🦄 UnicornsGrade 5Reading: grades 5-6Skip countingRoundingMultiplicationFractions of a numberMissing addends
The Case of the Missing Starlight Horn
Someone snuck into the Crystal Meadow Sanctuary and swapped the Glowing Starlight Horn with a fake glass sculpture. Solve the clues to reveal 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 | Magic Sparkle | Horn Power | Hoof Mark | Mane Color | Favorite Treat |
|---|---|---|---|---|---|
| Lucian Luster | Starlight Shield | Levitation | Right Hoofprint | Silver Mane | Moon Berries |
| Rosalind Ray | Melody Humming | Teleportation | Right Hoofprint | Golden Mane | Sparkle Apples |
| Silas Spark | Rainbow Beam | Teleportation | Left Hoofprint | Silver Mane | Moon Berries |
| Beatrix Breeze | Cloud Floating | Levitation | Right Hoofprint | Golden Mane | Moon Berries |
| Tristan Twinkle | Melody Humming | Ice Freezing | Right Hoofprint | Silver Mane | Moon Berries |
| Rory Radiant | Starlight Shield | Ice Freezing | Right Hoofprint | Silver Mane | Sweet Clover |
| Aurelia Hoof | Rainbow Beam | Ice Freezing | Left Hoofprint | Violet Mane | Sweet Clover |
| Gweneth Glimmer | Rainbow Beam | Levitation | Right Hoofprint | Silver Mane | Sparkle Apples |
| Celestia Nova | Melody Humming | Teleportation | Right Hoofprint | Golden Mane | Sweet Clover |
| Felix Frost | Rainbow Beam | Super Speed | Right Hoofprint | Silver Mane | Sweet Clover |
| Cordelia Comet | Cloud Floating | Teleportation | Left Hoofprint | Golden Mane | Sparkle Apples |
| Julian Prism | Melody Humming | Ice Freezing | Right Hoofprint | Violet Mane | Sweet Clover |
| Darius Dawn | Cloud Floating | Levitation | Right Hoofprint | Golden Mane | Sparkle Apples |
| Thaddeus Trot | Gem Creation | Levitation | Left Hoofprint | Silver Mane | Moon Berries |
| Jasper Prance | Cloud Floating | Ice Freezing | Right Hoofprint | Silver Mane | Moon Berries |
| Barnaby Braid | Gem Creation | Time Rewind | Right Hoofprint | Silver Mane | Moon Berries |
| Penelope Pastel | Starlight Shield | Time Rewind | Left Hoofprint | Silver Mane | Sparkle Apples |
| Seraphina Star | Starlight Shield | Super Speed | Right Hoofprint | Silver Mane | Moon Berries |
| Valerie Velvet | Gem Creation | Teleportation | Left Hoofprint | Silver Mane | Sweet Clover |
| Gideon Glitter | Gem Creation | Levitation | Right Hoofprint | Violet Mane | Moon Berries |
| Cassandra Crest | Cloud Floating | Teleportation | Left Hoofprint | Violet Mane | Moon Berries |
Clue 1
Skip counting
The sanctuary trail is marked by stepping stones spaced in equal patterns. Count along the path to unlock 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.
T
130
15
8
27
12
27
18
8
90
T
130
45
55
8
27
33
55
T
130
15
20
120
8
T
130
9
16
8
140
8
100
9
33
45
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, ___, 140, 150T
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, ___, 20, 22P
Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12E
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20M
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65O
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55D
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, ___, 14, 16U
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110C
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, ___, 110, 120W
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33S
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, ___, 22, 24A
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, ___, 130, 140V
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, ___, 150, 160R
Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15I
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, ___, 18, 21H
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39N
0/16 letters found
Clue 2
Rounding
The crystal scanner shows energy levels rounded to the nearest hundred. Round each reading to reveal the next message.
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
3000
230
90
T
3000
230
3700
90
200
20
90
200
T
3000
1300
4300
20
90
1300
110
110
3700
700
230
T
3000
230
500
500
200
370
110
3700
2900
T
3000
Round 2,902 to the nearest thousandT
Round 4,285 to the nearest hundredC
Round 1,326 to the nearest hundredA
Round 21 to the nearest tenL
Round 188 to the nearest hundredF
Round 3,719 to the nearest hundredI
Round 670 to the nearest hundredG
Round 527 to the nearest hundredO
Round 89 to the nearest tenE
Round 232 to the nearest tenH
Round 108 to the nearest tenR
Round 374 to the nearest tenP
Round 2,891 to the nearest hundredN
0/13 letters found
Clue 3
Multiplication facts (1-12)
Enchanted stable boxes are arranged in equal rows and columns. Multiply the grid counts to decipher the 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.
T
90
54
5
T
90
54
42
5
70
14
32
20
20
T
90
1
66
66
5
10
9
77
36
1
1
40
9
5
120
120
42
5
20
9 × 10 =T
4 × 10 =N
1 × 1 =O
2 × 10 =S
10 × 7 =F
9 × 6 =H
2 × 7 =W
5 × 2 =D
11 × 6 =P
12 × 10 =R
1 × 5 =E
7 × 6 =I
4 × 8 =A
3 × 3 =B
3 × 12 =M
11 × 7 =Y
0/16 letters found
Clue 4
Fractions of a number
The herd divided their daily glitter oats into exact fractional portions. Calculate each fraction to gather more 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.
T
26
23
30
30
25
9
7
30
24
10
30
9
24
10
6
15
7
30
37
37
9
6
25
30
13
17
35
24
30
23
35
9
13
2/6 of 78 =T
5/10 of 18 =I
2/6 of 39 =R
1/8 of 200 =V
4/8 of 74 =S
5/10 of 20 =C
1/3 of 105 =A
2/6 of 45 =U
1/8 of 56 =D
1/6 of 138 =H
3/10 of 20 =L
6/10 of 50 =E
1/5 of 85 =M
1/5 of 120 =N
0/14 letters found
Clue 5
Missing addends — the last clue
The potion scale needs a balanced sum to unlock the final vault door. Find the missing amounts to solve the mystery.
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
32 + ___ = 42
39 + ___ = 45
8 + ___ = 15
29 + ___ = 34
30 + ___ = 41
23 + ___ = 35
40 + ___ = 48
28 + ___ = 30
26 + ___ = 35
22 + ___ = 23
40 + ___ = 43
Step 2 — cross out the sentence with each answer
1.The villain hums a soothing tune, then teleports through fog.
2.The villain creates glowing shields, then freezes grass with ice.
3.The villain floats on soft clouds, then dashes at super speed.
4.The villain creates glowing shields, then levitates heavy rocks.
5.The villain hums a soothing tune, then dashes at super speed.
6.The villain floats on soft clouds, then freezes grass with ice.
7.The villain creates glowing shields, then dashes at super speed.
8.The villain grows radiant gems, then teleports through fog.
9.The villain hums a soothing tune, then rewinds time briefly.
10.The villain hums a soothing tune, then freezes grass with ice.
11.The villain shatters crystal stones, then dashes at super speed.
12.The villain creates glowing shields, then rewinds time briefly.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Case of the Missing Starlight Horn
Culprit: Lucian Luster (Starlight Shield · Levitation · Right Hoofprint · Silver Mane · Moon Berries)
- Clue 1 (Skip counting): "THE SUSPECT DOES NOT HAVE TIME REWIND"Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, ___, 140, 150 = 130 (T) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, ___, 20, 22 = 18 (P) · Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12 = 8 (E) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20 = 16 (M) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65 = 55 (O) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55 = 45 (D) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, ___, 14, 16 = 12 (U) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110 = 90 (C) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, ___, 110, 120 = 100 (W) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33 = 27 (S) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, ___, 22, 24 = 20 (A) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, ___, 130, 140 = 120 (V) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, ___, 150, 160 = 140 (R) · Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15 = 9 (I) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, ___, 18, 21 = 15 (H) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39 = 33 (N)
- Clue 2 (Rounding): "THE THIEF LEFT A CLEAR RIGHT HOOFPRINT"Round 2,902 to the nearest thousand = 3000 (T) · Round 4,285 to the nearest hundred = 4300 (C) · Round 1,326 to the nearest hundred = 1300 (A) · Round 21 to the nearest ten = 20 (L) · Round 188 to the nearest hundred = 200 (F) · Round 3,719 to the nearest hundred = 3700 (I) · Round 670 to the nearest hundred = 700 (G) · Round 527 to the nearest hundred = 500 (O) · Round 89 to the nearest ten = 90 (E) · Round 232 to the nearest ten = 230 (H) · Round 108 to the nearest ten = 110 (R) · Round 374 to the nearest ten = 370 (P) · Round 2,891 to the nearest hundred = 2900 (N)
- Clue 3 (Multiplication facts (1-12)): "THE THIEF WAS STOPPED BY MOON BERRIES"9 × 10 = 90 (T) · 4 × 10 = 40 (N) · 1 × 1 = 1 (O) · 2 × 10 = 20 (S) · 10 × 7 = 70 (F) · 9 × 6 = 54 (H) · 2 × 7 = 14 (W) · 5 × 2 = 10 (D) · 11 × 6 = 66 (P) · 12 × 10 = 120 (R) · 1 × 5 = 5 (E) · 7 × 6 = 42 (I) · 4 × 8 = 32 (A) · 3 × 3 = 9 (B) · 3 × 12 = 36 (M) · 11 × 7 = 77 (Y)
- Clue 4 (Fractions of a number): "THE EVIDENCE INCLUDES SILVER MANE HAIR"2/6 of 78 = 26 (T) · 5/10 of 18 = 9 (I) · 2/6 of 39 = 13 (R) · 1/8 of 200 = 25 (V) · 4/8 of 74 = 37 (S) · 5/10 of 20 = 10 (C) · 1/3 of 105 = 35 (A) · 2/6 of 45 = 15 (U) · 1/8 of 56 = 7 (D) · 1/6 of 138 = 23 (H) · 3/10 of 20 = 6 (L) · 6/10 of 50 = 30 (E) · 1/5 of 85 = 17 (M) · 1/5 of 120 = 24 (N)
- Clue 5 (Missing addends): surviving statement (box 4) → Lucian Luster32 + ___ = 42 = 10 · 39 + ___ = 45 = 6 · 8 + ___ = 15 = 7 · 29 + ___ = 34 = 5 · 30 + ___ = 41 = 11 · 23 + ___ = 35 = 12 · 40 + ___ = 48 = 8 · 28 + ___ = 30 = 2 · 26 + ___ = 35 = 9 · 22 + ___ = 23 = 1 · 40 + ___ = 43 = 3
About this mystery
- Grade level
- Grade 5 math
- Math topics
- Skip counting, Rounding, Multiplication, Fractions of a number, Missing addends
- Reading level
- grades 5-6
- Theme
- The Case of the Missing Starlight Horn — set in Crystal Meadow Sanctuary
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects