🤖 RobotsGrade 5Reading: grades 3-4MultiplicationFractions of a numberOrder of operationsRoundingDivision
The Mystery of the Mischievous Bot
A sneaky robot snuck into the Gear City Factory and scrambled the blueprints! The Chief Inventor needs your help to decode clues, analyze evidence, and figure out which rogue bot caused the chaos.
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 | Secondary Gadget | Sensor Hand | Antenna Color | Defensive Counter |
|---|---|---|---|---|---|
| Titan | rocket boots | radar dish | right hand sensor | red antenna | water cannon |
| Nano | laser torch | EMP jammer | left hand sensor | red antenna | foam blaster |
| Beep | grappling hook | oil sprayer | left hand sensor | red antenna | water cannon |
| Data | grappling hook | shield generator | right hand sensor | blue antenna | magnet beam |
| Echo | sonic boom | shield generator | left hand sensor | red antenna | water cannon |
| Gears | laser torch | shield generator | left hand sensor | red antenna | water cannon |
| Vortex | plasma welder | shield generator | left hand sensor | blue antenna | magnet beam |
| Omega | sonic boom | oil sprayer | right hand sensor | red antenna | foam blaster |
| Bolt | sonic boom | strobe light | right hand sensor | yellow antenna | water cannon |
| Sparky | plasma welder | strobe light | left hand sensor | blue antenna | water cannon |
| Matrix | grappling hook | oil sprayer | left hand sensor | blue antenna | magnet beam |
| Sprocket | laser torch | shield generator | left hand sensor | yellow antenna | magnet beam |
| Gizmo | laser torch | strobe light | left hand sensor | red antenna | foam blaster |
| Atlas | rocket boots | EMP jammer | right hand sensor | blue antenna | magnet beam |
| Boop | grappling hook | oil sprayer | left hand sensor | blue antenna | foam blaster |
| Flux | laser torch | radar dish | left hand sensor | red antenna | foam blaster |
| Circuit | laser torch | EMP jammer | right hand sensor | yellow antenna | magnet beam |
| Cipher | plasma welder | shield generator | left hand sensor | red antenna | water cannon |
| Widget | sonic boom | oil sprayer | left hand sensor | yellow antenna | foam blaster |
| Chip | plasma welder | radar dish | left hand sensor | red antenna | water cannon |
| Rust-E | plasma welder | EMP jammer | left hand sensor | blue antenna | magnet beam |
Clue 1
Multiplication facts (1-12)
Technician Sparky counts the rows of spare robot batteries on the assembly line.
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
66
120
28
12
30
2
2
14
30
48
15
49
28
144
48
49
T
66
120
14
12
28
14
48
49
30
2
144
99
81
14
50
28
81
6 × 11 =T
12 × 12 =S
3 × 5 =D
10 × 12 =H
2 × 1 =L
6 × 2 =V
7 × 2 =A
7 × 4 =E
5 × 10 =Y
9 × 11 =P
6 × 8 =N
9 × 9 =R
5 × 6 =I
7 × 7 =O
0/14 letters found
Clue 2
Fractions of a number
Sparky checks what fraction of the charging station grid is active.
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
29
40
39
25
4
17
17
17
15
W
29
15
32
4
33
39
13
15
25
11
17
4
25
17
37
24
1/2 of 58 =W
1/5 of 125 =N
1/10 of 130 =H
1/4 of 132 =F
1/8 of 192 =R
5/10 of 74 =O
1/5 of 85 =S
2/8 of 128 =L
6/10 of 25 =A
2/6 of 117 =T
1/4 of 44 =D
1/3 of 120 =I
1/6 of 24 =E
0/13 letters found
Clue 3
Order of operations
Sparky follows a step-by-step repair code to reset the workshop console.
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
56
67
48
76
41
33
33
12
41
23
20
12
45
45
T
56
78
68
68
48
54
26
8
12
20
12
T
56
48
19
50
12
23
23
78
23
12 × 5 - 4 =T
18 + 9 × 4 =D
15 + 9 × 2 =L
44 + 4 × 8 =V
7 × 8 - 30 =B
4 + 2 × 2 =Y
36 + 3 × 3 =S
9 × 9 - 3 =O
14 + 3 × 9 =I
4 + 4 × 4 =W
5 × 6 - 7 =N
6 × 4 - 5 =R
3 + 3 × 3 =A
29 + 3 × 7 =C
39 + 4 × 7 =H
28 + 5 × 4 =E
8 × 11 - 20 =P
0/17 letters found
Clue 4
Rounding
The workshop scanner screen rounds the total energy reading to the nearest hundred.
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
230
2000
110
700
E
230
1700
20
E
230
3700
500
200
9000
3700
300
30
E
230
700
300
1700
1300
E
230
1700
1700
300
9000
300
3700
130
E
230
4300
1300
Round 229 to the nearest tenE
Round 1,714 to the nearest thousandV
Round 513 to the nearest hundredH
Round 129 to the nearest tenL
Round 1,689 to the nearest hundredN
Round 110 to the nearest tenI
Round 4,345 to the nearest hundredF
Round 251 to the nearest hundredA
Round 1,320 to the nearest hundredT
Round 9,241 to the nearest thousandW
Round 698 to the nearest hundredD
Round 3,749 to the nearest hundredS
Round 167 to the nearest hundredO
Round 28 to the nearest tenR
Round 17 to the nearest tenC
0/15 letters found
Clue 5
Division facts (1-12) — the last clue
Sparky divides the shiny steel gears evenly among the repair stations.
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
18 ÷ 3 = ?
20 ÷ 5 = ?
2 ÷ 1 = ?
60 ÷ 5 = ?
27 ÷ 3 = ?
30 ÷ 6 = ?
3 ÷ 1 = ?
64 ÷ 8 = ?
77 ÷ 11 = ?
12 ÷ 12 = ?
20 ÷ 2 = ?
Step 2 — cross out the sentence with each answer
1.The villain fired a laser torch, then squirted an oil sprayer.
2.The villain fired a laser torch, then turned on a shield generator.
3.The villain launched a grappling hook, then jammed signals with an EMP.
4.The villain sparked a plasma welder, then turned on a shield generator.
5.The villain blasted a sonic boom, then jammed signals with an EMP.
6.The villain sparked a plasma welder, then scanned with a radar dish.
7.The villain launched a grappling hook, then scanned with a radar dish.
8.The villain blasted a sonic boom, then squirted an oil sprayer.
9.The villain boosted on rocket boots, then squirted an oil sprayer.
10.The villain boosted on rocket boots, then jammed signals with an EMP.
11.The villain blasted a sonic boom, then turned on a shield generator.
12.The villain boosted on rocket boots, then turned on a shield generator.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Mystery of the Mischievous Bot
Culprit: Echo (sonic boom · shield generator · left hand sensor · red antenna · water cannon)
- Clue 1 (Multiplication facts (1-12)): "THE VILLAIN DOES NOT HAVE AN OIL SPRAYER"6 × 11 = 66 (T) · 12 × 12 = 144 (S) · 3 × 5 = 15 (D) · 10 × 12 = 120 (H) · 2 × 1 = 2 (L) · 6 × 2 = 12 (V) · 7 × 2 = 14 (A) · 7 × 4 = 28 (E) · 5 × 10 = 50 (Y) · 9 × 11 = 99 (P) · 6 × 8 = 48 (N) · 9 × 9 = 81 (R) · 5 × 6 = 30 (I) · 7 × 7 = 49 (O)
- Clue 2 (Fractions of a number): "WITNESS SAW A LEFT HAND SENSOR"1/2 of 58 = 29 (W) · 1/5 of 125 = 25 (N) · 1/10 of 130 = 13 (H) · 1/4 of 132 = 33 (F) · 1/8 of 192 = 24 (R) · 5/10 of 74 = 37 (O) · 1/5 of 85 = 17 (S) · 2/8 of 128 = 32 (L) · 6/10 of 25 = 15 (A) · 2/6 of 117 = 39 (T) · 1/4 of 44 = 11 (D) · 1/3 of 120 = 40 (I) · 1/6 of 24 = 4 (E)
- Clue 3 (Order of operations): "THE VILLAIN WAS STOPPED BY A WATER CANNON"12 × 5 - 4 = 56 (T) · 18 + 9 × 4 = 54 (D) · 15 + 9 × 2 = 33 (L) · 44 + 4 × 8 = 76 (V) · 7 × 8 - 30 = 26 (B) · 4 + 2 × 2 = 8 (Y) · 36 + 3 × 3 = 45 (S) · 9 × 9 - 3 = 78 (O) · 14 + 3 × 9 = 41 (I) · 4 + 4 × 4 = 20 (W) · 5 × 6 - 7 = 23 (N) · 6 × 4 - 5 = 19 (R) · 3 + 3 × 3 = 12 (A) · 29 + 3 × 7 = 50 (C) · 39 + 4 × 7 = 67 (H) · 28 + 5 × 4 = 48 (E) · 8 × 11 - 20 = 68 (P)
- Clue 4 (Rounding): "EVIDENCE SHOWS A RED ANTENNA WAS LEFT"Round 229 to the nearest ten = 230 (E) · Round 1,714 to the nearest thousand = 2000 (V) · Round 513 to the nearest hundred = 500 (H) · Round 129 to the nearest ten = 130 (L) · Round 1,689 to the nearest hundred = 1700 (N) · Round 110 to the nearest ten = 110 (I) · Round 4,345 to the nearest hundred = 4300 (F) · Round 251 to the nearest hundred = 300 (A) · Round 1,320 to the nearest hundred = 1300 (T) · Round 9,241 to the nearest thousand = 9000 (W) · Round 698 to the nearest hundred = 700 (D) · Round 3,749 to the nearest hundred = 3700 (S) · Round 167 to the nearest hundred = 200 (O) · Round 28 to the nearest ten = 30 (R) · Round 17 to the nearest ten = 20 (C)
- Clue 5 (Division facts (1-12)): surviving statement (box 11) → Echo18 ÷ 3 = 6 · 20 ÷ 5 = 4 · 2 ÷ 1 = 2 · 60 ÷ 5 = 12 · 27 ÷ 3 = 9 · 30 ÷ 6 = 5 · 3 ÷ 1 = 3 · 64 ÷ 8 = 8 · 77 ÷ 11 = 7 · 12 ÷ 12 = 1 · 20 ÷ 2 = 10
About this mystery
- Grade level
- Grade 5 math
- Math topics
- Multiplication, Fractions of a number, Order of operations, Rounding, Division
- Reading level
- grades 3-4
- Theme
- The Mystery of the Mischievous Bot — set in The High-Tech Robot Factory of Gear City
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects