🏴☠️ PiratesGrade 5Reading: grades 5-6RoundingMultiplicationWord problemsFractions of a numberDivision
The Mystery of the Stolen Star Chart
A mysterious rogue captain slipped into Blackstone Cove at midnight and swiped the ancient Star Chart! Search the clues left across the harbor to unmask the culprit before they sail away.
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 Flag | Dominant Hand | Beard Style | Feared Creature |
|---|---|---|---|---|---|
| John Jennings | Grappling Hook | Crowned Skull Flag | Right Handed | Braided Beard | Giant Squid |
| Bartholomeu | Cutlass | Anchor Banner | Left Handed | Trimmed Stubble | Giant Squid |
| George Lowther | Boarding Axe | Anchor Banner | Right Handed | Bushy Beard | Siren Song |
| Captain Kidd | Blunderbuss | Golden Compass Flag | Left Handed | Braided Beard | Screeching Parrot |
| Francois lOllonais | Flintlock | Crowned Skull Flag | Right Handed | Braided Beard | Screeching Parrot |
| Howell Davis | Grappling Hook | Sea Serpent Flag | Right Handed | Trimmed Stubble | Siren Song |
| Blackbeard | Cutlass | Golden Compass Flag | Left Handed | Braided Beard | Siren Song |
| Christopher Myngs | Flintlock | Anchor Banner | Left Handed | Braided Beard | Giant Squid |
| Henry Morgan | Blunderbuss | Anchor Banner | Right Handed | Braided Beard | Giant Squid |
| Woodes Rogers | Grappling Hook | Jolly Roger Banner | Left Handed | Braided Beard | Giant Squid |
| Anne Bonny | Boarding Axe | Sea Serpent Flag | Left Handed | Trimmed Stubble | Screeching Parrot |
| Stede Bonnet | Flintlock | Golden Compass Flag | Left Handed | Trimmed Stubble | Giant Squid |
| Calico Jack | Blunderbuss | Jolly Roger Banner | Left Handed | Braided Beard | Giant Squid |
| John Esquemeling | Grappling Hook | Golden Compass Flag | Right Handed | Bushy Beard | Giant Squid |
| Thomas Tew | Flintlock | Jolly Roger Banner | Right Handed | Bushy Beard | Screeching Parrot |
| Grace OMalley | Cutlass | Anchor Banner | Left Handed | Braided Beard | Giant Squid |
| Edward Low | Flintlock | Sea Serpent Flag | Right Handed | Braided Beard | Siren Song |
| Charles Vane | Flintlock | Jolly Roger Banner | Right Handed | Trimmed Stubble | Giant Squid |
| Robert Culliford | Flintlock | Crowned Skull Flag | Right Handed | Bushy Beard | Screeching Parrot |
| Samuel Bellamy | Blunderbuss | Jolly Roger Banner | Right Handed | Braided Beard | Giant Squid |
| Mary Read | Flintlock | Sea Serpent Flag | Left Handed | Braided Beard | Giant Squid |
Clue 1
Rounding
The ship spyglass display only shows rounded totals. Estimate the distance to the pirate ship to decode the first clue.
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
5000
3700
1300
370
290
500
500
3000
290
2900
1100
110
1300
130
2900
110
T
5000
230
130
1300
3000
130
1300
3000
130
1300
7000
2300
1300
2900
T
5000
30
500
3000
300
Round 5,256 to the nearest thousandT
Round 30 to the nearest tenF
Round 2,569 to the nearest thousandA
Round 1,064 to the nearest hundredD
Round 2,267 to the nearest hundredP
Round 3,666 to the nearest hundredH
Round 294 to the nearest hundredG
Round 226 to the nearest tenU
Round 2,935 to the nearest hundredN
Round 6,911 to the nearest thousandR
Round 127 to the nearest tenS
Round 1,305 to the nearest hundredE
Round 369 to the nearest tenV
Round 286 to the nearest tenI
Round 537 to the nearest hundredL
Round 114 to the nearest tenO
0/16 letters found
Clue 2
Multiplication facts (1-12)
Quartermaster Pete counts equal stacks of gold coins in the ship vault. Multiply the rows to discover the next clue.
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
77
120
18
12
35
16
16
80
35
81
120
18
16
14
T
77
120
18
30
80
20
35
81
T
77
120
18
16
18
27
T
77
120
80
81
14
7 × 11 =T
3 × 6 =E
6 × 2 =V
10 × 3 =M
9 × 3 =F
7 × 2 =D
9 × 9 =N
5 × 4 =P
7 × 5 =I
2 × 8 =L
10 × 8 =A
12 × 10 =H
0/12 letters found
Clue 3
Word problems
The crew needs to calculate total rations used during the voyage. Solve the story problem to reveal the third clue.
Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.
Someonescaredthevillainoffwith .
G
66
18
114
35
61
32
17
U
18
D
There were 99 ruby rings. 33 were used up. How many ruby rings are left?G
Quartermaster found 61 doubloons yesterday and 53 more today. How many doubloons in all?A
Quartermaster found 15 brass compasses yesterday and 17 more today. How many brass compasses in all?S
There were 26 iron cannonballs. 9 were used up. How many iron cannonballs are left?Q
Quartermaster lined up 2 rows of 9 map scrolls. How many map scrolls in all?I
Quartermaster found 23 iron cannonballs yesterday and 38 more today. How many iron cannonballs in all?T
Quartermaster lined up 7 rows of 5 iron cannonballs. How many iron cannonballs in all?N
0/7 letters found
Clue 4
Fractions of a number
Only a fractional portion of the stolen treasure chest was recovered. Calculate the fraction to unlock the fourth clue.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
D
26
28
19
28
22
19
16
8
28
13
25
35
36
20
D
26
2
3
17
2
16
D
26
28
D
26
39
2
16
17
35
20
D
26
28
22
15
1/4 of 104 =D
8/10 of 10 =V
5/10 of 70 =O
5/10 of 78 =H
2/5 of 55 =C
3/6 of 34 =R
2/8 of 8 =A
1/3 of 84 =E
1/4 of 100 =F
2/8 of 76 =T
1/3 of 108 =U
2/8 of 52 =S
4/8 of 40 =N
1/10 of 160 =I
2/6 of 9 =B
1/8 of 120 =K
0/16 letters found
Clue 5
Division facts (1-12) — the last clue
Captain Redbeard wants to share the loot equally among his loyal sailors. Divide the gold pieces to unlock 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
63 ÷ 9 = ?
60 ÷ 10 = ?
72 ÷ 8 = ?
2 ÷ 1 = ?
30 ÷ 3 = ?
80 ÷ 10 = ?
30 ÷ 10 = ?
5 ÷ 1 = ?
33 ÷ 3 = ?
8 ÷ 2 = ?
48 ÷ 4 = ?
Step 2 — cross out the sentence with each answer
1.The villain blasted a loud blunderbuss, then hoisted a jolly roger banner.
2.The villain swung a sharp cutlass, then hoisted a jolly roger banner.
3.The villain fired a smoke flintlock, then displayed a crowned skull flag.
4.The villain tossed a heavy grappling hook, then displayed a crowned skull flag.
5.The villain tossed a heavy grappling hook, then raised a sea serpent flag.
6.The villain tossed a heavy grappling hook, then hoisted a jolly roger banner.
7.The villain fired a smoke flintlock, then unfurled an anchor banner.
8.The villain blasted a loud blunderbuss, then flown a golden compass flag.
9.The villain swung a sharp cutlass, then unfurled an anchor banner.
10.The villain fired a smoke flintlock, then raised a sea serpent flag.
11.The villain chopped with a boarding axe, then unfurled an anchor banner.
12.The villain blasted a loud blunderbuss, then raised a sea serpent flag.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Mystery of the Stolen Star Chart
Culprit: Calico Jack (Blunderbuss · Jolly Roger Banner · Left Handed · Braided Beard · Giant Squid)
- Clue 1 (Rounding): "THE VILLAIN DOES NOT USE A SEA SERPENT FLAG"Round 5,256 to the nearest thousand = 5000 (T) · Round 30 to the nearest ten = 30 (F) · Round 2,569 to the nearest thousand = 3000 (A) · Round 1,064 to the nearest hundred = 1100 (D) · Round 2,267 to the nearest hundred = 2300 (P) · Round 3,666 to the nearest hundred = 3700 (H) · Round 294 to the nearest hundred = 300 (G) · Round 226 to the nearest ten = 230 (U) · Round 2,935 to the nearest hundred = 2900 (N) · Round 6,911 to the nearest thousand = 7000 (R) · Round 127 to the nearest ten = 130 (S) · Round 1,305 to the nearest hundred = 1300 (E) · Round 369 to the nearest ten = 370 (V) · Round 286 to the nearest ten = 290 (I) · Round 537 to the nearest hundred = 500 (L) · Round 114 to the nearest ten = 110 (O)
- Clue 2 (Multiplication facts (1-12)): "THE VILLAIN HELD THE MAP IN THE LEFT HAND"7 × 11 = 77 (T) · 3 × 6 = 18 (E) · 6 × 2 = 12 (V) · 10 × 3 = 30 (M) · 9 × 3 = 27 (F) · 7 × 2 = 14 (D) · 9 × 9 = 81 (N) · 5 × 4 = 20 (P) · 7 × 5 = 35 (I) · 2 × 8 = 16 (L) · 10 × 8 = 80 (A) · 12 × 10 = 120 (H)
- Clue 3 (Word problems): "GIANT SQUID"There were 99 ruby rings. 33 were used up. How many ruby rings are left? = 66 (G) · Quartermaster found 61 doubloons yesterday and 53 more today. How many doubloons in all? = 114 (A) · Quartermaster found 15 brass compasses yesterday and 17 more today. How many brass compasses in all? = 32 (S) · There were 26 iron cannonballs. 9 were used up. How many iron cannonballs are left? = 17 (Q) · Quartermaster lined up 2 rows of 9 map scrolls. How many map scrolls in all? = 18 (I) · Quartermaster found 23 iron cannonballs yesterday and 38 more today. How many iron cannonballs in all? = 61 (T) · Quartermaster lined up 7 rows of 5 iron cannonballs. How many iron cannonballs in all? = 35 (N)
- Clue 4 (Fractions of a number): "DETECTIVES FOUND A BRAIDED HAIR ON DECK"1/4 of 104 = 26 (D) · 8/10 of 10 = 8 (V) · 5/10 of 70 = 35 (O) · 5/10 of 78 = 39 (H) · 2/5 of 55 = 22 (C) · 3/6 of 34 = 17 (R) · 2/8 of 8 = 2 (A) · 1/3 of 84 = 28 (E) · 1/4 of 100 = 25 (F) · 2/8 of 76 = 19 (T) · 1/3 of 108 = 36 (U) · 2/8 of 52 = 13 (S) · 4/8 of 40 = 20 (N) · 1/10 of 160 = 16 (I) · 2/6 of 9 = 3 (B) · 1/8 of 120 = 15 (K)
- Clue 5 (Division facts (1-12)): surviving statement (box 1) → Calico Jack63 ÷ 9 = 7 · 60 ÷ 10 = 6 · 72 ÷ 8 = 9 · 2 ÷ 1 = 2 · 30 ÷ 3 = 10 · 80 ÷ 10 = 8 · 30 ÷ 10 = 3 · 5 ÷ 1 = 5 · 33 ÷ 3 = 11 · 8 ÷ 2 = 4 · 48 ÷ 4 = 12
About this mystery
- Grade level
- Grade 5 math
- Math topics
- Rounding, Multiplication, Word problems, Fractions of a number, Division
- Reading level
- grades 5-6
- Theme
- The Mystery of the Stolen Star Chart — set in Blackstone Cove
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects