🤖 RobotsGrade 3Reading: grades 7-9MultiplicationRoundingAdditionSubtractionDivision
The Cybernetic Nexus Sabotage
A security breach at the Cybernetic Nexus Citadel has taken down the mainframe, and an unidentified rogue android is behind the sabotage.
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 Module | Secondary Tool | Status Light | Wiring Color | System Vulnerability |
|---|---|---|---|---|---|
| Rodney Brooks | Plasma Torch | Data Probe | Right Indicator Active | Copper Wiring | Magnet Interference |
| George Devol | Sonic Wave | Data Probe | Left Indicator Active | Gold Wiring | Water Splash |
| Fei-Fei Li | Plasma Torch | Data Probe | Left Indicator Active | Gold Wiring | Water Splash |
| John von Neumann | Sonic Wave | Power Drill | Left Indicator Active | Gold Wiring | High Frequency Signal |
| Yoshua Bengio | Sonic Wave | Micro Scanner | Right Indicator Active | Silver Wiring | High Frequency Signal |
| Sam Altman | Plasma Torch | Power Drill | Left Indicator Active | Copper Wiring | Water Splash |
| Sebastian Thrun | EMP Blast | Micro Scanner | Left Indicator Active | Copper Wiring | Water Splash |
| Alan Turing | Sonic Wave | Data Probe | Right Indicator Active | Silver Wiring | Magnet Interference |
| Demis Hassabis | EMP Blast | Data Probe | Right Indicator Active | Copper Wiring | Magnet Interference |
| Claude Shannon | EMP Blast | Arc Welder | Left Indicator Active | Silver Wiring | Water Splash |
| Norbert Wiener | Plasma Torch | Data Probe | Left Indicator Active | Copper Wiring | Water Splash |
| Geoffrey Hinton | Laser Cutter | Data Probe | Left Indicator Active | Copper Wiring | Magnet Interference |
| Isaac Asimov | Sonic Wave | Power Drill | Right Indicator Active | Gold Wiring | High Frequency Signal |
| Arthur Clarke | Graviton Beam | Micro Scanner | Left Indicator Active | Silver Wiring | Water Splash |
| Philip Dick | Laser Cutter | Arc Welder | Right Indicator Active | Gold Wiring | Magnet Interference |
| Marc Raibert | Laser Cutter | Micro Scanner | Right Indicator Active | Silver Wiring | Magnet Interference |
| Cynthia Breazeal | Laser Cutter | Arc Welder | Right Indicator Active | Copper Wiring | Water Splash |
| Andrew Ng | Graviton Beam | Cyber Deck | Left Indicator Active | Copper Wiring | High Frequency Signal |
| Ada Lovelace | Plasma Torch | Cyber Deck | Left Indicator Active | Copper Wiring | Water Splash |
| Yann LeCun | Sonic Wave | Cyber Deck | Left Indicator Active | Copper Wiring | Water Splash |
| Joseph Engelberger | Graviton Beam | Cyber Deck | Left Indicator Active | Silver Wiring | Water Splash |
Clue 1
Multiplication facts (1-12)
To trace the rogue bot, you examine grid storage crates arranged in equal rows.
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
16
9
144
4
108
15
15
90
108
7
40
21
144
36
7
21
T
16
84
36
144
90
63
21
12
144
54
40
54
108
15
15
8 × 2 =T
7 × 12 =U
5 × 8 =D
4 × 9 =S
1 × 12 =W
7 × 3 =O
9 × 1 =H
4 × 1 =V
12 × 9 =I
3 × 5 =L
7 × 1 =N
12 × 12 =E
9 × 7 =P
9 × 6 =R
9 × 10 =A
0/15 letters found
Clue 2
Rounding
The sensors on the perimeter gate only display rounded distance measurements.
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
90
70
30
200
500
20
20
20
80
W
90
80
5000
500
6000
30
70
200
7000
70
900
80
30
8000
9000
5000
70
800
3000
30
700
5000
70
200
4000
70
200
800
Round 89 to the nearest tenW
Round 474 to the nearest hundredE
Round 181 to the nearest hundredN
Round 26 to the nearest tenT
Round 3,363 to the nearest thousandH
Round 78 to the nearest tenA
Round 5,480 to the nearest thousandL
Round 802 to the nearest hundredG
Round 7,812 to the nearest thousandO
Round 21 to the nearest tenS
Round 9,199 to the nearest thousandR
Round 652 to the nearest hundredB
Round 886 to the nearest hundredC
Round 6,502 to the nearest thousandD
Round 66 to the nearest tenI
Round 6,313 to the nearest thousandF
Round 4,269 to the nearest thousandK
0/17 letters found
Clue 3
Addition
You tally up the stolen power cells from each maintenance 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.
D
206
585
980
585
486
D
206
585
778
644
972
644
585
D
206
907
235
907
767
585
778
644
496
843
907
644
795
767
888
585
644
835
907
496
585
143 + 63 =D
174 + 312 =N
427 + 553 =F
321 + 567 =O
372 + 213 =E
401 + 243 =S
412 + 423 =C
568 + 275 =L
499 + 473 =U
123 + 112 =W
369 + 538 =A
371 + 424 =H
251 + 245 =P
513 + 265 =R
376 + 391 =T
0/15 letters found
Clue 4
Subtraction
Comparing original battery capacity to current levels reveals the drain.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
E
686
608
198
299
E
686
828
367
E
686
836
276
842
604
836
367
842
516
516
E
686
740
604
198
740
198
828
799
814
860
860
276
E
686
836
367
E
686
828
E
686
965 - 279 =E
1033 - 234 =G
829 - 15 =A
933 - 329 =W
430 - 232 =I
1184 - 342 =O
868 - 32 =S
1117 - 289 =N
523 - 247 =H
1033 - 173 =T
562 - 195 =C
866 - 350 =P
564 - 265 =D
758 - 18 =R
725 - 117 =V
0/15 letters found
Clue 5
Division facts (1-12) — the last clue
Dividing the remaining data packets equally across backup servers exposes a pattern.
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
144 ÷ 12 = ?
72 ÷ 8 = ?
90 ÷ 9 = ?
24 ÷ 6 = ?
27 ÷ 9 = ?
45 ÷ 9 = ?
8 ÷ 4 = ?
8 ÷ 8 = ?
11 ÷ 1 = ?
14 ÷ 2 = ?
30 ÷ 5 = ?
Step 2 — cross out the sentence with each answer
1.The villain ignited a plasma torch, then drilled with the power drill.
2.The villain blasted a sonic wave, then drilled with the power drill.
3.The villain emitted an emp blast, then jacked into the data probe.
4.The villain blasted a sonic wave, then scanned with the micro scanner.
5.The villain blasted a sonic wave, then jacked into the data probe.
6.The villain ignited a plasma torch, then scanned with the micro scanner.
7.The villain emitted an emp blast, then drilled with the power drill.
8.The villain emitted an emp blast, then scanned with the micro scanner.
9.The villain ignited a plasma torch, then jacked into the data probe.
10.The villain ignited a plasma torch, then accessed the cyber deck.
11.The villain focused a graviton beam, then accessed the cyber deck.
12.The villain blasted a sonic wave, then accessed the cyber deck.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Cybernetic Nexus Sabotage
Culprit: Sebastian Thrun (EMP Blast · Micro Scanner · Left Indicator Active · Copper Wiring · Water Splash)
- Clue 1 (Multiplication facts (1-12)): "THE VILLAIN DOES NOT USE A POWER DRILL"8 × 2 = 16 (T) · 7 × 12 = 84 (U) · 5 × 8 = 40 (D) · 4 × 9 = 36 (S) · 1 × 12 = 12 (W) · 7 × 3 = 21 (O) · 9 × 1 = 9 (H) · 4 × 1 = 4 (V) · 12 × 9 = 108 (I) · 3 × 5 = 15 (L) · 7 × 1 = 7 (N) · 12 × 12 = 144 (E) · 9 × 7 = 63 (P) · 9 × 6 = 54 (R) · 9 × 10 = 90 (A)
- Clue 2 (Rounding): "WITNESS SAW A LEFT INDICATOR LIGHT BLINKING"Round 89 to the nearest ten = 90 (W) · Round 474 to the nearest hundred = 500 (E) · Round 181 to the nearest hundred = 200 (N) · Round 26 to the nearest ten = 30 (T) · Round 3,363 to the nearest thousand = 3000 (H) · Round 78 to the nearest ten = 80 (A) · Round 5,480 to the nearest thousand = 5000 (L) · Round 802 to the nearest hundred = 800 (G) · Round 7,812 to the nearest thousand = 8000 (O) · Round 21 to the nearest ten = 20 (S) · Round 9,199 to the nearest thousand = 9000 (R) · Round 652 to the nearest hundred = 700 (B) · Round 886 to the nearest hundred = 900 (C) · Round 6,502 to the nearest thousand = 7000 (D) · Round 66 to the nearest ten = 70 (I) · Round 6,313 to the nearest thousand = 6000 (F) · Round 4,269 to the nearest thousand = 4000 (K)
- Clue 3 (Addition): "DEFENDERS USED A WATER SPLASH TO ESCAPE"143 + 63 = 206 (D) · 174 + 312 = 486 (N) · 427 + 553 = 980 (F) · 321 + 567 = 888 (O) · 372 + 213 = 585 (E) · 401 + 243 = 644 (S) · 412 + 423 = 835 (C) · 568 + 275 = 843 (L) · 499 + 473 = 972 (U) · 123 + 112 = 235 (W) · 369 + 538 = 907 (A) · 371 + 424 = 795 (H) · 251 + 245 = 496 (P) · 513 + 265 = 778 (R) · 376 + 391 = 767 (T)
- Clue 4 (Subtraction): "EVIDENCE SHOWS COPPER WIRING AT THE SCENE"965 - 279 = 686 (E) · 1033 - 234 = 799 (G) · 829 - 15 = 814 (A) · 933 - 329 = 604 (W) · 430 - 232 = 198 (I) · 1184 - 342 = 842 (O) · 868 - 32 = 836 (S) · 1117 - 289 = 828 (N) · 523 - 247 = 276 (H) · 1033 - 173 = 860 (T) · 562 - 195 = 367 (C) · 866 - 350 = 516 (P) · 564 - 265 = 299 (D) · 758 - 18 = 740 (R) · 725 - 117 = 608 (V)
- Clue 5 (Division facts (1-12)): surviving statement (box 8) → Sebastian Thrun144 ÷ 12 = 12 · 72 ÷ 8 = 9 · 90 ÷ 9 = 10 · 24 ÷ 6 = 4 · 27 ÷ 9 = 3 · 45 ÷ 9 = 5 · 8 ÷ 4 = 2 · 8 ÷ 8 = 1 · 11 ÷ 1 = 11 · 14 ÷ 2 = 7 · 30 ÷ 5 = 6
About this mystery
- Grade level
- Grade 3 math
- Math topics
- Multiplication, Rounding, Addition, Subtraction, Division
- Reading level
- grades 7-9
- Theme
- The Cybernetic Nexus Sabotage — set in Cybernetic Nexus Citadel
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects