🌊 MermaidsGrade 3Reading: grades 3-4AdditionSubtractionMultiplicationWord problemsDivision
The Case of the Missing Glitter Pearl
A sneaky sea thief has stolen the legendary Glitter Pearl from Coral Cove! The Royal Pearl Keeper needs your help to search the reef and track down the culprit before the coral loses its magical glow.
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 | Sea Spell | Deep-Sea Gear | Clam Watch Wrist | Ocean Hair Color | Ocean Distraction |
|---|---|---|---|---|---|
| Attina | tidal wave blast | sea glass lens | right wrist watch | coral pink | tickly starfish |
| Talia | fast current glide | pearl crown | right wrist watch | ocean blue | noisy hermit crab |
| Nerida | whirlpool swirl | sea glass lens | left wrist watch | ocean blue | tickly starfish |
| Adella | jellyfish sting | coral wand | left wrist watch | ocean blue | bright lanternfish |
| Pearl | jellyfish sting | coral wand | left wrist watch | coral pink | tickly starfish |
| Coral | whirlpool swirl | coral wand | left wrist watch | seaweed green | tickly starfish |
| Melody | bubble shield | coral wand | left wrist watch | coral pink | tickly starfish |
| Ariel | jellyfish sting | kelp lasso | left wrist watch | coral pink | tickly starfish |
| Sirena | jellyfish sting | shell shield | left wrist watch | coral pink | tickly starfish |
| Triton | fast current glide | coral wand | right wrist watch | ocean blue | noisy hermit crab |
| Marina | whirlpool swirl | kelp lasso | left wrist watch | seaweed green | bright lanternfish |
| Poseidon | bubble shield | kelp lasso | left wrist watch | coral pink | bright lanternfish |
| Caspian | tidal wave blast | kelp lasso | right wrist watch | seaweed green | noisy hermit crab |
| Alana | bubble shield | kelp lasso | left wrist watch | ocean blue | bright lanternfish |
| Shelly | jellyfish sting | pearl crown | right wrist watch | ocean blue | tickly starfish |
| Muriel | fast current glide | sea glass lens | right wrist watch | coral pink | tickly starfish |
| Coralia | jellyfish sting | coral wand | left wrist watch | seaweed green | tickly starfish |
| Sandy | whirlpool swirl | coral wand | left wrist watch | coral pink | tickly starfish |
| Delphine | whirlpool swirl | pearl crown | left wrist watch | coral pink | noisy hermit crab |
| Andrina | fast current glide | shell shield | left wrist watch | seaweed green | bright lanternfish |
| Arista | fast current glide | kelp lasso | left wrist watch | seaweed green | noisy hermit crab |
Clue 1
Addition
We need to count all the yellow shells on the reef. Let us add the shell piles together to open this clamshell!
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
847
658
741
T
847
658
610
741
416
902
339
741
297
471
339
T
847
805
297
741
518
560
741
313
757
313
518
297
297
339
538 + 309 =T
384 + 373 =P
263 + 395 =H
280 + 330 =I
148 + 268 =F
101 + 196 =S
308 + 497 =U
175 + 164 =O
284 + 234 =A
402 + 500 =D
107 + 206 =L
261 + 210 =N
298 + 262 =K
434 + 307 =E
0/14 letters found
Clue 2
Subtraction
A school of clownfish lost some friends in the seaweed. Subtract the missing fish to crack the sea chest lock.
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
223
383
A
223
168
519
663
383
A
223
245
245
671
792
168
168
431
797
792
471
168
663
431
202
431
489
168
383
576
898
245
168
413 - 190 =A
592 - 347 =S
800 - 224 =R
901 - 238 =H
697 - 314 =W
418 - 250 =T
640 - 121 =C
857 - 60 =D
831 - 360 =N
748 - 77 =P
1019 - 227 =O
1070 - 172 =I
517 - 28 =F
633 - 202 =E
297 - 95 =L
0/15 letters found
Clue 3
Multiplication facts (1-12)
The royal gardens have equal rows of sea anemones. Multiply the rows to find the secret path number!
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
72
120
60
49
84
77
12
42
120
A
72
9
90
60
42
40
64
A
72
84
110
42
120
40
110
120
40
60
110
90
11
60
11
11
77
110
8 × 9 =A
9 × 1 =R
10 × 4 =H
10 × 9 =F
2 × 6 =Y
7 × 7 =C
11 × 10 =E
6 × 7 =S
8 × 8 =M
12 × 7 =K
12 × 10 =T
12 × 5 =I
1 × 11 =G
11 × 7 =L
0/14 letters found
Clue 4
Word problems
The sea turtles have a word puzzle for us. Solve their tricky riddle about swimming distances to get the next clue.
Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.
Astrandof hairturnedupatthescene.
C
66
31
49
22
58
42
20
N
K
Sandy the Seahorse lined up 6 rows of 11 starfish. How many starfish in all?C
Sandy the Seahorse found 10 bubble blower yesterday and 48 more today. How many bubble blower in all?L
There were 89 sea shell. 40 were used up. How many sea shell are left?R
Sandy the Seahorse found 9 starfish yesterday and 22 more today. How many starfish in all?O
Sandy the Seahorse lined up 2 rows of 11 kelp leaf. How many kelp leaf in all?A
Sandy the Seahorse found 4 kelp leaf yesterday and 38 more today. How many kelp leaf in all?P
Sandy the Seahorse found 6 sea shell yesterday and 14 more today. How many sea shell in all?I
0/7 letters found
Clue 5
Division facts (1-12) — the last clue
Six hungry sea stars want to share the sparkly treats equally. Divide the treats to get the final clue!
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
6 ÷ 2 = ?
77 ÷ 7 = ?
22 ÷ 11 = ?
8 ÷ 2 = ?
10 ÷ 10 = ?
90 ÷ 9 = ?
20 ÷ 4 = ?
80 ÷ 10 = ?
63 ÷ 7 = ?
24 ÷ 2 = ?
42 ÷ 7 = ?
Step 2 — cross out the sentence with each answer
1.The villain activates a protective bubble shield, then polishes a stolen pearl crown.
2.The villain fires a zapping jellyfish sting, then blocks the path with a shell shield.
3.The villain activates a protective bubble shield, then waves a glowing coral wand.
4.The villain rides a fast current glide, then looks through a sea glass lens.
5.The villain fires a zapping jellyfish sting, then polishes a stolen pearl crown.
6.The villain creates a massive tidal wave blast, then blocks the path with a shell shield.
7.The villain summons a wild whirlpool swirl, then waves a glowing coral wand.
8.The villain summons a wild whirlpool swirl, then blocks the path with a shell shield.
9.The villain activates a protective bubble shield, then looks through a sea glass lens.
10.The villain rides a fast current glide, then swings a long kelp lasso.
11.The villain fires a zapping jellyfish sting, then waves a glowing coral wand.
12.The villain creates a massive tidal wave blast, then looks through a sea glass lens.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Case of the Missing Glitter Pearl
Culprit: Sandy (whirlpool swirl · coral wand · left wrist watch · coral pink · tickly starfish)
- Clue 1 (Addition): "THE THIEF DOES NOT USE A KELP LASSO"538 + 309 = 847 (T) · 384 + 373 = 757 (P) · 263 + 395 = 658 (H) · 280 + 330 = 610 (I) · 148 + 268 = 416 (F) · 101 + 196 = 297 (S) · 308 + 497 = 805 (U) · 175 + 164 = 339 (O) · 284 + 234 = 518 (A) · 402 + 500 = 902 (D) · 107 + 206 = 313 (L) · 261 + 210 = 471 (N) · 298 + 262 = 560 (K) · 434 + 307 = 741 (E)
- Clue 2 (Subtraction): "A WATCH WAS SPOTTED ON THE LEFT WRIST"413 - 190 = 223 (A) · 592 - 347 = 245 (S) · 800 - 224 = 576 (R) · 901 - 238 = 663 (H) · 697 - 314 = 383 (W) · 418 - 250 = 168 (T) · 640 - 121 = 519 (C) · 857 - 60 = 797 (D) · 831 - 360 = 471 (N) · 748 - 77 = 671 (P) · 1019 - 227 = 792 (O) · 1070 - 172 = 898 (I) · 517 - 28 = 489 (F) · 633 - 202 = 431 (E) · 297 - 95 = 202 (L)
- Clue 3 (Multiplication facts (1-12)): "A TICKLY STARFISH MAKES THE THIEF GIGGLE"8 × 9 = 72 (A) · 9 × 1 = 9 (R) · 10 × 4 = 40 (H) · 10 × 9 = 90 (F) · 2 × 6 = 12 (Y) · 7 × 7 = 49 (C) · 11 × 10 = 110 (E) · 6 × 7 = 42 (S) · 8 × 8 = 64 (M) · 12 × 7 = 84 (K) · 12 × 10 = 120 (T) · 12 × 5 = 60 (I) · 1 × 11 = 11 (G) · 11 × 7 = 77 (L)
- Clue 4 (Word problems): "CORAL PINK"Sandy the Seahorse lined up 6 rows of 11 starfish. How many starfish in all? = 66 (C) · Sandy the Seahorse found 10 bubble blower yesterday and 48 more today. How many bubble blower in all? = 58 (L) · There were 89 sea shell. 40 were used up. How many sea shell are left? = 49 (R) · Sandy the Seahorse found 9 starfish yesterday and 22 more today. How many starfish in all? = 31 (O) · Sandy the Seahorse lined up 2 rows of 11 kelp leaf. How many kelp leaf in all? = 22 (A) · Sandy the Seahorse found 4 kelp leaf yesterday and 38 more today. How many kelp leaf in all? = 42 (P) · Sandy the Seahorse found 6 sea shell yesterday and 14 more today. How many sea shell in all? = 20 (I)
- Clue 5 (Division facts (1-12)): surviving statement (box 7) → Sandy6 ÷ 2 = 3 · 77 ÷ 7 = 11 · 22 ÷ 11 = 2 · 8 ÷ 2 = 4 · 10 ÷ 10 = 1 · 90 ÷ 9 = 10 · 20 ÷ 4 = 5 · 80 ÷ 10 = 8 · 63 ÷ 7 = 9 · 24 ÷ 2 = 12 · 42 ÷ 7 = 6
About this mystery
- Grade level
- Grade 3 math
- Math topics
- Addition, Subtraction, Multiplication, Word problems, Division
- Reading level
- grades 3-4
- Theme
- The Case of the Missing Glitter Pearl — set in Coral Cove
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects