🏴☠️ Mermaids kidnapped by PirateGrade 6Reading: grades 5-6Place valueMultiplicationRoundingBar modelsDivision
The Coral Cove Rescue
A sneaky rogue captain trapped the Pearl Guardian inside an iron deck cage! Work through the ship clues to track down the culprit and set the mermaid free.
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 | Primary Weapon | Pirate Gear | Dominant Hand | Captured Trace | Defensive Vulnerability |
|---|---|---|---|---|---|
| Marina Salt | Bubble Cannon | Iron Hook Hand | Left Handed | Seaweed Green | Bright Flash |
| Seafoam Sam | Anchor Cannon | Parrot Scout | Right Handed | Deep Blue | Bright Flash |
| Hector Hook | Anchor Cannon | Parrot Scout | Left Handed | Coral Pink | Bright Flash |
| Shelly Sands | Bubble Cannon | Brass Spyglass | Left Handed | Coral Pink | Loud Whistle |
| Morgan Wave | Steel Cutlass | Iron Hook Hand | Right Handed | Seaweed Green | Loud Whistle |
| Mako Mike | Net Thrower | Ancient Compass | Right Handed | Seaweed Green | Loud Whistle |
| Captain Calico | Trident Blaster | Iron Hook Hand | Left Handed | Deep Blue | Loud Whistle |
| Nerida Splash | Bubble Cannon | Ancient Compass | Left Handed | Deep Blue | Lemon Juice |
| Sandy Shore | Bubble Cannon | Ancient Compass | Left Handed | Deep Blue | Bright Flash |
| Pearl Fin | Trident Blaster | Fog Horn | Left Handed | Deep Blue | Lemon Juice |
| Triton Tim | Trident Blaster | Ancient Compass | Right Handed | Coral Pink | Bright Flash |
| Captain Hooke | Bubble Cannon | Iron Hook Hand | Left Handed | Deep Blue | Bright Flash |
| Finn Splash | Net Thrower | Parrot Scout | Right Handed | Seaweed Green | Loud Whistle |
| Coral Reef | Anchor Cannon | Ancient Compass | Right Handed | Deep Blue | Bright Flash |
| Goby Gale | Net Thrower | Fog Horn | Right Handed | Seaweed Green | Lemon Juice |
| Urchin Utley | Net Thrower | Parrot Scout | Left Handed | Deep Blue | Bright Flash |
| Jack Kelp | Bubble Cannon | Brass Spyglass | Left Handed | Deep Blue | Bright Flash |
| Scarlet Scourge | Steel Cutlass | Ancient Compass | Left Handed | Coral Pink | Bright Flash |
| Bluebeard Bob | Anchor Cannon | Brass Spyglass | Left Handed | Deep Blue | Bright Flash |
| Anchor Andy | Anchor Cannon | Fog Horn | Right Handed | Seaweed Green | Loud Whistle |
| Caspian Crest | Trident Blaster | Iron Hook Hand | Left Handed | Seaweed Green | Lemon Juice |
Clue 1
Place value
You decode the pirate ship logbook by finding the correct place value 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
80
900
200
40
60
800
7000
T
80
200
9000
7000
40
T
80
7000
60
70
10
5000
200
20
70
5000
T
80
500
20
200
7000
70
9000
60
200
70
T
80
9000
5000
1000
40
7000
20
20
What is the value of the 8 in 95,389?T
What is the value of the 9 in 805,951?H
What is the value of the 4 in 998,242?P
What is the value of the 8 in 41,814?R
What is the value of the 5 in 975,299?O
What is the value of the 9 in 279,681?C
What is the value of the 2 in 393,264?E
What is the value of the 6 in 350,165?I
What is the value of the 7 in 217,852?A
What is the value of the 7 in 395,379?N
What is the value of the 2 in 381,520?S
What is the value of the 1 in 680,518?D
What is the value of the 1 in 721,644?M
What is the value of the 5 in 328,588?U
0/14 letters found
Clue 2
Multiplication facts (1-12)
You count the locked cages hanging in rows on the deck to find the total sum.
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
10
108
40
12
5
66
66
66
6
W
10
4
6
21
40
6
108
12
66
W
10
64
18
25
7
108
8
45
40
36
5
7
40
45
6
12
25
5
25
10 × 1 =W
1 × 7 =F
7 × 3 =P
2 × 4 =G
5 × 9 =H
8 × 5 =T
1 × 5 =E
4 × 9 =L
3 × 6 =R
8 × 8 =O
12 × 9 =I
5 × 5 =D
6 × 11 =S
4 × 1 =C
1 × 6 =A
3 × 4 =N
0/16 letters found
Clue 3
Rounding
The ship depth gauge is rusty and only displays rounded numbers.
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
20
70
2300
30
7000
430
T
20
7000
700
130
90
7000
2000
4300
2900
700
130
1700
2300
1700
4300
300
7000
4300
200
700
3700
70
T
20
50
2900
7000
2000
70
Round 16 to the nearest tenT
Round 232 to the nearest hundredR
Round 33 to the nearest tenC
Round 127 to the nearest tenN
Round 434 to the nearest tenP
Round 1,729 to the nearest hundredD
Round 50 to the nearest tenF
Round 1,639 to the nearest thousandS
Round 2,862 to the nearest hundredL
Round 712 to the nearest hundredI
Round 68 to the nearest tenH
Round 2,278 to the nearest hundredE
Round 87 to the nearest tenW
Round 4,342 to the nearest hundredB
Round 287 to the nearest hundredY
Round 3,711 to the nearest hundredG
Round 6,790 to the nearest thousandA
0/17 letters found
Clue 4
Bar model word problems
You draw bar models to compare the stolen treasure chests between two crews.
Draw a bar model to solve each word problem. Its answer reveals a letter — write the letters in the boxes to fill in the missing word.
Astrandofhairturnedupatthescene.
D
117
57
57
78
70
53
63
57
Quartermaster shares 234 glowing pearls equally among 2 teams. How many glowing pearls does each team get?
draw a bar model
Answer:→D
Quartermaster used 1/3 of the glowing pearls on the first day. The other 38 glowing pearls were used the next day. How many glowing pearls were there in all?
draw a bar model
Answer:→E
Quartermaster has 10 times as many glowing pearls as a teammate. The teammate has 7 glowing pearls. How many glowing pearls does Quartermaster have?
draw a bar model
Answer:→B
The red team has 69 potted sea kelp and the blue team has 16 potted sea kelp. How many more potted sea kelp does the red team have?
draw a bar model
Answer:→L
There were 78 shell necklaces in all. 15 shell necklaces were used. How many shell necklaces are left?
draw a bar model
Answer:→U
Quartermaster has 234 potted sea kelp, packed 3 to a bag. How many bags can be filled?
draw a bar model
Answer:→P
0/6 letters found
Clue 5
Division facts (1-12) — the last clue
The crew splits their plunder into equal groups to prepare for sailing.
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
25 ÷ 5 = ?
121 ÷ 11 = ?
49 ÷ 7 = ?
4 ÷ 1 = ?
16 ÷ 2 = ?
2 ÷ 1 = ?
18 ÷ 6 = ?
72 ÷ 8 = ?
54 ÷ 9 = ?
100 ÷ 10 = ?
1 ÷ 1 = ?
Step 2 — cross out the sentence with each answer
1.The villain brandished the steel cutlass, then slashed with the iron hook hand.
2.The villain dropped the heavy anchor cannon, then checked the ancient compass.
3.The villain fired the bubble cannon, then checked the ancient compass.
4.The villain dropped the heavy anchor cannon, then sent out the screeching parrot scout.
5.The villain threw the heavy net thrower, then sent out the screeching parrot scout.
6.The villain fired the bubble cannon, then blared the loud fog horn.
7.The villain fired the bubble cannon, then scouted with the brass spyglass.
8.The villain zapped with the trident blaster, then slashed with the iron hook hand.
9.The villain threw the heavy net thrower, then scouted with the brass spyglass.
10.The villain dropped the heavy anchor cannon, then slashed with the iron hook hand.
11.The villain fired the bubble cannon, then slashed with the iron hook hand.
12.The villain dropped the heavy anchor cannon, then scouted with the brass spyglass.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Coral Cove Rescue
Culprit: Bluebeard Bob (Anchor Cannon · Brass Spyglass · Left Handed · Deep Blue · Bright Flash)
- Clue 1 (Place value): "THE PIRATE CAPTAIN DOES NOT USE ANCIENT COMPASS"What is the value of the 8 in 95,389? = 80 (T) · What is the value of the 9 in 805,951? = 900 (H) · What is the value of the 4 in 998,242? = 40 (P) · What is the value of the 8 in 41,814? = 800 (R) · What is the value of the 5 in 975,299? = 5000 (O) · What is the value of the 9 in 279,681? = 9000 (C) · What is the value of the 2 in 393,264? = 200 (E) · What is the value of the 6 in 350,165? = 60 (I) · What is the value of the 7 in 217,852? = 7000 (A) · What is the value of the 7 in 395,379? = 70 (N) · What is the value of the 2 in 381,520? = 20 (S) · What is the value of the 1 in 680,518? = 10 (D) · What is the value of the 1 in 721,644? = 1000 (M) · What is the value of the 5 in 328,588? = 500 (U)
- Clue 2 (Multiplication facts (1-12)): "WITNESS SAW CAPTAIN SWORD FIGHT LEFT HANDED"10 × 1 = 10 (W) · 1 × 7 = 7 (F) · 7 × 3 = 21 (P) · 2 × 4 = 8 (G) · 5 × 9 = 45 (H) · 8 × 5 = 40 (T) · 1 × 5 = 5 (E) · 4 × 9 = 36 (L) · 3 × 6 = 18 (R) · 8 × 8 = 64 (O) · 12 × 9 = 108 (I) · 5 × 5 = 25 (D) · 6 × 11 = 66 (S) · 4 × 1 = 4 (C) · 1 × 6 = 6 (A) · 3 × 4 = 12 (N)
- Clue 3 (Rounding): "THE CAPTAIN WAS BLINDED BY A BRIGHT FLASH"Round 16 to the nearest ten = 20 (T) · Round 232 to the nearest hundred = 200 (R) · Round 33 to the nearest ten = 30 (C) · Round 127 to the nearest ten = 130 (N) · Round 434 to the nearest ten = 430 (P) · Round 1,729 to the nearest hundred = 1700 (D) · Round 50 to the nearest ten = 50 (F) · Round 1,639 to the nearest thousand = 2000 (S) · Round 2,862 to the nearest hundred = 2900 (L) · Round 712 to the nearest hundred = 700 (I) · Round 68 to the nearest ten = 70 (H) · Round 2,278 to the nearest hundred = 2300 (E) · Round 87 to the nearest ten = 90 (W) · Round 4,342 to the nearest hundred = 4300 (B) · Round 287 to the nearest hundred = 300 (Y) · Round 3,711 to the nearest hundred = 3700 (G) · Round 6,790 to the nearest thousand = 7000 (A)
- Clue 4 (Bar model word problems): "DEEP BLUE"Quartermaster shares 234 glowing pearls equally among 2 teams. How many glowing pearls does each team get? = 117 (D) · Quartermaster used 1/3 of the glowing pearls on the first day. The other 38 glowing pearls were used the next day. How many glowing pearls were there in all? = 57 (E) · Quartermaster has 10 times as many glowing pearls as a teammate. The teammate has 7 glowing pearls. How many glowing pearls does Quartermaster have? = 70 (B) · The red team has 69 potted sea kelp and the blue team has 16 potted sea kelp. How many more potted sea kelp does the red team have? = 53 (L) · There were 78 shell necklaces in all. 15 shell necklaces were used. How many shell necklaces are left? = 63 (U) · Quartermaster has 234 potted sea kelp, packed 3 to a bag. How many bags can be filled? = 78 (P)
- Clue 5 (Division facts (1-12)): surviving statement (box 12) → Bluebeard Bob25 ÷ 5 = 5 · 121 ÷ 11 = 11 · 49 ÷ 7 = 7 · 4 ÷ 1 = 4 · 16 ÷ 2 = 8 · 2 ÷ 1 = 2 · 18 ÷ 6 = 3 · 72 ÷ 8 = 9 · 54 ÷ 9 = 6 · 100 ÷ 10 = 10 · 1 ÷ 1 = 1
About this mystery
- Grade level
- Grade 6 math
- Math topics
- Place value, Multiplication, Rounding, Bar models, Division
- Reading level
- grades 5-6
- Theme
- The Coral Cove Rescue — set in Skull Rock Lagoon
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects