🤖 RobotsGrade 5Reading: grades 3-4Place valueAdditionSubtractionFractions of a numberDivision

The Great Robo-Factory Glitch

A rogue bot sabotaged the main assembly line at Gear City Bot Works. Solve the math clues to decode the detective notes and expose 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	Primary Tool	Gadget Arm	Antenna Tilt	Wiring Type	System Reset
Friction Fay	Sonic Screwdriver	Solar Panel	Left Tilted Antenna	Silver Braids	Magnet Wipe
Rusty Bolt	Sonic Screwdriver	Rocket Booster	Right Tilted Antenna	Fiber Optics	Oil Splash
Rotor Rita	Plasma Cutter	Solar Panel	Left Tilted Antenna	Fiber Optics	Water Spray
Volt Victor	Hydraulic Gripper	Grappling Hook	Right Tilted Antenna	Silver Braids	Magnet Wipe
Hedy Lamarr	Plasma Cutter	Micro Shield	Right Tilted Antenna	Silver Braids	Oil Splash
Widget Wanda	Electric Drill	Rocket Booster	Right Tilted Antenna	Silver Braids	Magnet Wipe
Cable Cora	Plasma Cutter	Radar Dish	Right Tilted Antenna	Silver Braids	Magnet Wipe
Gimbal Guy	Sonic Screwdriver	Grappling Hook	Left Tilted Antenna	Fiber Optics	Water Spray
Matrix Maya	Sonic Screwdriver	Solar Panel	Right Tilted Antenna	Fiber Optics	Water Spray
Isaac Asimov	Hydraulic Gripper	Solar Panel	Right Tilted Antenna	Silver Braids	Water Spray
Grace Hopper	Laser Welder	Solar Panel	Left Tilted Antenna	Silver Braids	Magnet Wipe
Circuit Clara	Laser Welder	Grappling Hook	Left Tilted Antenna	Copper Cables	Oil Splash
Ada Lovelace	Laser Welder	Grappling Hook	Right Tilted Antenna	Copper Cables	Magnet Wipe
Gearhead Gabe	Laser Welder	Micro Shield	Right Tilted Antenna	Copper Cables	Water Spray
Chip Charlie	Plasma Cutter	Solar Panel	Left Tilted Antenna	Silver Braids	Water Spray
Bolt Benny	Laser Welder	Grappling Hook	Left Tilted Antenna	Fiber Optics	Water Spray
Sprocket Sam	Laser Welder	Micro Shield	Left Tilted Antenna	Silver Braids	Water Spray
Alan Turing	Sonic Screwdriver	Radar Dish	Right Tilted Antenna	Silver Braids	Magnet Wipe
Relay Rose	Plasma Cutter	Grappling Hook	Right Tilted Antenna	Silver Braids	Magnet Wipe
Piston Pete	Sonic Screwdriver	Solar Panel	Right Tilted Antenna	Copper Cables	Water Spray
Dynamo Dave	Plasma Cutter	Grappling Hook	Left Tilted Antenna	Silver Braids	Water Spray

Clue 1

Place value

The digital serial board displayed a scrambled place value 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.

700

900

6000

300

7000

3000

700

900

600

500

300

2000

6000

300

3000

2000

900

700

7000

3000

6000

700

900

What is the value of the 7 in 91,744?T

What is the value of the 5 in 47,754?H

What is the value of the 9 in 35,966?E

What is the value of the 3 in 15,381?A

What is the value of the 3 in 973,465?O

What is the value of the 5 in 483,574?L

What is the value of the 8 in 712,680?R

What is the value of the 2 in 692,575?K

What is the value of the 6 in 88,608?U

What is the value of the 2 in 153,723?C

What is the value of the 7 in 27,482?B

What is the value of the 6 in 56,558?S

0/12 letters found

Clue 2

Addition

We tallied up the total battery cells left in the storage room.

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

4832

4446

6540

2803

2471

2581

5669

4832

5669

2803

5669

2803

6540

2471

2803

5669

6540

4446

6770

6540

2471

5486

6540

7451

6540

6261

2471

5575

4446

7566

6261

6540

2537 + 2295 =W

3525 + 3245 =L

1485 + 986 =E

1167 + 1636 =N

2103 + 4158 =H

3106 + 1340 =I

2628 + 3041 =A

2900 + 4551 =O

4335 + 2205 =T

1657 + 924 =S

2835 + 2740 =R

3513 + 1973 =D

3996 + 3570 =G

0/13 letters found

Clue 3

Subtraction

Subtracting the damaged gears from inventory revealed a secret log.

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

5399

7822

8704

7822

2739

5399

7822

6289

5054

3192

7822

5399

1415

5950

1415

3870

2739

7822

6400

2059

1529

7286

7822

6400

1978

7822

3192

5464

1415

7286

7822

5496 - 97 =D

6406 - 6 =T

7790 - 1840 =M

4642 - 1450 =S

5742 - 4327 =A

8189 - 4319 =G

5141 - 3612 =I

4301 - 2242 =W

10146 - 1442 =F

8555 - 1269 =P

6213 - 4235 =O

8910 - 3856 =U

10592 - 2770 =E

6703 - 414 =R

3733 - 994 =N

9978 - 4514 =C

0/16 letters found

Clue 4

Fractions of a number

A fraction of the charging stations were still active near the lab.

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

1/6 of 78 =S

4/8 of 46 =H

5/10 of 78 =F

5/10 of 38 =A

3/8 of 32 =O

4/5 of 35 =N

1/3 of 33 =D

5/10 of 62 =V

5/10 of 14 =L

4/8 of 34 =E

1/3 of 102 =I

4/10 of 100 =B

4/8 of 42 =R

2/10 of 165 =C

3/10 of 20 =T

0/15 letters found

Clue 5

Division facts (1-12) — the last clue

Dividing the spare bolts equally among bins unlocked the final system file.

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

36 ÷ 12 = ?

66 ÷ 11 = ?

99 ÷ 9 = ?

4 ÷ 1 = ?

24 ÷ 2 = ?

9 ÷ 9 = ?

25 ÷ 5 = ?

18 ÷ 9 = ?

20 ÷ 2 = ?

48 ÷ 6 = ?

36 ÷ 4 = ?

Step 2 — cross out the sentence with each answer

1.The villain fired the plasma cutter, then blasted the rocket booster.

2.The villain buzzed the sonic screwdriver, then raised the micro shield.

3.The villain fired the plasma cutter, then swung from the grappling hook.

4.The villain drilled ahead with the electric drill, then raised the micro shield.

5.The villain clamped with the hydraulic gripper, then blasted the rocket booster.

6.The villain clamped with the hydraulic gripper, then swung from the grappling hook.

7.The villain fired the plasma cutter, then scanned with the radar dish.

8.The villain clamped with the hydraulic gripper, then scanned with the radar dish.

9.The villain buzzed the sonic screwdriver, then blasted the rocket booster.

10.The villain drilled ahead with the electric drill, then charged up the solar panel.

11.The villain buzzed the sonic screwdriver, then scanned with the radar dish.

12.The villain activated the laser welder, then raised the micro shield.

Solve it

Name the culprit

Choose the one suspect left standing.

Answer Key — The Great Robo-Factory Glitch

Culprit: Cable Cora (Plasma Cutter · Radar Dish · Right Tilted Antenna · Silver Braids · Magnet Wipe)

Clue 1 (Place value): "THE SABOTEUR LACKS A ROCKET BOOSTER"
What is the value of the 7 in 91,744? = 700 (T) · What is the value of the 5 in 47,754? = 50 (H) · What is the value of the 9 in 35,966? = 900 (E) · What is the value of the 3 in 15,381? = 300 (A) · What is the value of the 3 in 973,465? = 3000 (O) · What is the value of the 5 in 483,574? = 500 (L) · What is the value of the 8 in 712,680? = 80 (R) · What is the value of the 2 in 692,575? = 2000 (K) · What is the value of the 6 in 88,608? = 600 (U) · What is the value of the 2 in 153,723? = 20 (C) · What is the value of the 7 in 27,482? = 7000 (B) · What is the value of the 6 in 56,558? = 6000 (S)
Clue 2 (Addition): "WITNESS SAW AN ANTENNA TILTED TO THE RIGHT"
2537 + 2295 = 4832 (W) · 3525 + 3245 = 6770 (L) · 1485 + 986 = 2471 (E) · 1167 + 1636 = 2803 (N) · 2103 + 4158 = 6261 (H) · 3106 + 1340 = 4446 (I) · 2628 + 3041 = 5669 (A) · 2900 + 4551 = 7451 (O) · 4335 + 2205 = 6540 (T) · 1657 + 924 = 2581 (S) · 2835 + 2740 = 5575 (R) · 3513 + 1973 = 5486 (D) · 3996 + 3570 = 7566 (G)
Clue 3 (Subtraction): "DEFENDER USED A MAGNET WIPE TO ESCAPE"
5496 - 97 = 5399 (D) · 6406 - 6 = 6400 (T) · 7790 - 1840 = 5950 (M) · 4642 - 1450 = 3192 (S) · 5742 - 4327 = 1415 (A) · 8189 - 4319 = 3870 (G) · 5141 - 3612 = 1529 (I) · 4301 - 2242 = 2059 (W) · 10146 - 1442 = 8704 (F) · 8555 - 1269 = 7286 (P) · 6213 - 4235 = 1978 (O) · 8910 - 3856 = 5054 (U) · 10592 - 2770 = 7822 (E) · 6703 - 414 = 6289 (R) · 3733 - 994 = 2739 (N) · 9978 - 4514 = 5464 (C)
Clue 4 (Fractions of a number): "SCENE HAD STRANDS OF SILVER BRAIDS"
1/6 of 78 = 13 (S) · 4/8 of 46 = 23 (H) · 5/10 of 78 = 39 (F) · 5/10 of 38 = 19 (A) · 3/8 of 32 = 12 (O) · 4/5 of 35 = 28 (N) · 1/3 of 33 = 11 (D) · 5/10 of 62 = 31 (V) · 5/10 of 14 = 7 (L) · 4/8 of 34 = 17 (E) · 1/3 of 102 = 34 (I) · 4/10 of 100 = 40 (B) · 4/8 of 42 = 21 (R) · 2/10 of 165 = 33 (C) · 3/10 of 20 = 6 (T)
Clue 5 (Division facts (1-12)): surviving statement (box 7) → Cable Cora
36 ÷ 12 = 3 · 66 ÷ 11 = 6 · 99 ÷ 9 = 11 · 4 ÷ 1 = 4 · 24 ÷ 2 = 12 · 9 ÷ 9 = 1 · 25 ÷ 5 = 5 · 18 ÷ 9 = 2 · 20 ÷ 2 = 10 · 48 ÷ 6 = 8 · 36 ÷ 4 = 9

About this mystery

Grade level: Grade 5 math
Math topics: Place value, Addition, Subtraction, Fractions of a number, Division
Reading level: grades 3-4
Theme: The Great Robo-Factory Glitch — set in Gear City Bot Works
Format: Interactive online & printable worksheet with answer key
Solution: One unique, verified culprit among 21 suspects

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