🤖 RobotsGrade 4Reading: grades 3-4MultiplicationBar modelsSkip countingAdditionDivision
The Great Gear Heist
Someone reprogrammed a rogue bot to steal the Master Spark Plug from the Gearopolis Bot Factory! Inspect the clue logs and track down the culprit.
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 | Main Gadget | Special Module | Antenna Status | Head Wiring | Defense Hazard |
|---|---|---|---|---|---|
| Socket | Plasma Shield | Solar Panel | Left Antenna Bent | Sparking Silver Cables | Magnet Traps |
| Radar | Rocket Boost | Stealth Mode | Left Antenna Bent | Neon Blue Wires | Water Sprays |
| Gizmo | Magnet Grip | Hover Drive | Left Antenna Bent | Sparking Silver Cables | Water Sprays |
| Pixel | Laser Beam | Turbo Engine | Left Antenna Bent | Sparking Silver Cables | Water Sprays |
| Gears | Magnet Grip | Night Vision | Right Antenna Bent | Copper Wire Tufts | Water Sprays |
| Bolt | Rocket Boost | Night Vision | Right Antenna Bent | Copper Wire Tufts | Magnet Traps |
| Bytes | Magnet Grip | Solar Panel | Left Antenna Bent | Copper Wire Tufts | Water Sprays |
| Beep Boop | Plasma Shield | Stealth Mode | Left Antenna Bent | Sparking Silver Cables | Water Sprays |
| Widget | Plasma Shield | Stealth Mode | Left Antenna Bent | Copper Wire Tufts | Water Sprays |
| Wire | Rocket Boost | Turbo Engine | Left Antenna Bent | Copper Wire Tufts | Magnet Traps |
| Axle | Rocket Boost | Night Vision | Right Antenna Bent | Sparking Silver Cables | Oil Splatters |
| Volt | Rocket Boost | Night Vision | Right Antenna Bent | Sparking Silver Cables | Magnet Traps |
| Nano | Sonic Blast | Stealth Mode | Right Antenna Bent | Copper Wire Tufts | Magnet Traps |
| Clinker | Plasma Shield | Stealth Mode | Right Antenna Bent | Sparking Silver Cables | Water Sprays |
| Rotor | Magnet Grip | Night Vision | Left Antenna Bent | Sparking Silver Cables | Water Sprays |
| Cog | Sonic Blast | Solar Panel | Left Antenna Bent | Sparking Silver Cables | Water Sprays |
| Sprocket | Sonic Blast | Hover Drive | Left Antenna Bent | Sparking Silver Cables | Magnet Traps |
| Rust-E | Magnet Grip | Hover Drive | Left Antenna Bent | Copper Wire Tufts | Oil Splatters |
| Glitch | Magnet Grip | Turbo Engine | Left Antenna Bent | Sparking Silver Cables | Water Sprays |
| Sparky | Sonic Blast | Stealth Mode | Right Antenna Bent | Sparking Silver Cables | Oil Splatters |
| Piston | Sonic Blast | Hover Drive | Right Antenna Bent | Sparking Silver Cables | Water Sprays |
Clue 1
Multiplication facts (1-12)
The factory security bots march in equal rows across the assembly floor to decode the first signal.
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
22
88
72
63
18
40
40
55
18
25
24
7
72
35
25
7
T
22
88
55
63
72
55
T
22
28
144
33
7
72
25
27
18
25
72
11 × 2 =T
5 × 5 =N
12 × 12 =R
4 × 10 =L
12 × 6 =E
8 × 11 =H
3 × 9 =G
2 × 9 =I
5 × 11 =A
11 × 3 =B
4 × 7 =U
1 × 7 =O
8 × 3 =D
7 × 9 =V
7 × 5 =S
0/15 letters found
Clue 2
Bar model word problems
A diagnostic screen displays rectangular data bars comparing energy grid outputs.
Draw a bar model to solve each word problem. Its answer reveals a letter — write the letters in the boxes to fill in the missing word.
Awitnesssawthevillainwas.
L
127
33
116
44
13
35
44
33
35
35
13
21
33
35
44
There were 145 steel plates in all. 18 steel plates were used. How many steel plates are left?
draw a bar model
Answer:→L
Cadet Bot has 7 times as many battery cells as a teammate. The teammate has 3 battery cells. How many battery cells does Cadet Bot have?
draw a bar model
Answer:→B
Cadet Bot has 220 microchips, packed 5 to a bag. How many bags can be filled?
draw a bar model
Answer:→T
There were 154 battery cells in all. 38 battery cells were used. How many battery cells are left?
draw a bar model
Answer:→F
There were 28 steel plates in all. 15 steel plates were used. How many steel plates are left?
draw a bar model
Answer:→A
There were 50 battery cells in all. 17 battery cells were used. How many battery cells are left?
draw a bar model
Answer:→E
The red team has 60 copper bolts and the blue team has 25 copper bolts. How many more copper bolts does the red team have?
draw a bar model
Answer:→N
0/7 letters found
Clue 3
Skip counting
The sensor ticks steadily while counting energy pulses in regular intervals.
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
14
45
30
36
18
T
14
70
33
24
24
T
14
18
140
140
30
60
36
120
70
33
T
14
30
55
24
140
55
33
120
24
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, ___, 16, 18T
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, ___, 27, 30S
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, ___, 130, 140Y
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, ___, 65, 70D
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, ___, 150, 160P
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, ___, 80, 90W
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, ___, 39, 42B
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55H
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39A
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, ___, 20, 22O
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65R
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, ___, 35, 40E
0/12 letters found
Clue 4
Addition
Engineers tally up all the spare gear crates scattered near the vault entrance.
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
3696
5325
3061
4487
5116
3637
3061
5917
5116
6344
3051
4914
T
3696
T
3696
3061
7951
6344
3051
5116
5917
7950
7748
4848
6865
6344
7748
8402
9568
3061
5917
4487
5116
2217
8402
3061
6344
1837 + 1859 =T
3946 + 4456 =L
1665 + 1972 =M
1734 + 1317 =P
5347 + 2401 =I
3139 + 1977 =A
3464 + 6104 =V
2475 + 2439 =O
2497 + 2828 =H
746 + 1471 =B
3937 + 2928 =G
2305 + 2543 =N
4407 + 1937 =S
2508 + 5443 =D
1203 + 1858 =E
1548 + 2939 =C
3602 + 4348 =K
3031 + 2886 =R
0/18 letters found
Clue 5
Division facts (1-12) — the last clue
The lead bot divides the remaining battery packs equally among the investigation team.
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
1 ÷ 1 = ?
24 ÷ 2 = ?
30 ÷ 6 = ?
12 ÷ 4 = ?
42 ÷ 6 = ?
8 ÷ 1 = ?
77 ÷ 7 = ?
16 ÷ 4 = ?
24 ÷ 12 = ?
60 ÷ 10 = ?
90 ÷ 9 = ?
Step 2 — cross out the sentence with each answer
1.The villain used magnet grip, then engaged hover drive.
2.The villain activated rocket boost, then switched to night vision.
3.The villain used magnet grip, then turned on stealth mode.
4.The villain used magnet grip, then charged solar panels.
5.The villain raised a plasma shield, then turned on stealth mode.
6.The villain blasted a sonic wave, then engaged hover drive.
7.The villain activated rocket boost, then turned on stealth mode.
8.The villain raised a plasma shield, then revved a turbo engine.
9.The villain blasted a sonic wave, then charged solar panels.
10.The villain activated rocket boost, then engaged hover drive.
11.The villain activated rocket boost, then revved a turbo engine.
12.The villain used magnet grip, then switched to night vision.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Great Gear Heist
Culprit: Cog (Sonic Blast · Solar Panel · Left Antenna Bent · Sparking Silver Cables · Water Sprays)
- Clue 1 (Multiplication facts (1-12)): "THE VILLAIN DOES NOT HAVE A TURBO ENGINE"11 × 2 = 22 (T) · 5 × 5 = 25 (N) · 12 × 12 = 144 (R) · 4 × 10 = 40 (L) · 12 × 6 = 72 (E) · 8 × 11 = 88 (H) · 3 × 9 = 27 (G) · 2 × 9 = 18 (I) · 5 × 11 = 55 (A) · 11 × 3 = 33 (B) · 4 × 7 = 28 (U) · 1 × 7 = 7 (O) · 8 × 3 = 24 (D) · 7 × 9 = 63 (V) · 7 × 5 = 35 (S)
- Clue 2 (Bar model word problems): "LEFT ANTENNA BENT"There were 145 steel plates in all. 18 steel plates were used. How many steel plates are left? = 127 (L) · Cadet Bot has 7 times as many battery cells as a teammate. The teammate has 3 battery cells. How many battery cells does Cadet Bot have? = 21 (B) · Cadet Bot has 220 microchips, packed 5 to a bag. How many bags can be filled? = 44 (T) · There were 154 battery cells in all. 38 battery cells were used. How many battery cells are left? = 116 (F) · There were 28 steel plates in all. 15 steel plates were used. How many steel plates are left? = 13 (A) · There were 50 battery cells in all. 17 battery cells were used. How many battery cells are left? = 33 (E) · The red team has 60 copper bolts and the blue team has 25 copper bolts. How many more copper bolts does the red team have? = 35 (N)
- Clue 3 (Skip counting): "THE BOT WAS STOPPED BY WATER SPRAYS"Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, ___, 16, 18 = 14 (T) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, ___, 27, 30 = 24 (S) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, ___, 130, 140 = 120 (Y) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, ___, 65, 70 = 60 (D) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, ___, 150, 160 = 140 (P) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, ___, 80, 90 = 70 (W) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, ___, 39, 42 = 36 (B) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55 = 45 (H) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39 = 33 (A) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, ___, 20, 22 = 18 (O) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65 = 55 (R) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, ___, 35, 40 = 30 (E)
- Clue 4 (Addition): "THE CAMERA SPOTTED SPARKING SILVER CABLES"1837 + 1859 = 3696 (T) · 3946 + 4456 = 8402 (L) · 1665 + 1972 = 3637 (M) · 1734 + 1317 = 3051 (P) · 5347 + 2401 = 7748 (I) · 3139 + 1977 = 5116 (A) · 3464 + 6104 = 9568 (V) · 2475 + 2439 = 4914 (O) · 2497 + 2828 = 5325 (H) · 746 + 1471 = 2217 (B) · 3937 + 2928 = 6865 (G) · 2305 + 2543 = 4848 (N) · 4407 + 1937 = 6344 (S) · 2508 + 5443 = 7951 (D) · 1203 + 1858 = 3061 (E) · 1548 + 2939 = 4487 (C) · 3602 + 4348 = 7950 (K) · 3031 + 2886 = 5917 (R)
- Clue 5 (Division facts (1-12)): surviving statement (box 9) → Cog1 ÷ 1 = 1 · 24 ÷ 2 = 12 · 30 ÷ 6 = 5 · 12 ÷ 4 = 3 · 42 ÷ 6 = 7 · 8 ÷ 1 = 8 · 77 ÷ 7 = 11 · 16 ÷ 4 = 4 · 24 ÷ 12 = 2 · 60 ÷ 10 = 6 · 90 ÷ 9 = 10
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Multiplication, Bar models, Skip counting, Addition, Division
- Reading level
- grades 3-4
- Theme
- The Great Gear Heist — set in Gearopolis Bot Factory
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects