🌊 Unicorns, Cats, MermaidsGrade 1Reading: grades 1-2AdditionSkip countingWord problemsSubtractionMissing addends
The Case of the Sparkle Crown
The magic Sparkle Crown is gone! It was safe in the shell pool. Now only some shiny footprints are left. Can you help us find the sneaky purr-maid who took 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 Move | Tricky Trick | Bow Color | Mane Style | Treat Weakness |
|---|---|---|---|---|---|
| Cleo | star blast | sea song | wears blue bow | pink mane | warm milk |
| Coco | star blast | mist jump | wears pink bow | pink mane | warm milk |
| Coral | horn glow | shell toss | wears pink bow | blue mane | warm milk |
| Daisy | purr wave | kelp spin | wears blue bow | blue mane | catnip treats |
| Star | star blast | sand dig | wears blue bow | blue mane | shiny mirrors |
| Pearl | bubble dash | kelp spin | wears blue bow | pink mane | catnip treats |
| Marina | bubble dash | kelp spin | wears blue bow | purple mane | shiny mirrors |
| Shelly | horn glow | sea song | wears pink bow | purple mane | shiny mirrors |
| Bella | purr wave | sea song | wears blue bow | pink mane | catnip treats |
| Angel | purr wave | sand dig | wears blue bow | blue mane | warm milk |
| Chloe | horn glow | kelp spin | wears blue bow | pink mane | shiny mirrors |
| Twinkle | bubble dash | shell toss | wears blue bow | purple mane | shiny mirrors |
| Sparkle | bubble dash | mist jump | wears blue bow | purple mane | warm milk |
| Princess | star blast | sand dig | wears blue bow | pink mane | warm milk |
| Aqua | horn glow | shell toss | wears blue bow | purple mane | shiny mirrors |
| Fluffy | tail splash | kelp spin | wears blue bow | purple mane | shiny mirrors |
| Sandy | star blast | mist jump | wears blue bow | purple mane | shiny mirrors |
| Sunny | purr wave | mist jump | wears blue bow | purple mane | catnip treats |
| Lily | tail splash | sea song | wears blue bow | purple mane | shiny mirrors |
| Pippa | purr wave | sand dig | wears blue bow | purple mane | catnip treats |
| Luna | bubble dash | shell toss | wears pink bow | purple mane | catnip treats |
Clue 1
Addition
We found some shells. Let us add them up to find the 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.
T
11
17
7
6
5
7
19
8
3
T
11
17
12
7
15
13
18
7
6
5
18
T
11
T
11
18
6
6
6
17
7
14
14
6
5 + 6 =T
5 + 3 =K
3 + 9 =I
4 + 2 =S
7 + 6 =D
11 + 7 =O
8 + 9 =H
3 + 2 =N
2 + 1 =Y
11 + 4 =F
2 + 5 =E
8 + 6 =L
14 + 5 =A
0/13 letters found
Clue 2
Skip counting
We see starfish on the path. Let us skip count by fives to follow them.
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
20
130
55
27
8
8
100
27
36
24
130
100
65
15
100
45
8
42
130
45
80
24
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110T
Skip-count by 5s. Fill the blank: 5, 10, 15, ___, 25, 30H
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, ___, 90, 100O
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, ___, 26, 28W
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, ___, 140, 150E
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, ___, 18, 21S
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65V
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55B
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, ___, 70, 75R
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, ___, 39, 42N
Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12L
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, ___, 45, 48U
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, ___, 110, 120A
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33I
0/14 letters found
Clue 3
Word problems
The ocean kittens are telling a story. Solve it to see the next clue.
Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.
Someonescaredthevillainoffwith .
S
22
10
20
40
24
6
20
12
12
O
12
S
22
Marina the Mermaid found 2 sparkle cones yesterday and 20 more today. How many sparkle cones in all?S
Marina the Mermaid found 14 rainbow pearls yesterday and 6 more today. How many rainbow pearls in all?I
There were 16 starfish. 6 were used up. How many starfish are left?H
There were 14 starfish. 8 were used up. How many starfish are left?M
Marina the Mermaid lined up 4 rows of 10 starfish. How many starfish in all?N
Marina the Mermaid lined up 2 rows of 6 sparkle cones. How many sparkle cones in all?R
There were 28 starfish. 4 were used up. How many starfish are left?Y
0/7 letters found
Clue 4
Subtraction
Some shiny pearls fell into the deep water. Take them away to see what is left.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
W
18
11
13
6
8
12
10
15
8
4
15
3
11
14
2
12
11
7
2
5
4
2
17
17
7
11
16
1
11
12
11
19 - 1 =W
12 - 1 =E
18 - 4 =M
19 - 2 =T
20 - 4 =S
20 - 5 =P
10 - 9 =C
19 - 6 =F
12 - 2 =D
11 - 9 =A
14 - 2 =N
15 - 8 =H
6 - 1 =I
16 - 8 =U
8 - 5 =L
10 - 6 =R
14 - 8 =O
0/17 letters found
Clue 5
Missing addends — the last clue
We have some treats. How many more do we need to make ten?
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
9 + ___ = 13
3 + ___ = 14
3 + ___ = 10
10 + ___ = 20
1 + ___ = 10
4 + ___ = 6
1 + ___ = 13
7 + ___ = 10
7 + ___ = 8
3 + ___ = 8
3 + ___ = 11
Step 2 — cross out the sentence with each answer
1.The villain sends out a soft purr wave, then sings a sweet sea song.
2.The villain makes a giant tail splash, then starts a quick sand dig.
3.The villain uses their horn glow, then tries a fast kelp spin.
4.The villain makes a giant tail splash, then tries a fast kelp spin.
5.The villain sends out a soft purr wave, then starts a quick sand dig.
6.The villain makes a giant tail splash, then sings a sweet sea song.
7.The villain makes a big bubble dash, then tries a fast kelp spin.
8.The villain makes a big bubble dash, then sings a sweet sea song.
9.The villain makes a giant tail splash, then does a high mist jump.
10.The villain makes a big bubble dash, then starts a quick sand dig.
11.The villain fires a bright star blast, then does a high mist jump.
12.The villain sends out a soft purr wave, then tries a fast kelp spin.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Case of the Sparkle Crown
Culprit: Lily (tail splash · sea song · wears blue bow · purple mane · shiny mirrors)
- Clue 1 (Addition): "THE SNEAKY THIEF DOES NOT TOSS SHELLS"5 + 6 = 11 (T) · 5 + 3 = 8 (K) · 3 + 9 = 12 (I) · 4 + 2 = 6 (S) · 7 + 6 = 13 (D) · 11 + 7 = 18 (O) · 8 + 9 = 17 (H) · 3 + 2 = 5 (N) · 2 + 1 = 3 (Y) · 11 + 4 = 15 (F) · 2 + 5 = 7 (E) · 8 + 6 = 14 (L) · 14 + 5 = 19 (A)
- Clue 2 (Skip counting): "THE VILLAIN WEARS A BLUE BOW"Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110 = 90 (T) · Skip-count by 5s. Fill the blank: 5, 10, 15, ___, 25, 30 = 20 (H) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, ___, 90, 100 = 80 (O) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, ___, 26, 28 = 24 (W) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, ___, 140, 150 = 130 (E) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, ___, 18, 21 = 15 (S) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65 = 55 (V) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55 = 45 (B) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, ___, 70, 75 = 65 (R) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, ___, 39, 42 = 36 (N) · Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12 = 8 (L) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, ___, 45, 48 = 42 (U) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, ___, 110, 120 = 100 (A) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33 = 27 (I)
- Clue 3 (Word problems): "SHINY MIRRORS"Marina the Mermaid found 2 sparkle cones yesterday and 20 more today. How many sparkle cones in all? = 22 (S) · Marina the Mermaid found 14 rainbow pearls yesterday and 6 more today. How many rainbow pearls in all? = 20 (I) · There were 16 starfish. 6 were used up. How many starfish are left? = 10 (H) · There were 14 starfish. 8 were used up. How many starfish are left? = 6 (M) · Marina the Mermaid lined up 4 rows of 10 starfish. How many starfish in all? = 40 (N) · Marina the Mermaid lined up 2 rows of 6 sparkle cones. How many sparkle cones in all? = 12 (R) · There were 28 starfish. 4 were used up. How many starfish are left? = 24 (Y)
- Clue 4 (Subtraction): "WE FOUND PURPLE MANE HAIR AT THE SCENE"19 - 1 = 18 (W) · 12 - 1 = 11 (E) · 18 - 4 = 14 (M) · 19 - 2 = 17 (T) · 20 - 4 = 16 (S) · 20 - 5 = 15 (P) · 10 - 9 = 1 (C) · 19 - 6 = 13 (F) · 12 - 2 = 10 (D) · 11 - 9 = 2 (A) · 14 - 2 = 12 (N) · 15 - 8 = 7 (H) · 6 - 1 = 5 (I) · 16 - 8 = 8 (U) · 8 - 5 = 3 (L) · 10 - 6 = 4 (R) · 14 - 8 = 6 (O)
- Clue 5 (Missing addends): surviving statement (box 6) → Lily9 + ___ = 13 = 4 · 3 + ___ = 14 = 11 · 3 + ___ = 10 = 7 · 10 + ___ = 20 = 10 · 1 + ___ = 10 = 9 · 4 + ___ = 6 = 2 · 1 + ___ = 13 = 12 · 7 + ___ = 10 = 3 · 7 + ___ = 8 = 1 · 3 + ___ = 8 = 5 · 3 + ___ = 11 = 8
About this mystery
- Grade level
- Grade 1 math
- Math topics
- Addition, Skip counting, Word problems, Subtraction, Missing addends
- Reading level
- grades 1-2
- Theme
- The Case of the Sparkle Crown — set in Sparkle Cove
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects