🏴☠️ PiratesGrade 10Reading: grades 7-9Fractions of a numberWord problemsRoundingPythagorean theorem
The Lost Treasure of Cutlass Cay
The Harbormaster's legendary golden compass has been stolen right out of his locked desk! A shady rebel captain was seen slipping away from the docks into the foggy night. You must piece together the navigation logs and crew roster to unmask the thief before they sail beyond the horizon.
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 | Signature Weapon | Sailing Gear | Steering Hand | Bandana Color | Phobia |
|---|---|---|---|---|---|
| Charlotte de Berry | Heavy Cutlass | Grappling Hook | Left Handed | Emerald Bandana | Fear of Depths |
| Jean Laffite | Flintlock Pistol | Pegleg Holster | Left Handed | Midnight Bandana | Fear of Storms |
| Blackbeard | Heavy Cutlass | Compass Charm | Left Handed | Emerald Bandana | Fear of Rats |
| Jacquotte Delahaye | Boarding Axe | Pegleg Holster | Right Handed | Emerald Bandana | Fear of Storms |
| Benjamin Hornigold | Dual Daggers | Compass Charm | Right Handed | Crimson Bandana | Fear of Rats |
| Samuel Bellamy | Dual Daggers | Leather Eyepatch | Left Handed | Emerald Bandana | Fear of Storms |
| Sadie Farrell | Flintlock Pistol | Compass Charm | Left Handed | Crimson Bandana | Fear of Rats |
| Grace O Malley | Brass Spyglass | Golden Pocketwatch | Left Handed | Emerald Bandana | Fear of Depths |
| Thomas Tew | Boarding Axe | Leather Eyepatch | Right Handed | Emerald Bandana | Fear of Storms |
| Howell Davis | Brass Spyglass | Compass Charm | Left Handed | Midnight Bandana | Fear of Depths |
| Bartholomew Roberts | Heavy Cutlass | Leather Eyepatch | Right Handed | Crimson Bandana | Fear of Depths |
| Mary Read | Boarding Axe | Pegleg Holster | Right Handed | Midnight Bandana | Fear of Rats |
| Stede Bonnet | Brass Spyglass | Grappling Hook | Left Handed | Emerald Bandana | Fear of Rats |
| Anne Bonny | Brass Spyglass | Leather Eyepatch | Left Handed | Crimson Bandana | Fear of Rats |
| Edward Low | Dual Daggers | Golden Pocketwatch | Right Handed | Emerald Bandana | Fear of Storms |
| Charles Vane | Heavy Cutlass | Leather Eyepatch | Left Handed | Midnight Bandana | Fear of Storms |
| Rachel Wall | Flintlock Pistol | Leather Eyepatch | Right Handed | Crimson Bandana | Fear of Storms |
| Edward England | Dual Daggers | Leather Eyepatch | Right Handed | Emerald Bandana | Fear of Storms |
| L orangeois | Heavy Cutlass | Pegleg Holster | Right Handed | Crimson Bandana | Fear of Rats |
| Calico Jack | Brass Spyglass | Pegleg Holster | Right Handed | Emerald Bandana | Fear of Storms |
| Francis Drake | Flintlock Pistol | Leather Eyepatch | Right Handed | Emerald Bandana | Fear of Depths |
Clue 1
Fractions of a number
The Quartermaster tracks the cargo crates loaded onto the ship, but some math is needed to find the hidden slip.
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
32
26
43
22
31
58
25
25
60
44
58
49
25
58
31
12
22
58
49
24
25
36
43
3
50
24
31
12
43
T
32
44
58
T
32
31
26
1/4 of 128 =T
2/5 of 150 =Y
2/4 of 72 =D
2/8 of 100 =L
4/5 of 55 =W
4/10 of 145 =A
3/6 of 86 =E
6/8 of 32 =O
2/8 of 196 =G
1/2 of 6 =N
4/8 of 44 =S
2/6 of 78 =H
5/10 of 100 =P
1/6 of 72 =K
2/6 of 93 =C
0/15 letters found
Clue 2
Word problems
We found a torn logbook page showing only a fraction of the gold coins spent at the port.
Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.
Awitnesssawthevillainwas .
R
84
79
27
26
100
26
56
12
D
E
D
There were 88 sea biscuits. 4 were used up. How many sea biscuits are left?R
There were 61 rum barrels. 35 were used up. How many rum barrels are left?H
Quartermaster found 37 iron cannons yesterday and 19 more today. How many iron cannons in all?A
Quartermaster lined up 3 rows of 9 iron cannons. How many iron cannons in all?G
Quartermaster lined up 10 rows of 10 doubloons. How many doubloons in all?T
Quartermaster lined up 3 rows of 4 iron cannons. How many iron cannons in all?N
Quartermaster found 2 doubloons yesterday and 77 more today. How many doubloons in all?I
0/7 letters found
Clue 3
Rounding
The ship's old mechanical depth gauge only registers whole leagues, requiring us to round the readings.
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
9000
30
1300
700
430
T
9000
500
3700
110
290
700
110
1300
130
1300
2000
3700
T
9000
T
9000
30
1300
370
700
430
4300
2000
700
900
T
9000
30
430
4300
2000
1300
130
Round 8,942 to the nearest thousandT
Round 4,306 to the nearest hundredN
Round 427 to the nearest tenU
Round 933 to the nearest hundredF
Round 30 to the nearest tenH
Round 129 to the nearest tenR
Round 368 to the nearest tenS
Round 290 to the nearest tenC
Round 107 to the nearest tenW
Round 3,675 to the nearest hundredA
Round 732 to the nearest hundredO
Round 2,409 to the nearest thousandD
Round 469 to the nearest hundredL
Round 1,326 to the nearest hundredE
0/14 letters found
Clue 4
Pythagorean theorem
We map the distance from the tall lighthouse to the anchored flagship using right triangles.
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
116
87
125
15
50
111
51
50
125
52
52
68
30
51
125
A
116
37
65
A
116
30
51
A
116
68
50
100
52
26
15
68
51
111
52
68
52
51
legs 80 and 84, hypotenuse =A
legs 25 and 60, hypotenuse =W
legs 32 and 60, hypotenuse =N
legs 24 and 45, hypotenuse =T
legs 12 and 35, hypotenuse =P
legs 30 and 40, hypotenuse =G
legs 28 and 96, hypotenuse =L
legs 20 and 48, hypotenuse =E
legs 9 and 12, hypotenuse =I
legs 35 and 120, hypotenuse =R
legs 36 and 105, hypotenuse =H
legs 10 and 24, hypotenuse =D
legs 18 and 24, hypotenuse =S
legs 60 and 63, hypotenuse =B
0/14 letters found
Clue 5
Fractions of a number — the last clue
A crew division chart shows exactly how many sailors got a share of the stolen silver.
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
3/8 of 8 = ?
2/3 of 6 = ?
1/10 of 10 = ?
1/3 of 33 = ?
1/10 of 120 = ?
2/8 of 32 = ?
6/10 of 15 = ?
1/2 of 10 = ?
2/8 of 8 = ?
3/10 of 20 = ?
2/3 of 15 = ?
Step 2 — cross out the sentence with each answer
1.The villain chopped with a boarding axe, then adjusted a leather eyepatch slowly.
2.The villain brandished a flintlock pistol, then adjusted a leather eyepatch slowly.
3.The villain chopped with a boarding axe, then tapped a pegleg holster on the deck.
4.The villain scouted with a brass spyglass, then tapped a pegleg holster on the deck.
5.The villain swung a heavy cutlass, then checked a golden pocketwatch.
6.The villain scouted with a brass spyglass, then slung a grappling hook over the side.
7.The villain flashed dual daggers, then adjusted a leather eyepatch slowly.
8.The villain flashed dual daggers, then slung a grappling hook over the side.
9.The villain brandished a flintlock pistol, then slung a grappling hook over the side.
10.The villain swung a heavy cutlass, then tapped a pegleg holster on the deck.
11.The villain chopped with a boarding axe, then slung a grappling hook over the side.
12.The villain brandished a flintlock pistol, then tapped a pegleg holster on the deck.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Lost Treasure of Cutlass Cay
Culprit: Edward England (Dual Daggers · Leather Eyepatch · Right Handed · Emerald Bandana · Fear of Storms)
- Clue 1 (Fractions of a number): "THE SCALLYWAG LACKS A GOLDEN POCKETWATCH"1/4 of 128 = 32 (T) · 2/5 of 150 = 60 (Y) · 2/4 of 72 = 36 (D) · 2/8 of 100 = 25 (L) · 4/5 of 55 = 44 (W) · 4/10 of 145 = 58 (A) · 3/6 of 86 = 43 (E) · 6/8 of 32 = 24 (O) · 2/8 of 196 = 49 (G) · 1/2 of 6 = 3 (N) · 4/8 of 44 = 22 (S) · 2/6 of 78 = 26 (H) · 5/10 of 100 = 50 (P) · 1/6 of 72 = 12 (K) · 2/6 of 93 = 31 (C)
- Clue 2 (Word problems): "RIGHT HANDED"There were 88 sea biscuits. 4 were used up. How many sea biscuits are left? = 84 (R) · There were 61 rum barrels. 35 were used up. How many rum barrels are left? = 26 (H) · Quartermaster found 37 iron cannons yesterday and 19 more today. How many iron cannons in all? = 56 (A) · Quartermaster lined up 3 rows of 9 iron cannons. How many iron cannons in all? = 27 (G) · Quartermaster lined up 10 rows of 10 doubloons. How many doubloons in all? = 100 (T) · Quartermaster lined up 3 rows of 4 iron cannons. How many iron cannons in all? = 12 (N) · Quartermaster found 2 doubloons yesterday and 77 more today. How many doubloons in all? = 79 (I)
- Clue 3 (Rounding): "THE OUTLAW COWERED AT THE SOUND OF THUNDER"Round 8,942 to the nearest thousand = 9000 (T) · Round 4,306 to the nearest hundred = 4300 (N) · Round 427 to the nearest ten = 430 (U) · Round 933 to the nearest hundred = 900 (F) · Round 30 to the nearest ten = 30 (H) · Round 129 to the nearest ten = 130 (R) · Round 368 to the nearest ten = 370 (S) · Round 290 to the nearest ten = 290 (C) · Round 107 to the nearest ten = 110 (W) · Round 3,675 to the nearest hundred = 3700 (A) · Round 732 to the nearest hundred = 700 (O) · Round 2,409 to the nearest thousand = 2000 (D) · Round 469 to the nearest hundred = 500 (L) · Round 1,326 to the nearest hundred = 1300 (E)
- Clue 4 (Pythagorean theorem): "A BRIGHT GREEN STRAP WAS TANGLED IN THE NET"legs 80 and 84, hypotenuse = 116 (A) · legs 25 and 60, hypotenuse = 65 (W) · legs 32 and 60, hypotenuse = 68 (N) · legs 24 and 45, hypotenuse = 51 (T) · legs 12 and 35, hypotenuse = 37 (P) · legs 30 and 40, hypotenuse = 50 (G) · legs 28 and 96, hypotenuse = 100 (L) · legs 20 and 48, hypotenuse = 52 (E) · legs 9 and 12, hypotenuse = 15 (I) · legs 35 and 120, hypotenuse = 125 (R) · legs 36 and 105, hypotenuse = 111 (H) · legs 10 and 24, hypotenuse = 26 (D) · legs 18 and 24, hypotenuse = 30 (S) · legs 60 and 63, hypotenuse = 87 (B)
- Clue 5 (Fractions of a number): surviving statement (box 7) → Edward England3/8 of 8 = 3 · 2/3 of 6 = 4 · 1/10 of 10 = 1 · 1/3 of 33 = 11 · 1/10 of 120 = 12 · 2/8 of 32 = 8 · 6/10 of 15 = 9 · 1/2 of 10 = 5 · 2/8 of 8 = 2 · 3/10 of 20 = 6 · 2/3 of 15 = 10
About this mystery
- Grade level
- Grade 10 math
- Math topics
- Fractions of a number, Word problems, Rounding, Pythagorean theorem
- Reading level
- grades 7-9
- Theme
- The Lost Treasure of Cutlass Cay — set in Scurvy Harbor
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects