🤖 RobotsGrade 4Reading: grades 3-4RoundingAdditionSubtractionMultiplicationDivision

The Runaway Robot Riddle

Oh no! A rogue bot has escaped from the repair bay and scrambled the main control system. We need to track it down before it causes more mischief around the factory!

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 Gear	LED Color	Antenna Style	System Vulnerability
Alan	Plasma Cutter	Smoke Screen	Yellow Glow	Star Sensor	Rust Spray
Clank	Magnet Grip	Force Field	Yellow Glow	Star Sensor	Magnet Wave
Copper	Sonic Drill	Force Field	Blue Glow	Dish Receiver	Magnet Wave
Ada	Magnet Grip	Siren Horn	Yellow Glow	Dish Receiver	Magnet Wave
Sparky	Plasma Cutter	Force Field	Yellow Glow	Dish Receiver	Magnet Wave
Robbie	Laser Welder	Turbo Booster	Blue Glow	Star Sensor	Static Shock
Circuit	Nano Wrench	Force Field	Blue Glow	Dish Receiver	Rust Spray
Gizmo	Laser Welder	Glitch Beam	Yellow Glow	Coil Wire	Static Shock
Vector	Plasma Cutter	Force Field	Blue Glow	Star Sensor	Rust Spray
Gears	Magnet Grip	Smoke Screen	Blue Glow	Dish Receiver	Magnet Wave
Pixel	Laser Welder	Force Field	Yellow Glow	Dish Receiver	Magnet Wave
Optimus	Sonic Drill	Glitch Beam	Yellow Glow	Dish Receiver	Magnet Wave
Zuma	Sonic Drill	Turbo Booster	Yellow Glow	Dish Receiver	Magnet Wave
Booster	Magnet Grip	Glitch Beam	Blue Glow	Dish Receiver	Magnet Wave
Bolt	Nano Wrench	Turbo Booster	Yellow Glow	Dish Receiver	Static Shock
Isaac	Sonic Drill	Turbo Booster	Blue Glow	Star Sensor	Rust Spray
Byte	Nano Wrench	Force Field	Yellow Glow	Dish Receiver	Static Shock
Rosie	Plasma Cutter	Glitch Beam	Blue Glow	Star Sensor	Rust Spray
Tinny	Laser Welder	Siren Horn	Yellow Glow	Star Sensor	Magnet Wave
Beep	Sonic Drill	Force Field	Yellow Glow	Dish Receiver	Rust Spray
Geary	Plasma Cutter	Smoke Screen	Yellow Glow	Coil Wire	Static Shock

Clue 1

Rounding

The lab radar scans for heavy bots, but its screen only shows rounded weights. Round the numbers on the radar to reveal the first scrap of code!

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

290

200

700

9000

290

5000

9000

430

3000

9000

290

2300

430

1300

110

2000

290

1700

200

700

170

300

Round 286 to the nearest tenT

Round 8,735 to the nearest thousandO

Round 4,924 to the nearest thousandD

Round 689 to the nearest hundredB

Round 284 to the nearest hundredM

Round 73 to the nearest tenE

Round 156 to the nearest hundredH

Round 3,360 to the nearest thousandN

Round 2,364 to the nearest thousandI

Round 428 to the nearest tenS

Round 171 to the nearest tenA

Round 2,318 to the nearest hundredU

Round 1,343 to the nearest hundredG

Round 107 to the nearest tenL

Round 1,748 to the nearest hundredC

0/15 letters found

Clue 2

Addition

To open the locked storage bin, we must total up all the spare copper wires we found. Add the wire counts together to unlock the security camera!

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

6434

8948

2683

4990

4818

3875

9077

4990

4818

3875

6434

2060

4990

2683

7724

6319

4818

6439

6319

3157

2683

3875

6434

4990

4134 + 2300 =A

2046 + 2772 =O

2254 + 4065 =T

1542 + 2333 =W

1157 + 903 =S

3144 + 4580 =F

975 + 2182 =H

1623 + 1060 =E

3684 + 2755 =N

2272 + 2718 =L

3552 + 5525 =G

2863 + 6085 =Y

0/12 letters found

Clue 3

Subtraction

A rogue bot drained some power cells! Find out how much energy is missing by subtracting the leftover power from the starting amount.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

4933

1950

4896

5838

6880

8307

6965

6151

4933

6965

8307

4864

4896

4523

4933

5690

4864

1950

4896

6880

2227

1950

4896

7222

4864

1791

6880

4896

7783 - 2850 =A

5501 - 3710 =B

8401 - 1521 =O

6171 - 1648 =W

5162 - 3212 =S

8458 - 1236 =H

10757 - 3792 =G

6495 - 4268 =P

9010 - 4114 =T

9413 - 3723 =V

5854 - 990 =E

6960 - 809 =M

9924 - 1617 =N

10400 - 4562 =R

0/14 letters found

Clue 4

Multiplication facts (1-12)

The workbench has several boxes of replacement microchips. Multiply the boxes by the chips inside each box to trace the 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.

108

132

110

108

132

9 × 12 =A

5 × 7 =F

2 × 3 =W

1 × 1 =E

4 × 7 =V

11 × 10 =C

3 × 5 =H

3 × 7 =R

11 × 12 =S

9 × 8 =B

11 × 6 =D

8 × 12 =N

2 × 11 =T

9 × 6 =L

10 × 9 =I

0/15 letters found

Clue 5

Division facts (1-12) — the last clue

We need to share the backup battery packs equally among our search drones. Divide the batteries to crack the bot's final frequency!

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

44 ÷ 4 = ?

16 ÷ 8 = ?

28 ÷ 7 = ?

12 ÷ 2 = ?

9 ÷ 3 = ?

96 ÷ 8 = ?

108 ÷ 12 = ?

56 ÷ 7 = ?

120 ÷ 12 = ?

35 ÷ 7 = ?

70 ÷ 10 = ?

Step 2 — cross out the sentence with each answer

1.The villain melted the metal vault lock, then blocked the hallway with a shimmering wall.

2.The villain tunneled beneath the secure concrete floor, then zoomed away at top speed.

3.The villain melted the metal vault lock, then corrupted the security camera feed.

4.The villain sliced through the heavy steel beams, then blocked the hallway with a shimmering wall.

5.The villain tunneled beneath the secure concrete floor, then hid the escape path in dark fumes.

6.The villain melted the metal vault lock, then zoomed away at top speed.

7.The villain tunneled beneath the secure concrete floor, then corrupted the security camera feed.

8.The villain sliced through the heavy steel beams, then zoomed away at top speed.

9.The villain sliced through the heavy steel beams, then corrupted the security camera feed.

10.The villain unscrewed the main control panel, then scared the guard dogs with a loud beep.

11.The villain yanked the iron door off its hinges, then scared the guard dogs with a loud beep.

12.The villain yanked the iron door off its hinges, then hid the escape path in dark fumes.

Solve it

Name the culprit

Choose the one suspect left standing.

Answer Key — The Runaway Robot Riddle

Culprit: Pixel (Laser Welder · Force Field · Yellow Glow · Dish Receiver · Magnet Wave)

Clue 1 (Rounding): "THE BOT DOES NOT USE GLITCH BEAM"
Round 286 to the nearest ten = 290 (T) · Round 8,735 to the nearest thousand = 9000 (O) · Round 4,924 to the nearest thousand = 5000 (D) · Round 689 to the nearest hundred = 700 (B) · Round 284 to the nearest hundred = 300 (M) · Round 73 to the nearest ten = 70 (E) · Round 156 to the nearest hundred = 200 (H) · Round 3,360 to the nearest thousand = 3000 (N) · Round 2,364 to the nearest thousand = 2000 (I) · Round 428 to the nearest ten = 430 (S) · Round 171 to the nearest ten = 170 (A) · Round 2,318 to the nearest hundred = 2300 (U) · Round 1,343 to the nearest hundred = 1300 (G) · Round 107 to the nearest ten = 110 (L) · Round 1,748 to the nearest hundred = 1700 (C)
Clue 2 (Addition): "A YELLOW GLOW WAS LEFT ON THE WALL"
4134 + 2300 = 6434 (A) · 2046 + 2772 = 4818 (O) · 2254 + 4065 = 6319 (T) · 1542 + 2333 = 3875 (W) · 1157 + 903 = 2060 (S) · 3144 + 4580 = 7724 (F) · 975 + 2182 = 3157 (H) · 1623 + 1060 = 2683 (E) · 3684 + 2755 = 6439 (N) · 2272 + 2718 = 4990 (L) · 3552 + 5525 = 9077 (G) · 2863 + 6085 = 8948 (Y)
Clue 3 (Subtraction): "A STRONG MAGNET WAVE STOPS THE BOT"
7783 - 2850 = 4933 (A) · 5501 - 3710 = 1791 (B) · 8401 - 1521 = 6880 (O) · 6171 - 1648 = 4523 (W) · 5162 - 3212 = 1950 (S) · 8458 - 1236 = 7222 (H) · 10757 - 3792 = 6965 (G) · 6495 - 4268 = 2227 (P) · 9010 - 4114 = 4896 (T) · 9413 - 3723 = 5690 (V) · 5854 - 990 = 4864 (E) · 6960 - 809 = 6151 (M) · 9924 - 1617 = 8307 (N) · 10400 - 4562 = 5838 (R)
Clue 4 (Multiplication facts (1-12)): "A DISH RECEIVER WAS LEFT BEHIND"
9 × 12 = 108 (A) · 5 × 7 = 35 (F) · 2 × 3 = 6 (W) · 1 × 1 = 1 (E) · 4 × 7 = 28 (V) · 11 × 10 = 110 (C) · 3 × 5 = 15 (H) · 3 × 7 = 21 (R) · 11 × 12 = 132 (S) · 9 × 8 = 72 (B) · 11 × 6 = 66 (D) · 8 × 12 = 96 (N) · 2 × 11 = 22 (T) · 9 × 6 = 54 (L) · 10 × 9 = 90 (I)
Clue 5 (Division facts (1-12)): surviving statement (box 1) → Pixel
44 ÷ 4 = 11 · 16 ÷ 8 = 2 · 28 ÷ 7 = 4 · 12 ÷ 2 = 6 · 9 ÷ 3 = 3 · 96 ÷ 8 = 12 · 108 ÷ 12 = 9 · 56 ÷ 7 = 8 · 120 ÷ 12 = 10 · 35 ÷ 7 = 5 · 70 ÷ 10 = 7

About this mystery

Grade level: Grade 4 math
Math topics: Rounding, Addition, Subtraction, Multiplication, Division
Reading level: grades 3-4
Theme: The Runaway Robot Riddle — set in The Robo-Bytes Repair Bay
Format: Interactive online & printable worksheet with answer key
Solution: One unique, verified culprit among 21 suspects

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