🦄 UnicornsGrade 4Reading: grades 3-4Skip countingRoundingAdditionSubtractionDivision

The Mystery of the Stolen Star Crystal

Someone snuck into the Great Tree of Sparkle Valley and took the sacred Star Crystal! The Meadow Keeper needs your help to catch the sneaky thief before the valley loses its magic glow forever.

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	magic power	special aura	horseshoe style	mane color	distraction
Pebble Prance	cloud leap	moon glow	silver horseshoes	silver mane	soft lullaby
Celeste Star	cloud leap	moon glow	silver horseshoes	silver mane	shiny mirrors
Sunny Sparkle	cloud leap	glitter trail	silver horseshoes	silver mane	sweet apples
Tinsel Trot	rainbow beam	glitter trail	silver horseshoes	pink mane	sweet apples
Twinkle Tail	cloud leap	glitter trail	golden horseshoes	silver mane	soft lullaby
Flicker Fancy	rainbow beam	warm breeze	silver horseshoes	pink mane	sweet apples
Coral Cloud	crystal shield	sweet scent	silver horseshoes	silver mane	shiny mirrors
Pippin Pop	star flight	warm breeze	silver horseshoes	pink mane	shiny mirrors
Velvet Mist	blossom bloom	moon glow	golden horseshoes	pink mane	shiny mirrors
Misty Meadow	blossom bloom	glitter trail	silver horseshoes	silver mane	sweet apples
Ziggy Comet	rainbow beam	sweet scent	golden horseshoes	silver mane	sweet apples
Flutter Fern	crystal shield	glitter trail	golden horseshoes	pink mane	sweet apples
Whisper Willow	blossom bloom	sweet scent	silver horseshoes	silver mane	sweet apples
Dazzle Dash	rainbow beam	glitter trail	golden horseshoes	purple mane	soft lullaby
Nova Night	rainbow beam	bell chime	silver horseshoes	purple mane	shiny mirrors
Cosmo Crest	star flight	warm breeze	silver horseshoes	silver mane	sweet apples
Zipping Zephyr	crystal shield	sweet scent	silver horseshoes	pink mane	sweet apples
Ruby Ray	crystal shield	bell chime	silver horseshoes	silver mane	sweet apples
Barnaby Bright	crystal shield	glitter trail	golden horseshoes	pink mane	soft lullaby
Breezy Bell	star flight	moon glow	silver horseshoes	pink mane	sweet apples
Jasper Glow	blossom bloom	glitter trail	golden horseshoes	purple mane	sweet apples

Clue 1

Skip counting

We counted stepping stones across the Sparkle River in equal skips to find the first clue.

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

130

Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, ___, 16, 18T

Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, ___, 45, 48N

Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, ___, 140, 150O

Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, ___, 14, 16L

Skip-count by 2s. Fill the blank: 2, 4, ___, 8, 10C

Skip-count by 10s. Fill the blank: 10, 20, ___, 40, 50V

Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55S

Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65M

Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, ___, 20, 22E

Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110A

Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, ___, 45, 50B

Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, ___, 39, 42H

Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12D

Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, ___, 55, 60I

0/14 letters found

Clue 2

Rounding

The magic glitter detector gave us a rough rounded estimate of the energy left behind.

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

130

9000

290

1700

3000

7000

230

1300

2000

200

9000

1300

300

130

7000

230

500

7000

1300

1100

170

9000

230

9000

7000

170

7000

230

170

7000

Round 134 to the nearest tenT

Round 1,852 to the nearest thousandM

Round 3,253 to the nearest thousandK

Round 292 to the nearest tenA

Round 1,101 to the nearest hundredV

Round 17 to the nearest tenH

Round 508 to the nearest hundredF

Round 1,299 to the nearest hundredI

Round 6,677 to the nearest thousandS

Round 298 to the nearest hundredN

Round 1,732 to the nearest hundredC

Round 233 to the nearest hundredP

Round 48 to the nearest tenL

Round 8,559 to the nearest thousandR

Round 90 to the nearest tenW

Round 168 to the nearest tenE

Round 231 to the nearest tenO

0/17 letters found

Clue 3

Addition

By adding up all the fallen star flakes in the orchard, we unlocked another piece of evidence.

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

7093

3220

5458

8544

7846

2260

3666

7846

4267

9467

3666

3398

7093

5213

2033

5458

8999

4561

7372

3398

9467

5458

7093

3666

2033

2260

5458

3398

3623 + 3470 =T

2999 + 6468 =W

2093 + 1573 =A

2698 + 2515 =O

1117 + 916 =P

2687 + 2771 =E

2653 + 1908 =B

3958 + 3414 =Y

734 + 1526 =L

1744 + 2523 =N

4733 + 3811 =V

3953 + 3893 =I

1913 + 1307 =H

4959 + 4040 =D

1335 + 2063 =S

0/15 letters found

Clue 4

Subtraction

We subtracted the missing magic ribbons from the total pile to see what remained.

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

6238

8164

4126

3587

1521

6572

6238

1742

4382

3587

6238

2791

3826

4495

7101

4126

5092

3587

1521

7101

1029

7101

4126

7101

4382

1742

6742

1521

6572

1521

7101

3587

4126

1989

3126

10247 - 4009 =S

11209 - 4467 =U

8204 - 4378 =L

5665 - 2078 =A

6488 - 1396 =M

8840 - 4714 =R

7189 - 617 =D

10229 - 3128 =E

8781 - 4399 =F

3638 - 2609 =W

4143 - 2401 =O

5152 - 3163 =B

7024 - 2529 =V

4985 - 2194 =I

5079 - 1953 =Y

10712 - 2548 =T

5808 - 4287 =N

0/17 letters found

Clue 5

Division facts (1-12) — the last clue

We divided the total magic horseshoes into equal groups for each search team.

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

12 ÷ 1 = ?

40 ÷ 4 = ?

8 ÷ 8 = ?

49 ÷ 7 = ?

121 ÷ 11 = ?

32 ÷ 8 = ?

18 ÷ 9 = ?

3 ÷ 1 = ?

12 ÷ 2 = ?

90 ÷ 10 = ?

64 ÷ 8 = ?

Step 2 — cross out the sentence with each answer

1.The villain made a blossom bloom, then cast a sweet scent.

2.The villain raised a crystal shield, then created a moon glow.

3.The villain shot a rainbow beam, then created a moon glow.

4.The villain took off in star flight, then left a glitter trail.

5.The villain performed a cloud leap, then left a glitter trail.

6.The villain shot a rainbow beam, then made a bell chime.

7.The villain took off in star flight, then made a bell chime.

8.The villain took off in star flight, then cast a sweet scent.

9.The villain performed a cloud leap, then cast a sweet scent.

10.The villain made a blossom bloom, then left a glitter trail.

11.The villain raised a crystal shield, then made a bell chime.

12.The villain took off in star flight, then blew a warm breeze.

Solve it

Name the culprit

Choose the one suspect left standing.

Answer Key — The Mystery of the Stolen Star Crystal

Culprit: Sunny Sparkle (cloud leap · glitter trail · silver horseshoes · silver mane · sweet apples)

Clue 1 (Skip counting): "THE VILLAIN DOES NOT LEAVE A BELL CHIME"
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, ___, 16, 18 = 14 (T) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, ___, 45, 48 = 42 (N) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, ___, 140, 150 = 130 (O) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, ___, 14, 16 = 12 (L) · Skip-count by 2s. Fill the blank: 2, 4, ___, 8, 10 = 6 (C) · Skip-count by 10s. Fill the blank: 10, 20, ___, 40, 50 = 30 (V) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55 = 45 (S) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65 = 55 (M) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, ___, 20, 22 = 18 (E) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110 = 90 (A) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, ___, 45, 50 = 40 (B) · 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 2s. Fill the blank: 2, 4, 6, ___, 10, 12 = 8 (D) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, ___, 55, 60 = 50 (I)
Clue 2 (Rounding): "TRACKS SHOW IMPRINTS OF SILVER HORSESHOES"
Round 134 to the nearest ten = 130 (T) · Round 1,852 to the nearest thousand = 2000 (M) · Round 3,253 to the nearest thousand = 3000 (K) · Round 292 to the nearest ten = 290 (A) · Round 1,101 to the nearest hundred = 1100 (V) · Round 17 to the nearest ten = 20 (H) · Round 508 to the nearest hundred = 500 (F) · Round 1,299 to the nearest hundred = 1300 (I) · Round 6,677 to the nearest thousand = 7000 (S) · Round 298 to the nearest hundred = 300 (N) · Round 1,732 to the nearest hundred = 1700 (C) · Round 233 to the nearest hundred = 200 (P) · Round 48 to the nearest ten = 50 (L) · Round 8,559 to the nearest thousand = 9000 (R) · Round 90 to the nearest ten = 90 (W) · Round 168 to the nearest ten = 170 (E) · Round 231 to the nearest ten = 230 (O)
Clue 3 (Addition): "THE VILLAIN WAS STOPPED BY SWEET APPLES"
3623 + 3470 = 7093 (T) · 2999 + 6468 = 9467 (W) · 2093 + 1573 = 3666 (A) · 2698 + 2515 = 5213 (O) · 1117 + 916 = 2033 (P) · 2687 + 2771 = 5458 (E) · 2653 + 1908 = 4561 (B) · 3958 + 3414 = 7372 (Y) · 734 + 1526 = 2260 (L) · 1744 + 2523 = 4267 (N) · 4733 + 3811 = 8544 (V) · 3953 + 3893 = 7846 (I) · 1913 + 1307 = 3220 (H) · 4959 + 4040 = 8999 (D) · 1335 + 2063 = 3398 (S)
Clue 4 (Subtraction): "STRANDS OF A SILVER MANE WERE FOUND NEARBY"
10247 - 4009 = 6238 (S) · 11209 - 4467 = 6742 (U) · 8204 - 4378 = 3826 (L) · 5665 - 2078 = 3587 (A) · 6488 - 1396 = 5092 (M) · 8840 - 4714 = 4126 (R) · 7189 - 617 = 6572 (D) · 10229 - 3128 = 7101 (E) · 8781 - 4399 = 4382 (F) · 3638 - 2609 = 1029 (W) · 4143 - 2401 = 1742 (O) · 5152 - 3163 = 1989 (B) · 7024 - 2529 = 4495 (V) · 4985 - 2194 = 2791 (I) · 5079 - 1953 = 3126 (Y) · 10712 - 2548 = 8164 (T) · 5808 - 4287 = 1521 (N)
Clue 5 (Division facts (1-12)): surviving statement (box 5) → Sunny Sparkle
12 ÷ 1 = 12 · 40 ÷ 4 = 10 · 8 ÷ 8 = 1 · 49 ÷ 7 = 7 · 121 ÷ 11 = 11 · 32 ÷ 8 = 4 · 18 ÷ 9 = 2 · 3 ÷ 1 = 3 · 12 ÷ 2 = 6 · 90 ÷ 10 = 9 · 64 ÷ 8 = 8

About this mystery

Grade level: Grade 4 math
Math topics: Skip counting, Rounding, Addition, Subtraction, Division
Reading level: grades 3-4
Theme: The Mystery of the Stolen Star Crystal — set in Sparkle Valley
Format: Interactive online & printable worksheet with answer key
Solution: One unique, verified culprit among 21 suspects

More free printable math cases

4th grade worksheets Addition worksheets Subtraction worksheets Division worksheets Rounding worksheets Skip counting worksheets All worksheets →

The Mystery of the Whispering Jungle Map

Grade 4

Mystery of the Crystal Map

Grade 4

Mystery of Sunken Castle Island

Grade 4

The Case of the Missing Moon Trophy

Grade 4