🤖 Unicorns, RobotsGrade 4Reading: grades 3-4RoundingAdditionSubtractionMultiplicationDivision

The Cyber-Pasture Mystery

A rogue cyber-unicorn has broken into the Sparkle-Core Laboratory and stolen the Master Glitter-Drive! We must scan the tracks and check the power logs to find out which unit did it before the power grid crashes.

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 Spark-Ability	Backup Gear	Hoof System	Mane Material	System Vulnerability
Star Hopper	Laser-Horn Beam	Neon-Flash	Right-hoof dominant	Chrome Mane	Rust-Dust
Bolt Hopper	Electro-Shield	Gear-Bite	Right-hoof dominant	Fiber-Optic Mane	Water-Sprays
Circuit Buttercup	Sonic Neigh	Gear-Bite	Right-hoof dominant	Copper Mane	Water-Sprays
Zenith Mane	Rainbow-Jet Dash	Glow-Tail Whip	Right-hoof dominant	Copper Mane	Water-Sprays
Gear Celeste	Laser-Horn Beam	Cyber-Wings	Right-hoof dominant	Chrome Mane	Water-Sprays
Sprite Silicon	Electro-Shield	Spark-Missile	Right-hoof dominant	Copper Mane	Water-Sprays
Dynamo Puff	Sonic Neigh	Gear-Bite	Left-hoof dominant	Fiber-Optic Mane	Water-Sprays
Alan Glitter	Plasma-Hoof Stomp	Neon-Flash	Left-hoof dominant	Copper Mane	Water-Sprays
Robo Jewel	Laser-Horn Beam	Cyber-Wings	Right-hoof dominant	Fiber-Optic Mane	Water-Sprays
Matrix Nova	Plasma-Hoof Stomp	Cyber-Wings	Left-hoof dominant	Copper Mane	Water-Sprays
Vector Star	Rainbow-Jet Dash	Cyber-Wings	Right-hoof dominant	Copper Mane	Water-Sprays
Curie Flash	Sonic Neigh	Gear-Bite	Right-hoof dominant	Fiber-Optic Mane	Water-Sprays
Nebula Horn	Rainbow-Jet Dash	Glow-Tail Whip	Right-hoof dominant	Fiber-Optic Mane	Magnets
Glimmer Byte	Rainbow-Jet Dash	Glow-Tail Whip	Right-hoof dominant	Fiber-Optic Mane	Water-Sprays
Cyber Onyx	Sonic Neigh	Cyber-Wings	Left-hoof dominant	Fiber-Optic Mane	Water-Sprays
Gizmo Twinkle	Plasma-Hoof Stomp	Gear-Bite	Right-hoof dominant	Chrome Mane	Water-Sprays
Sparky Lovelace	Laser-Horn Beam	Neon-Flash	Right-hoof dominant	Fiber-Optic Mane	Water-Sprays
Rusty Turing	Rainbow-Jet Dash	Neon-Flash	Right-hoof dominant	Fiber-Optic Mane	Magnets
Chrome Sparkle	Laser-Horn Beam	Spark-Missile	Left-hoof dominant	Fiber-Optic Mane	Rust-Dust
Laser Belle	Sonic Neigh	Gear-Bite	Left-hoof dominant	Fiber-Optic Mane	Rust-Dust
Ada Glitz	Plasma-Hoof Stomp	Gear-Bite	Right-hoof dominant	Copper Mane	Water-Sprays

Clue 1

Rounding

The main control panel has a damaged screen. It rounds the electricity surge to the nearest ten to protect the wires, giving us our first hint.

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

200

2300

900

300

1100

3700

9000

4300

130

900

2000

9000

130

200

3000

2000

900

3700

2900

1100

130

110

200

3700

1100

110

2300

370

Round 169 to the nearest hundredT

Round 1,642 to the nearest thousandS

Round 4,302 to the nearest hundredD

Round 367 to the nearest tenP

Round 2,623 to the nearest thousandU

Round 267 to the nearest hundredV

Round 3,733 to the nearest hundredA

Round 111 to the nearest tenW

Round 1,074 to the nearest hundredL

Round 133 to the nearest tenO

Round 8,997 to the nearest thousandN

Round 2,851 to the nearest hundredG

Round 2,261 to the nearest hundredH

Round 72 to the nearest tenI

Round 856 to the nearest hundredE

0/15 letters found

Clue 2

Addition

We count the extra batteries taken from the charging racks. Adding them together tells us how much power the rogue unit has now.

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

2468

7848

2087

7992

6565

7992

7127

6049

5775

7127

6229

2393

2065

7127

5871

2065

6565

2348

2468

6565

2393

2468

7614

6859

6565

7127

5871

1428 + 1040 =R

1545 + 848 =E

3932 + 2117 =F

1107 + 958 =S

4494 + 2633 =O

4103 + 2126 =D

1979 + 4586 =T

3512 + 4480 =H

1306 + 1042 =A

1190 + 897 =G

2701 + 4913 =B

4654 + 3194 =I

2959 + 3900 =U

2670 + 3201 =N

2278 + 3497 =C

0/15 letters found

Clue 3

Subtraction

The security gate lost power during the escape. Subtracting the remaining power from the total shows how much was drained.

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

4872

2640

3981

7956

5191

4218

5109

5191

2640

4916

4218

5191

3118

4218

3981

7956

3378

3981

3431

7956

4381

3245

3981

5191

3118

3378

7956

5191

9438 - 4566 =W

7954 - 2845 =P

4320 - 1680 =A

7068 - 2687 =I

7949 - 2758 =R

6279 - 2061 =S

9581 - 1625 =E

7366 - 3385 =T

4986 - 1741 =N

7942 - 4824 =U

6648 - 3217 =H

7807 - 2891 =Y

8213 - 4835 =D

0/13 letters found

Clue 4

Multiplication facts (1-12)

We inspect the storage room. The thief knocked over several boxes that were arranged in equal rows, helping us find the total mess.

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

11 × 1 =G

5 × 5 =R

9 × 12 =T

5 × 10 =H

8 × 4 =E

5 × 3 =I

3 × 11 =L

1 × 1 =W

4 × 4 =N

8 × 10 =S

5 × 6 =A

7 × 1 =D

1 × 8 =O

6 × 6 =F

0/14 letters found

Clue 5

Division facts (1-12) — the last clue

A pack of robo-puppy guards found a pile of dropped bolts. We must share the bolts equally among them to see how many each puppy gets.

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

72 ÷ 9 = ?

72 ÷ 6 = ?

30 ÷ 3 = ?

54 ÷ 9 = ?

55 ÷ 11 = ?

8 ÷ 2 = ?

99 ÷ 9 = ?

21 ÷ 3 = ?

99 ÷ 11 = ?

14 ÷ 7 = ?

36 ÷ 12 = ?

Step 2 — cross out the sentence with each answer

1.The villain fired a laser horn beam, then triggered a neon flash.

2.The villain used a rainbow jet dash, then snapped with a gear bite.

3.The villain delivered a plasma hoof stomp, then whipped a glow tail.

4.The villain blasted a sonic neigh, then launched a spark missile.

5.The villain blasted a sonic neigh, then deployed cyber wings.

6.The villain activated an electro shield, then triggered a neon flash.

7.The villain delivered a plasma hoof stomp, then triggered a neon flash.

8.The villain fired a laser horn beam, then deployed cyber wings.

9.The villain used a rainbow jet dash, then deployed cyber wings.

10.The villain blasted a sonic neigh, then snapped with a gear bite.

11.The villain fired a laser horn beam, then launched a spark missile.

12.The villain activated an electro shield, then snapped with a gear bite.

Solve it

Name the culprit

Choose the one suspect left standing.

Answer Key — The Cyber-Pasture Mystery

Culprit: Sparky Lovelace (Laser-Horn Beam · Neon-Flash · Right-hoof dominant · Fiber-Optic Mane · Water-Sprays)

Clue 1 (Rounding): "THE VILLAIN DOES NOT USE A GLOW TAIL WHIP"
Round 169 to the nearest hundred = 200 (T) · Round 1,642 to the nearest thousand = 2000 (S) · Round 4,302 to the nearest hundred = 4300 (D) · Round 367 to the nearest ten = 370 (P) · Round 2,623 to the nearest thousand = 3000 (U) · Round 267 to the nearest hundred = 300 (V) · Round 3,733 to the nearest hundred = 3700 (A) · Round 111 to the nearest ten = 110 (W) · Round 1,074 to the nearest hundred = 1100 (L) · Round 133 to the nearest ten = 130 (O) · Round 8,997 to the nearest thousand = 9000 (N) · Round 2,851 to the nearest hundred = 2900 (G) · Round 2,261 to the nearest hundred = 2300 (H) · Round 72 to the nearest ten = 70 (I) · Round 856 to the nearest hundred = 900 (E)
Clue 2 (Addition): "RIGHT HOOF CODES ON STARTER BUTTON"
1428 + 1040 = 2468 (R) · 1545 + 848 = 2393 (E) · 3932 + 2117 = 6049 (F) · 1107 + 958 = 2065 (S) · 4494 + 2633 = 7127 (O) · 4103 + 2126 = 6229 (D) · 1979 + 4586 = 6565 (T) · 3512 + 4480 = 7992 (H) · 1306 + 1042 = 2348 (A) · 1190 + 897 = 2087 (G) · 2701 + 4913 = 7614 (B) · 4654 + 3194 = 7848 (I) · 2959 + 3900 = 6859 (U) · 2670 + 3201 = 5871 (N) · 2278 + 3497 = 5775 (C)
Clue 3 (Subtraction): "WATER SPRAYS RUSTED THE INTRUDER"
9438 - 4566 = 4872 (W) · 7954 - 2845 = 5109 (P) · 4320 - 1680 = 2640 (A) · 7068 - 2687 = 4381 (I) · 7949 - 2758 = 5191 (R) · 6279 - 2061 = 4218 (S) · 9581 - 1625 = 7956 (E) · 7366 - 3385 = 3981 (T) · 4986 - 1741 = 3245 (N) · 7942 - 4824 = 3118 (U) · 6648 - 3217 = 3431 (H) · 7807 - 2891 = 4916 (Y) · 8213 - 4835 = 3378 (D)
Clue 4 (Multiplication facts (1-12)): "GLOWING GLASS THREADS ON FLOOR"
11 × 1 = 11 (G) · 5 × 5 = 25 (R) · 9 × 12 = 108 (T) · 5 × 10 = 50 (H) · 8 × 4 = 32 (E) · 5 × 3 = 15 (I) · 3 × 11 = 33 (L) · 1 × 1 = 1 (W) · 4 × 4 = 16 (N) · 8 × 10 = 80 (S) · 5 × 6 = 30 (A) · 7 × 1 = 7 (D) · 1 × 8 = 8 (O) · 6 × 6 = 36 (F)
Clue 5 (Division facts (1-12)): surviving statement (box 1) → Sparky Lovelace
72 ÷ 9 = 8 · 72 ÷ 6 = 12 · 30 ÷ 3 = 10 · 54 ÷ 9 = 6 · 55 ÷ 11 = 5 · 8 ÷ 2 = 4 · 99 ÷ 9 = 11 · 21 ÷ 3 = 7 · 99 ÷ 11 = 9 · 14 ÷ 7 = 2 · 36 ÷ 12 = 3

About this mystery

Grade level: Grade 4 math
Math topics: Rounding, Addition, Subtraction, Multiplication, Division
Reading level: grades 3-4
Theme: The Cyber-Pasture Mystery — set in the high-tech Sparkle-Core Laboratory
Format: Interactive online & printable worksheet with answer key
Solution: One unique, verified culprit among 21 suspects

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