
About this mystery
- Grade level
- Grade 10 math
- Math topics
- Place value, Addition, Fractions of a number, Subtraction, Missing addends
- Reading level
- grades 7-9
- Theme
- The Gearworks Assembly Yard Incident — set in The Gearworks Assembly Yard
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects