🤖 RobotsGrade 3Reading: grades 3-4MultiplicationSkip countingWord problemsRoundingMissing addends
The Circuit City Caper
A wild Glitch Bot has broken into the Central Core and scrambled the grid blueprints! The Chief Mechanic needs your help to scan the robotic suspects and find the culprit before the whole city powers down.
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 Tool | Backup Gadget | Claw Grip | Dome Wire Color | System Vulnerability |
|---|---|---|---|---|---|
| Volt | rocket booster | shock wave | Right clawed grip | blue wire | magnet fields |
| Hal | magnet arm | bubble shield | Left clawed grip | orange wire | water splashes |
| Bumblebee | plasma torch | solar panel | Right clawed grip | blue wire | dust bunnies |
| Zippy | rocket booster | oil slicker | Left clawed grip | blue wire | dust bunnies |
| Gizmo | magnet arm | decoy drone | Left clawed grip | blue wire | magnet fields |
| Tinman | rocket booster | bubble shield | Right clawed grip | blue wire | dust bunnies |
| Clank | laser welder | decoy drone | Right clawed grip | green wire | magnet fields |
| Astro | magnet arm | bubble shield | Right clawed grip | blue wire | magnet fields |
| Optimus | magnet arm | decoy drone | Right clawed grip | blue wire | water splashes |
| Sparky | sonic drill | oil slicker | Left clawed grip | orange wire | dust bunnies |
| Baymax | sonic drill | bubble shield | Right clawed grip | orange wire | magnet fields |
| Rodney | sonic drill | shock wave | Right clawed grip | blue wire | magnet fields |
| Gearbox | magnet arm | decoy drone | Left clawed grip | blue wire | dust bunnies |
| Sprocket | sonic drill | solar panel | Right clawed grip | orange wire | water splashes |
| Rosie | laser welder | bubble shield | Left clawed grip | orange wire | magnet fields |
| Piper | sonic drill | bubble shield | Left clawed grip | blue wire | dust bunnies |
| Pixel | rocket booster | solar panel | Left clawed grip | green wire | magnet fields |
| Beep | magnet arm | decoy drone | Right clawed grip | orange wire | dust bunnies |
| Data | rocket booster | decoy drone | Left clawed grip | blue wire | dust bunnies |
| Rusty | sonic drill | bubble shield | Left clawed grip | blue wire | water splashes |
| Widget | sonic drill | shock wave | Left clawed grip | blue wire | dust bunnies |
Clue 1
Multiplication facts (1-12)
To decrypt the security log, we must count the charging pods lined up 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
48
30
1
60
8
42
T
48
55
30
70
50
T
48
120
50
1
21
24
50
T
48
35
21
1
33
21
30
50
55
77
72
33
18
1
4 × 12 =T
7 × 6 =I
7 × 5 =U
12 × 10 =D
5 × 11 =C
1 × 8 =L
10 × 5 =O
5 × 12 =G
7 × 10 =B
4 × 6 =N
5 × 6 =H
1 × 1 =E
2 × 9 =V
9 × 8 =W
11 × 7 =K
11 × 3 =A
7 × 3 =S
0/17 letters found
Clue 2
Skip counting
The scrap yard elevator only moves when we count the teeth on these spinning gears.
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
10
36
9
28
70
28
24
9
80
T
10
18
42
27
40
28
45
39
T
10
36
27
26
9
60
T
10
80
26
27
45
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14T
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, ___, 28, 30L
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, ___, 30, 32S
Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15E
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, ___, 70, 80F
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, ___, 39, 42H
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, ___, 27, 30P
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, ___, 21, 24G
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, ___, 90, 100C
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33A
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55W
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, ___, 42, 45I
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, ___, 80, 90U
Skip-count by 10s. Fill the blank: 10, 20, 30, ___, 50, 60B
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, ___, 45, 48R
0/15 letters found
Clue 3
Word problems
We found a box of spare batteries. Let us calculate how many the helper bots used today.
Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.
Someonescaredthevillainoffwith .
D
37
56
74
12
33
56
30
30
76
E
74
Mechanic bot found 10 energy cells yesterday and 27 more today. How many energy cells in all?D
Mechanic bot found 56 copper bolts yesterday and 20 more today. How many copper bolts in all?I
There were 36 microchips. 3 were used up. How many microchips are left?B
Mechanic bot found 8 energy cells yesterday and 4 more today. How many energy cells in all?T
There were 90 energy cells. 16 were used up. How many energy cells are left?S
There were 89 rusty springs. 33 were used up. How many rusty springs are left?U
Mechanic bot lined up 10 rows of 3 energy cells. How many energy cells in all?N
0/7 letters found
Clue 4
Rounding
The power grid radar only displays total energy levels rounded to the nearest ten.
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
80
60
6000
3000
400
90
500
40
8000
70
400
60
W
80
600
20
60
40
9000
9000
7000
60
700
3000
20
60
Round 77 to the nearest tenW
Round 39 to the nearest tenA
Round 464 to the nearest hundredD
Round 68 to the nearest tenL
Round 7,303 to the nearest thousandH
Round 598 to the nearest hundredI
Round 6,480 to the nearest thousandF
Round 8,394 to the nearest thousandB
Round 56 to the nearest tenE
Round 731 to the nearest hundredC
Round 19 to the nearest tenR
Round 2,624 to the nearest thousandO
Round 92 to the nearest tenN
Round 9,341 to the nearest thousandT
Round 393 to the nearest hundredU
0/15 letters found
Clue 5
Missing addends — the last clue
Some power cells are missing from the rack. Help the dock worker find the missing amount.
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
5 + ___ = 14
8 + ___ = 9
2 + ___ = 12
2 + ___ = 10
1 + ___ = 13
6 + ___ = 11
6 + ___ = 17
1 + ___ = 5
5 + ___ = 7
4 + ___ = 10
3 + ___ = 6
Step 2 — cross out the sentence with each answer
1.The villain fires the rocket booster to breach the ceiling, then sprays an oil slicker to slide away.
2.The villain uses the laser welder to cut the safe, then sprays an oil slicker to slide away.
3.The villain uses the laser welder to cut the safe, then unfolds a solar panel to recharge its core.
4.The villain uses the laser welder to cut the safe, then deploys a bubble shield to block the alarms.
5.The villain blasts a plasma torch at the lock, then deploys a bubble shield to block the alarms.
6.The villain fires the rocket booster to breach the ceiling, then deploys a bubble shield to block the alarms.
7.The villain fires the rocket booster to breach the ceiling, then launches a decoy drone to confuse the sensors.
8.The villain uses the laser welder to cut the safe, then releases a shock wave to stun the guards.
9.The villain revs the sonic drill to break the floor, then deploys a bubble shield to block the alarms.
10.The villain activates the magnet arm to lift the vault door, then launches a decoy drone to confuse the sensors.
11.The villain activates the magnet arm to lift the vault door, then unfolds a solar panel to recharge its core.
12.The villain activates the magnet arm to lift the vault door, then releases a shock wave to stun the guards.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Circuit City Caper
Culprit: Data (rocket booster · decoy drone · Left clawed grip · blue wire · dust bunnies)
- Clue 1 (Multiplication facts (1-12)): "THE GLITCH BOT DOES NOT USE A SHOCK WAVE"4 × 12 = 48 (T) · 7 × 6 = 42 (I) · 7 × 5 = 35 (U) · 12 × 10 = 120 (D) · 5 × 11 = 55 (C) · 1 × 8 = 8 (L) · 10 × 5 = 50 (O) · 5 × 12 = 60 (G) · 7 × 10 = 70 (B) · 4 × 6 = 24 (N) · 5 × 6 = 30 (H) · 1 × 1 = 1 (E) · 2 × 9 = 18 (V) · 9 × 8 = 72 (W) · 11 × 7 = 77 (K) · 11 × 3 = 33 (A) · 7 × 3 = 21 (S)
- Clue 2 (Skip counting): "THE SUSPECT GRABS WITH A LEFT CLAW"Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14 = 10 (T) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, ___, 28, 30 = 26 (L) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, ___, 30, 32 = 28 (S) · Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15 = 9 (E) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, ___, 70, 80 = 60 (F) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, ___, 39, 42 = 36 (H) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, ___, 27, 30 = 24 (P) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, ___, 21, 24 = 18 (G) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, ___, 90, 100 = 80 (C) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33 = 27 (A) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55 = 45 (W) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, ___, 42, 45 = 39 (I) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, ___, 80, 90 = 70 (U) · Skip-count by 10s. Fill the blank: 10, 20, 30, ___, 50, 60 = 40 (B) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, ___, 45, 48 = 42 (R)
- Clue 3 (Word problems): "DUST BUNNIES"Mechanic bot found 10 energy cells yesterday and 27 more today. How many energy cells in all? = 37 (D) · Mechanic bot found 56 copper bolts yesterday and 20 more today. How many copper bolts in all? = 76 (I) · There were 36 microchips. 3 were used up. How many microchips are left? = 33 (B) · Mechanic bot found 8 energy cells yesterday and 4 more today. How many energy cells in all? = 12 (T) · There were 90 energy cells. 16 were used up. How many energy cells are left? = 74 (S) · There were 89 rusty springs. 33 were used up. How many rusty springs are left? = 56 (U) · Mechanic bot lined up 10 rows of 3 energy cells. How many energy cells in all? = 30 (N)
- Clue 4 (Rounding): "WE FOUND A BLUE WIRE AT THE CORE"Round 77 to the nearest ten = 80 (W) · Round 39 to the nearest ten = 40 (A) · Round 464 to the nearest hundred = 500 (D) · Round 68 to the nearest ten = 70 (L) · Round 7,303 to the nearest thousand = 7000 (H) · Round 598 to the nearest hundred = 600 (I) · Round 6,480 to the nearest thousand = 6000 (F) · Round 8,394 to the nearest thousand = 8000 (B) · Round 56 to the nearest ten = 60 (E) · Round 731 to the nearest hundred = 700 (C) · Round 19 to the nearest ten = 20 (R) · Round 2,624 to the nearest thousand = 3000 (O) · Round 92 to the nearest ten = 90 (N) · Round 9,341 to the nearest thousand = 9000 (T) · Round 393 to the nearest hundred = 400 (U)
- Clue 5 (Missing addends): surviving statement (box 7) → Data5 + ___ = 14 = 9 · 8 + ___ = 9 = 1 · 2 + ___ = 12 = 10 · 2 + ___ = 10 = 8 · 1 + ___ = 13 = 12 · 6 + ___ = 11 = 5 · 6 + ___ = 17 = 11 · 1 + ___ = 5 = 4 · 5 + ___ = 7 = 2 · 4 + ___ = 10 = 6 · 3 + ___ = 6 = 3
About this mystery
- Grade level
- Grade 3 math
- Math topics
- Multiplication, Skip counting, Word problems, Rounding, Missing addends
- Reading level
- grades 3-4
- Theme
- The Circuit City Caper — set in The Circuit City Central Core
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects