🦄 UnicornsGrade 5Reading: grades 3-4Place valueFractions of a numberRoundingSkip counting
The Case of the Stolen Rainbow Gem
Someone scrambled the star maps in Cloudberry Forest and stole the Rainbow Gem! Detective, check the clues to find out which magical unicorn did it.
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 Horn Ability | Sparkle Aura | Dominant Hoof | Mane Style | Tricked By |
|---|---|---|---|---|---|
| Radiance | Flower Blooming | Glitter Dust | Right Hooved | Curly Mane | Sweet Apples |
| Whisper | Flower Blooming | Glitter Dust | Left Hooved | Curly Mane | Soft Music |
| Sunburst | Flower Blooming | Moon Frost | Left Hooved | Spiky Mane | Soft Music |
| Prism | Cloud Hopping | Moon Frost | Left Hooved | Spiky Mane | Soft Music |
| Starbeam | Starlight Glow | Glitter Dust | Right Hooved | Spiky Mane | Sweet Apples |
| Twilight | Cloud Hopping | Moon Frost | Right Hooved | Braided Mane | Silly Jokes |
| Glimmer | Flower Blooming | Golden Sparks | Right Hooved | Spiky Mane | Sweet Apples |
| Velvet | Crystal Healing | Sun Flare | Left Hooved | Spiky Mane | Soft Music |
| Nimbus | Cloud Hopping | Sun Flare | Right Hooved | Curly Mane | Soft Music |
| Opal | Rainbow Beam | Golden Sparks | Right Hooved | Spiky Mane | Soft Music |
| Zaffre | Flower Blooming | Silver Shimmer | Left Hooved | Braided Mane | Soft Music |
| Sunkiss | Flower Blooming | Sun Flare | Right Hooved | Spiky Mane | Soft Music |
| Celestia | Starlight Glow | Silver Shimmer | Right Hooved | Braided Mane | Sweet Apples |
| Buttercup | Crystal Healing | Glitter Dust | Right Hooved | Spiky Mane | Soft Music |
| Starlight | Rainbow Beam | Golden Sparks | Left Hooved | Spiky Mane | Soft Music |
| Astral | Starlight Glow | Sun Flare | Left Hooved | Spiky Mane | Silly Jokes |
| Moonlight | Starlight Glow | Glitter Dust | Left Hooved | Spiky Mane | Soft Music |
| Aurora | Crystal Healing | Glitter Dust | Left Hooved | Spiky Mane | Sweet Apples |
| Crystal | Rainbow Beam | Glitter Dust | Left Hooved | Braided Mane | Silly Jokes |
| Jewel | Starlight Glow | Silver Shimmer | Right Hooved | Curly Mane | Soft Music |
| Dazzle | Crystal Healing | Golden Sparks | Left Hooved | Braided Mane | Soft Music |
Clue 1
Place value
The guard examines a place value chart on the enchanted vault lock to find the first digit.
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
8000
6000
1000
60
3000
200
200
900
3000
600
9000
100
1000
30
600
100
T
8000
80
30
1000
700
100
200
9000
1000
600
30
500
900
800
300
30
What is the value of the 8 in 448,001?T
What is the value of the 9 in 69,515?D
What is the value of the 6 in 772,761?V
What is the value of the 7 in 512,738?G
What is the value of the 6 in 253,610?N
What is the value of the 3 in 46,635?S
What is the value of the 6 in 296,002?H
What is the value of the 2 in 16,295?L
What is the value of the 8 in 13,986?U
What is the value of the 8 in 746,871?R
What is the value of the 3 in 13,755?I
What is the value of the 3 in 85,314?K
What is the value of the 1 in 81,505?E
What is the value of the 1 in 926,199?O
What is the value of the 9 in 52,955?A
What is the value of the 5 in 601,508?P
0/16 letters found
Clue 2
Fractions of a number
To open the secret path, the detective calculates a fraction of the glowing magic crystals.
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
37
29
35
17
40
35
8
20
13
17
2
17
16
35
24
T
37
17
T
37
8
6
16
35
33
8
7
35
15
T
37
29
36
36
15
16
21
5
40
T
37
4/8 of 74 =T
2/8 of 140 =E
2/10 of 145 =H
5/10 of 42 =R
5/10 of 14 =L
4/6 of 30 =K
2/8 of 20 =I
3/8 of 16 =M
4/6 of 24 =P
1/5 of 10 =U
1/6 of 78 =Y
1/5 of 165 =D
2/10 of 40 =A
4/8 of 72 =O
4/6 of 60 =N
1/6 of 90 =F
1/4 of 96 =C
1/4 of 68 =S
0/18 letters found
Clue 3
Rounding
The forest radar display rounds all power readings to the nearest hundred.
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
290
700
90
3000
1300
1100
1100
7000
1300
3700
2000
7000
430
430
T
290
1700
70
70
90
230
2300
4300
430
1700
900
T
290
5000
130
430
1300
300
Round 290 to the nearest tenT
Round 2,323 to the nearest hundredB
Round 927 to the nearest hundredF
Round 1,309 to the nearest hundredI
Round 88 to the nearest tenE
Round 1,063 to the nearest hundredL
Round 4,943 to the nearest thousandM
Round 4,255 to the nearest hundredY
Round 1,689 to the nearest hundredO
Round 432 to the nearest tenS
Round 668 to the nearest hundredH
Round 69 to the nearest tenP
Round 3,261 to the nearest thousandV
Round 3,705 to the nearest hundredN
Round 227 to the nearest tenD
Round 1,617 to the nearest thousandW
Round 7,062 to the nearest thousandA
Round 340 to the nearest hundredC
Round 130 to the nearest tenU
0/19 letters found
Clue 4
Skip counting
The ranger skip counts the sparkly horseshoe prints along the muddy trail.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
S
10
9
110
60
140
90
S
10
27
110
22
45
60
S
10
8
18
70
12
45
60
140
42
40
42
110
42
27
22
25
140
90
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14S
Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15T
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, ___, 75, 80K
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33F
Skip-count by 10s. Fill the blank: 10, 20, 30, ___, 50, 60W
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, ___, 21, 24I
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, ___, 14, 16Y
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110D
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, ___, 24, 26O
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, ___, 150, 160N
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55M
Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12P
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, ___, 30, 35U
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130R
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, ___, 45, 48E
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, ___, 65, 70A
0/16 letters found
Clue 5
Fractions of a number — the last clue
The caretaker measures out a fraction of the starry sugar cubes to test the potion.
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
2/5 of 30 = ?
1/4 of 12 = ?
3/5 of 15 = ?
1/2 of 20 = ?
3/6 of 22 = ?
2/5 of 10 = ?
5/6 of 6 = ?
2/4 of 16 = ?
1/6 of 6 = ?
3/6 of 4 = ?
3/8 of 16 = ?
Step 2 — cross out the sentence with each answer
1.The villain shot a bright rainbow beam, then left behind glitter dust.
2.The villain shot a bright rainbow beam, then trailed cold moon frost.
3.The villain made colorful flowers bloom, then trailed cold moon frost.
4.The villain hopped across soft cloud tops, then burst with a warm sun flare.
5.The villain made colorful flowers bloom, then dropped glowing golden sparks.
6.The villain shot a bright rainbow beam, then flashed a silver shimmer.
7.The villain used crystal healing magic, then burst with a warm sun flare.
8.The villain shot a bright rainbow beam, then burst with a warm sun flare.
9.The villain lit up with starlight glow, then left behind glitter dust.
10.The villain used crystal healing magic, then left behind glitter dust.
11.The villain used crystal healing magic, then dropped glowing golden sparks.
12.The villain hopped across soft cloud tops, then trailed cold moon frost.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Case of the Stolen Rainbow Gem
Culprit: Velvet (Crystal Healing · Sun Flare · Left Hooved · Spiky Mane · Soft Music)
- Clue 1 (Place value): "THE VILLAIN DOES NOT USE GOLDEN SPARKS"What is the value of the 8 in 448,001? = 8000 (T) · What is the value of the 9 in 69,515? = 9000 (D) · What is the value of the 6 in 772,761? = 60 (V) · What is the value of the 7 in 512,738? = 700 (G) · What is the value of the 6 in 253,610? = 600 (N) · What is the value of the 3 in 46,635? = 30 (S) · What is the value of the 6 in 296,002? = 6000 (H) · What is the value of the 2 in 16,295? = 200 (L) · What is the value of the 8 in 13,986? = 80 (U) · What is the value of the 8 in 746,871? = 800 (R) · What is the value of the 3 in 13,755? = 3000 (I) · What is the value of the 3 in 85,314? = 300 (K) · What is the value of the 1 in 81,505? = 1000 (E) · What is the value of the 1 in 926,199? = 100 (O) · What is the value of the 9 in 52,955? = 900 (A) · What is the value of the 5 in 601,508? = 500 (P)
- Clue 2 (Fractions of a number): "THE SNEAKY SUSPECT STAMPED A LEFT HOOFPRINT"4/8 of 74 = 37 (T) · 2/8 of 140 = 35 (E) · 2/10 of 145 = 29 (H) · 5/10 of 42 = 21 (R) · 5/10 of 14 = 7 (L) · 4/6 of 30 = 20 (K) · 2/8 of 20 = 5 (I) · 3/8 of 16 = 6 (M) · 4/6 of 24 = 16 (P) · 1/5 of 10 = 2 (U) · 1/6 of 78 = 13 (Y) · 1/5 of 165 = 33 (D) · 2/10 of 40 = 8 (A) · 4/8 of 72 = 36 (O) · 4/6 of 60 = 40 (N) · 1/6 of 90 = 15 (F) · 1/4 of 96 = 24 (C) · 1/4 of 68 = 17 (S)
- Clue 3 (Rounding): "THE VILLAIN WAS STOPPED BY SOFT MUSIC"Round 290 to the nearest ten = 290 (T) · Round 2,323 to the nearest hundred = 2300 (B) · Round 927 to the nearest hundred = 900 (F) · Round 1,309 to the nearest hundred = 1300 (I) · Round 88 to the nearest ten = 90 (E) · Round 1,063 to the nearest hundred = 1100 (L) · Round 4,943 to the nearest thousand = 5000 (M) · Round 4,255 to the nearest hundred = 4300 (Y) · Round 1,689 to the nearest hundred = 1700 (O) · Round 432 to the nearest ten = 430 (S) · Round 668 to the nearest hundred = 700 (H) · Round 69 to the nearest ten = 70 (P) · Round 3,261 to the nearest thousand = 3000 (V) · Round 3,705 to the nearest hundred = 3700 (N) · Round 227 to the nearest ten = 230 (D) · Round 1,617 to the nearest thousand = 2000 (W) · Round 7,062 to the nearest thousand = 7000 (A) · Round 340 to the nearest hundred = 300 (C) · Round 130 to the nearest ten = 130 (U)
- Clue 4 (Skip counting): "STRANDS FROM A SPIKY MANE WERE FOUND"Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14 = 10 (S) · Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15 = 9 (T) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, ___, 75, 80 = 70 (K) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33 = 27 (F) · Skip-count by 10s. Fill the blank: 10, 20, 30, ___, 50, 60 = 40 (W) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, ___, 21, 24 = 18 (I) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, ___, 14, 16 = 12 (Y) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110 = 90 (D) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, ___, 24, 26 = 22 (O) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, ___, 150, 160 = 140 (N) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55 = 45 (M) · Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12 = 8 (P) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, ___, 30, 35 = 25 (U) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130 = 110 (R) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, ___, 45, 48 = 42 (E) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, ___, 65, 70 = 60 (A)
- Clue 5 (Fractions of a number): surviving statement (box 7) → Velvet2/5 of 30 = 12 · 1/4 of 12 = 3 · 3/5 of 15 = 9 · 1/2 of 20 = 10 · 3/6 of 22 = 11 · 2/5 of 10 = 4 · 5/6 of 6 = 5 · 2/4 of 16 = 8 · 1/6 of 6 = 1 · 3/6 of 4 = 2 · 3/8 of 16 = 6
About this mystery
- Grade level
- Grade 5 math
- Math topics
- Place value, Fractions of a number, Rounding, Skip counting
- Reading level
- grades 3-4
- Theme
- The Case of the Stolen Rainbow Gem — set in Cloudberry Forest
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects