🌊 Mermaids, UnicornsGrade 6Reading: grades 1-2MultiplicationWord problemsAdditionPercentagesDivision
The Mystery of the Missing Pearl Crown
A sneaky sea bandit swiped the Royal Pearl Crown from the underwater meadow. Detective, use your clues to find out who 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 Spell | Ocean Gear | Wand Hand | Tail Color | Weakness |
|---|---|---|---|---|---|
| Sandy | Bubble Blast | Prism Ring | Right Wand | Purple Tail | Bright Light |
| Marina | Pearl Glow | Kelp Cloak | Right Wand | Pink Tail | Bright Light |
| Misty | Wave Whistle | Golden Net | Left Wand | Pink Tail | Bright Light |
| Siren | Tide Twirl | Coral Wand | Right Wand | Pink Tail | Bright Light |
| Coral | Wave Whistle | Golden Net | Left Wand | Pink Tail | Glitter Dust |
| Cascada | Wave Whistle | Coral Wand | Right Wand | Purple Tail | Bright Light |
| Triton | Bubble Blast | Coral Wand | Left Wand | Purple Tail | Glitter Dust |
| Bubbles | Star Sparkle | Prism Ring | Left Wand | Pink Tail | Glitter Dust |
| Oceanus | Wave Whistle | Prism Ring | Right Wand | Blue Tail | Tickle Weed |
| Ripple | Tide Twirl | Coral Wand | Left Wand | Pink Tail | Tickle Weed |
| Wave | Bubble Blast | Kelp Cloak | Right Wand | Pink Tail | Tickle Weed |
| Glimmer | Bubble Blast | Shell Shield | Left Wand | Purple Tail | Tickle Weed |
| Starla | Bubble Blast | Shell Shield | Left Wand | Pink Tail | Tickle Weed |
| Kelp | Wave Whistle | Prism Ring | Right Wand | Blue Tail | Glitter Dust |
| Ariel | Bubble Blast | Prism Ring | Right Wand | Pink Tail | Glitter Dust |
| Shelly | Tide Twirl | Shell Shield | Right Wand | Pink Tail | Bright Light |
| Delphina | Tide Twirl | Coral Wand | Right Wand | Blue Tail | Tickle Weed |
| Nautica | Bubble Blast | Golden Net | Right Wand | Purple Tail | Bright Light |
| Coraline | Pearl Glow | Prism Ring | Left Wand | Purple Tail | Tickle Weed |
| Splash | Pearl Glow | Coral Wand | Right Wand | Pink Tail | Bright Light |
| Finley | Pearl Glow | Shell Shield | Right Wand | Pink Tail | Bright Light |
Clue 1
Multiplication facts (1-12)
The sea pony guard saw rows of shiny clam shells on the reef floor. Multiply to count the total shells and get Clue 1!
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
96
28
4
14
60
10
10
44
60
77
132
22
4
16
77
22
T
96
27
16
4
44
54
4
10
5
121
10
22
44
54
8 × 12 =T
7 × 2 =V
11 × 4 =A
1 × 10 =L
2 × 2 =E
11 × 11 =C
11 × 2 =O
2 × 8 =S
7 × 4 =H
3 × 9 =U
5 × 1 =P
6 × 9 =K
11 × 7 =N
12 × 11 =D
6 × 10 =I
0/15 letters found
Clue 2
Word problems
Detective Starla reads the sea turtle report about missing pearls. Solve the story problem to uncover Clue 2!
Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.
Awitnesssawthevillainwas .
R
45
14
95
12
15
86
99
N
D
Guppy lined up 5 rows of 9 unicorn horns. How many unicorn horns in all?R
There were 108 glitter shells. 13 were used up. How many glitter shells are left?G
Guppy lined up 9 rows of 11 magic pearls. How many magic pearls in all?A
There were 20 magic pearls. 8 were used up. How many magic pearls are left?H
Guppy lined up 7 rows of 2 unicorn horns. How many unicorn horns in all?I
There were 117 magic pearls. 31 were used up. How many magic pearls are left?W
There were 19 magic pearls. 4 were used up. How many magic pearls are left?T
0/7 letters found
Clue 3
Addition
You tally up all the glowing starfish collected along the kelp bed. Add them together to unlock Clue 3!
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
B
7599
8526
9130
2674
5997
8376
3943
9130
2674
5997
8376
B
7599
3943
9130
9578
2475
9151
2475
8376
5997
9151
9151
9232
9130
3943
8376
5997
9130
9151
9467
2549 + 5050 =B
1232 + 2711 =L
1795 + 879 =G
3035 + 2962 =H
5397 + 4070 =F
5938 + 3192 =I
6071 + 3507 =N
4754 + 4478 =V
6274 + 2877 =E
5436 + 3090 =R
1440 + 1035 =D
3167 + 5209 =T
0/12 letters found
Clue 4
Percentages
The magical water meter shows how much coral magic is left. Calculate the percentage to reveal Clue 4!
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
A
33
31
18
10
22
3
14
A
33
44
16
30
A
33
3
39
36
20
10
17
10
16
A
33
29
43
13
16
44
36
14
22
16
29
50% of 66 =A
25% of 80 =U
10% of 440 =L
50% of 58 =R
20% of 180 =O
40% of 45 =I
10% of 130 =H
60% of 5 =S
25% of 120 =W
50% of 78 =F
25% of 124 =P
20% of 80 =E
10% of 170 =D
25% of 40 =N
5% of 280 =C
50% of 86 =T
5% of 440 =K
0/17 letters found
Clue 5
Division facts (1-12) — the last clue
The mermaids share the rescue snacks into equal seashell bowls. Divide the treats evenly to find Clue 5!
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
21 ÷ 7 = ?
120 ÷ 12 = ?
36 ÷ 3 = ?
18 ÷ 3 = ?
5 ÷ 1 = ?
8 ÷ 1 = ?
20 ÷ 10 = ?
22 ÷ 2 = ?
63 ÷ 9 = ?
90 ÷ 10 = ?
48 ÷ 12 = ?
Step 2 — cross out the sentence with each answer
1.The villain made a pearl glow, then waved a coral wand.
2.The villain spun a tide twirl, then flashed a prism ring.
3.The villain spun a tide twirl, then raised a shell shield.
4.The villain shot a bubble blast, then swung a golden net.
5.The villain shot a bubble blast, then raised a shell shield.
6.The villain shone a star sparkle, then flashed a prism ring.
7.The villain blew a wave whistle, then hid in a kelp cloak.
8.The villain shone a star sparkle, then waved a coral wand.
9.The villain shot a bubble blast, then hid in a kelp cloak.
10.The villain spun a tide twirl, then waved a coral wand.
11.The villain made a pearl glow, then flashed a prism ring.
12.The villain made a pearl glow, then raised a shell shield.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Mystery of the Missing Pearl Crown
Culprit: Splash (Pearl Glow · Coral Wand · Right Wand · Pink Tail · Bright Light)
- Clue 1 (Multiplication facts (1-12)): "THE VILLAIN DOES NOT USE A KELP CLOAK"8 × 12 = 96 (T) · 7 × 2 = 14 (V) · 11 × 4 = 44 (A) · 1 × 10 = 10 (L) · 2 × 2 = 4 (E) · 11 × 11 = 121 (C) · 11 × 2 = 22 (O) · 2 × 8 = 16 (S) · 7 × 4 = 28 (H) · 3 × 9 = 27 (U) · 5 × 1 = 5 (P) · 6 × 9 = 54 (K) · 11 × 7 = 77 (N) · 12 × 11 = 132 (D) · 6 × 10 = 60 (I)
- Clue 2 (Word problems): "RIGHT WAND"Guppy lined up 5 rows of 9 unicorn horns. How many unicorn horns in all? = 45 (R) · There were 108 glitter shells. 13 were used up. How many glitter shells are left? = 95 (G) · Guppy lined up 9 rows of 11 magic pearls. How many magic pearls in all? = 99 (A) · There were 20 magic pearls. 8 were used up. How many magic pearls are left? = 12 (H) · Guppy lined up 7 rows of 2 unicorn horns. How many unicorn horns in all? = 14 (I) · There were 117 magic pearls. 31 were used up. How many magic pearls are left? = 86 (W) · There were 19 magic pearls. 4 were used up. How many magic pearls are left? = 15 (T)
- Clue 3 (Addition): "BRIGHT LIGHT BLINDED THE EVIL THIEF"2549 + 5050 = 7599 (B) · 1232 + 2711 = 3943 (L) · 1795 + 879 = 2674 (G) · 3035 + 2962 = 5997 (H) · 5397 + 4070 = 9467 (F) · 5938 + 3192 = 9130 (I) · 6071 + 3507 = 9578 (N) · 4754 + 4478 = 9232 (V) · 6274 + 2877 = 9151 (E) · 5436 + 3090 = 8526 (R) · 1440 + 1035 = 2475 (D) · 3167 + 5209 = 8376 (T)
- Clue 4 (Percentages): "A PINK SCALE WAS FOUND NEAR THE LOCKER"50% of 66 = 33 (A) · 25% of 80 = 20 (U) · 10% of 440 = 44 (L) · 50% of 58 = 29 (R) · 20% of 180 = 36 (O) · 40% of 45 = 18 (I) · 10% of 130 = 13 (H) · 60% of 5 = 3 (S) · 25% of 120 = 30 (W) · 50% of 78 = 39 (F) · 25% of 124 = 31 (P) · 20% of 80 = 16 (E) · 10% of 170 = 17 (D) · 25% of 40 = 10 (N) · 5% of 280 = 14 (C) · 50% of 86 = 43 (T) · 5% of 440 = 22 (K)
- Clue 5 (Division facts (1-12)): surviving statement (box 1) → Splash21 ÷ 7 = 3 · 120 ÷ 12 = 10 · 36 ÷ 3 = 12 · 18 ÷ 3 = 6 · 5 ÷ 1 = 5 · 8 ÷ 1 = 8 · 20 ÷ 10 = 2 · 22 ÷ 2 = 11 · 63 ÷ 9 = 7 · 90 ÷ 10 = 9 · 48 ÷ 12 = 4
About this mystery
- Grade level
- Grade 6 math
- Math topics
- Multiplication, Word problems, Addition, Percentages, Division
- Reading level
- grades 1-2
- Theme
- The Mystery of the Missing Pearl Crown — set in Coral Meadow Reef
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects