Math Mysteries
🏴‍☠️ PiratesGrade 4Reading: grades 3-4Place valueMultiplicationRoundingWord problemsDivision

The Golden Pineapple Caper

Ahoy! The Golden Pineapple trophy is gone from Sunny Cove. A sneaky pirate took it! Harbor Master Barnaby needs your help to find the thief 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
NameSailing StylePirate GearEyepatch SideHat ChoiceSilly Weakness
Cannonball Carlsteering the wheelparrot buddyright eye patchedtricorn hatticklish toes
Scurvy Samsteering the wheelhook handright eye patchedstriped bandanahates lime juice
Captain Hooksteering the wheelparrot buddyleft eye patchedstriped bandanaticklish toes
Henry Morgancooking the hardtackgolden spyglassright eye patchedcaptain wighates lime juice
Shiverin Sherrysteering the wheelparrot buddyright eye patchedcaptain wigticklish toes
Blackbeardfiring the cannonsgolden spyglassright eye patchedcaptain wigscared of frogs
Quartermaster Quinnscrubbing the decksilver cutlassleft eye patchedstriped bandanascared of frogs
Wave Rider Willclimbing the rigginggolden spyglassleft eye patchedstriped bandanaticklish toes
Sailor Suesteering the wheelgolden spyglassleft eye patchedstriped bandanascared of frogs
Pegleg Petesteering the wheelsilver cutlassleft eye patchedcaptain wighates lime juice
Barnacle Billscrubbing the decksilver cutlassright eye patchedcaptain wighates lime juice
Captain Kiddfiring the cannonsglowing compassright eye patchedstriped bandanaticklish toes
Captain Barnabyclimbing the rigginggolden spyglassright eye patchedcaptain wighates lime juice
Grace OMalleyclimbing the riggingparrot buddyright eye patchedcaptain wighates lime juice
Black Bartclimbing the riggingsilver cutlassleft eye patchedstriped bandanaticklish toes
Salty Sallyclimbing the rigginghook handleft eye patchedstriped bandanaticklish toes
Gunpowder Gabeclimbing the rigginghook handright eye patchedcaptain wighates lime juice
Rusty Cutlasssteering the wheelsilver cutlassright eye patchedstriped bandanaticklish toes
Calico Jackfiring the cannonshook handright eye patchedcaptain wigticklish toes
Jolly Rogerclimbing the riggingglowing compassleft eye patchedcaptain wigscared of frogs
Anne Bonnysteering the wheelhook handright eye patchedcaptain wigticklish toes
Clue 1

Place value

You find a locked chest on the beach with digit wheels. Match the place value of the gold coins to open it and find 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
500
400
8000
T
500
400
90
8000
20
4000
1000
8000
2000
60
1000
T
500
400
30
80
8000
30
3000
30
70
70
1000
T
500
50
6000
4000
4000
700
What is the value of the 5 in 1,569?T
What is the value of the 7 in 8,876?R
What is the value of the 5 in 6,957?B
What is the value of the 3 in 734?A
What is the value of the 8 in 28,667?E
What is the value of the 7 in 9,700?Y
What is the value of the 4 in 5,409?H
What is the value of the 2 in 2,364?S
What is the value of the 8 in 9,580?V
What is the value of the 3 in 93,449?P
What is the value of the 4 in 14,578?D
What is the value of the 6 in 46,010?U
What is the value of the 6 in 2,464?N
What is the value of the 9 in 296?I
What is the value of the 2 in 8,621?F
What is the value of the 1 in 31,704?O
0/16 letters found
Clue 2

Multiplication facts (1-12)

The ship cook has rows of soup cans stacked in the galley. Multiply the rows to help him count them, and he will tell you what he saw.

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
10
2
49
45
66
45
60
49
9
T
10
2
81
45
81
35
44
14
2
T
10
49
121
49
60
81
T
10
9
2
2 × 5 =T
9 × 9 =A
2 × 7 =G
6 × 11 =U
1 × 2 =H
11 × 11 =Y
11 × 4 =I
6 × 10 =P
3 × 3 =C
7 × 5 =R
7 × 7 =E
9 × 5 =S
0/12 letters found
Clue 3

Rounding

The island lookouts can only see things in rounded miles through their foggy spyglass. Round the distance of the strange ship to get their 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
20
130
2000
9000
700
7000
110
90
230
90
9000
3000
700
4300
70
50
4300
7000
700
2300
200
70
2000
5000
7000
200
1100
2000
Round 17 to the nearest tenT
Round 72 to the nearest tenM
Round 193 to the nearest hundredI
Round 93 to the nearest tenA
Round 1,075 to the nearest hundredC
Round 7,285 to the nearest thousandU
Round 1,804 to the nearest thousandE
Round 229 to the nearest tenW
Round 656 to the nearest hundredR
Round 5,012 to the nearest thousandJ
Round 4,282 to the nearest hundredO
Round 49 to the nearest tenS
Round 8,853 to the nearest thousandY
Round 133 to the nearest tenH
Round 2,281 to the nearest hundredL
Round 3,446 to the nearest thousandF
Round 109 to the nearest tenN
0/17 letters found
Clue 4

Word problems

The quartermaster is trying to count the heavy iron cannonballs in the hold. Solve his word puzzle to win the next clue.

Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.

Astrandof
C
67
69
11
29
69
52
30
20
52
G
 
hairturnedupatthescene.
Quartermaster Pete found 39 hardtack biscuits yesterday and 28 more today. How many hardtack biscuits in all?C
Quartermaster Pete found 3 gold doubloons yesterday and 66 more today. How many gold doubloons in all?A
Quartermaster Pete found 22 hardtack biscuits yesterday and 30 more today. How many hardtack biscuits in all?I
Quartermaster Pete found 15 gold doubloons yesterday and 14 more today. How many gold doubloons in all?T
Quartermaster Pete found 6 iron cannonballs yesterday and 5 more today. How many iron cannonballs in all?P
Quartermaster Pete lined up 2 rows of 10 iron cannonballs. How many iron cannonballs in all?W
Quartermaster Pete lined up 5 rows of 6 coconut treats. How many coconut treats in all?N
0/7 letters found
Clue 5

Division facts (1-12) — the last clue

The deckhands want to share their coconut treats equally so they do not fight. Divide the treats fairly, and they will share their secret.

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
110 ÷ 10 = ?
35 ÷ 5 = ?
48 ÷ 4 = ?
70 ÷ 7 = ?
48 ÷ 12 = ?
24 ÷ 8 = ?
10 ÷ 2 = ?
5 ÷ 5 = ?
22 ÷ 11 = ?
27 ÷ 3 = ?
24 ÷ 4 = ?
Step 2 — cross out the sentence with each answer
1.The villain swings from the main sail, then laughs with a loud yo ho ho.
2.The villain sneaks through the captain's cabin, then escapes with the gold pineapple.
3.The villain paddles a small rowboat, then escapes with the gold pineapple.
4.The villain climbs up the anchor chain, then sails away into the fog.
5.The villain climbs up the anchor chain, then hides the loot under some barrels.
6.The villain paddles a small rowboat, then drops a trail of fish bones.
7.The villain digs a hole in the sand, then hides the loot under some barrels.
8.The villain climbs up the anchor chain, then laughs with a loud yo ho ho.
9.The villain sneaks through the captain's cabin, then drops a trail of fish bones.
10.The villain climbs up the anchor chain, then escapes with the gold pineapple.
11.The villain sneaks through the captain's cabin, then hides the loot under some barrels.
12.The villain sneaks through the captain's cabin, then sails away into the fog.
Solve it

Name the culprit

Choose the one suspect left standing.

About this mystery

Grade level
Grade 4 math
Math topics
Place value, Multiplication, Rounding, Word problems, Division
Reading level
grades 3-4
Theme
The Golden Pineapple Caper — set in Sunny Cove archipelago
Format
Interactive online & printable worksheet with answer key
Solution
One unique, verified culprit among 21 suspects

More free printable math mysteries

4th grade worksheetsMultiplication worksheetsDivision worksheetsRounding worksheetsPlace value worksheets🏴‍☠️ Pirates worksheetsAll worksheets →
The Mystery of the Golden Pineapple
Grade 4
The Secret of Whisper Island
Grade 4
The Great Barkington Trophy Mystery
Grade 4
The Mystery of the Missing Medals
Grade 4