Math Mysteries
🏴‍☠️ PiratesGrade 3Reading: grades 3-4AdditionSubtractionRoundingMultiplicationDivision

The Mystery of the Lost Golden Anchor

The legendary Golden Anchor has been stolen from the flagship dock! Quartermaster Barnaby was locked in the brig while the thief ran off with the heavy treasure. We must search the sandy beaches and pirate ships to track down the sneaky crew member who took it.

Suspects

Possible suspects

Cross off a row as each clue rules it out. On screen, tap a row.

21 of 21 still in play
Nameship skillcarried itemwriting handpirate hatgreatest fear
Henry Morganspots a far island from the masta wooden compasswrites with left handa red bandanagets seasick easily
Siren Sarahsteers the heavy pirate shipa pet parrotwrites with left handa red bandanascared of sharks
Scurvy Danfires the giant brass cannona golden spyglasswrites with left handa black captain hatgets seasick easily
Captain Kiddfires the giant brass cannona silver cutlasswrites with right handa red bandanagets seasick easily
Salty Samswings on the long rigging ropesa silver cutlasswrites with left handa black captain hatallergic to sea salt
Redbeardsteers the heavy pirate shipa pet parrotwrites with left handa black captain hatallergic to sea salt
Captain Flintsteers the heavy pirate shipa pet parrotwrites with left handa red bandanaallergic to sea salt
Stede Bonnetsteers the heavy pirate shipa heavy iron keywrites with left handa blue tricornallergic to sea salt
Billy Bonesfires the giant brass cannona heavy iron keywrites with left handa red bandanaallergic to sea salt
Boatswain Bobfires the giant brass cannona golden spyglasswrites with left handa black captain hatallergic to sea salt
Patchy Peteswings on the long rigging ropesa heavy iron keywrites with right handa red bandanaallergic to sea salt
Barnaby Bluespots a far island from the masta heavy iron keywrites with left handa red bandanaallergic to sea salt
Edward Lowspots a far island from the masta silver cutlasswrites with left handa red bandanagets seasick easily
Charles Vanedecodes the ancient sea mapa wooden compasswrites with left handa red bandanaallergic to sea salt
Grace OMalleydecodes the ancient sea mapa pet parrotwrites with left handa red bandanaallergic to sea salt
Calico Jackswings on the long rigging ropesa wooden compasswrites with right handa red bandanagets seasick easily
Blackbeardfires the giant brass cannona pet parrotwrites with right handa red bandanaallergic to sea salt
Mary Readswings on the long rigging ropesa wooden compasswrites with left handa blue tricornscared of sharks
Marina Mayswings on the long rigging ropesa golden spyglasswrites with left handa black captain hatgets seasick easily
Captain Hookdecodes the ancient sea mapa golden spyglasswrites with left handa black captain hatgets seasick easily
Pegleg Petedecodes the ancient sea mapa heavy iron keywrites with right handa red bandanaallergic to sea salt
Clue 1

Addition

To get the first clue, we need to add up all the shiny gold coins found in the pirate chests.

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
985
511
979
757
628
664
664
558
628
381
239
519
979
258
381
519
T
985
511
558
757
979
558
362
519
519
239
979
381
316
519
320
438
558
258
258
661 + 324 =T
341 + 170 =H
149 + 90 =D
189 + 173 =W
413 + 251 =L
144 + 237 =N
460 + 297 =V
225 + 294 =O
78 + 180 =S
209 + 107 =C
308 + 320 =I
180 + 140 =M
335 + 223 =A
160 + 278 =P
439 + 540 =E
0/15 letters found
Clue 2

Subtraction

To find the next clue, we must take away the rotten wooden planks that fell off the ship deck.

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
892
749
440
403
584
580
584
T
892
661
794
756
794
661
T
892
440
756
584
T
892
749
T
892
749
440
556
440
777
T
892
749
472
761
235
926 - 34 =T
723 - 143 =S
939 - 145 =R
821 - 265 =L
1070 - 321 =H
909 - 148 =N
694 - 33 =O
1043 - 287 =W
852 - 75 =F
700 - 297 =V
947 - 363 =I
608 - 136 =A
745 - 305 =E
483 - 248 =D
0/14 letters found
Clue 3

Rounding

We found a blurry map with fuzzy numbers. Round the distance to the nearest ten to see where to dig next.

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
3000
6000
90
T
3000
700
800
200
90
T
3000
80
300
90
90
600
90
5000
40
800
70
8000
T
3000
6000
90
80
700
7000
T
3000
9000
700
4000
800
Round 3,130 to the nearest thousandT
Round 92 to the nearest tenE
Round 8,607 to the nearest thousandY
Round 186 to the nearest hundredG
Round 827 to the nearest hundredR
Round 270 to the nearest hundredN
Round 668 to the nearest hundredA
Round 72 to the nearest tenO
Round 5,930 to the nearest thousandH
Round 622 to the nearest hundredZ
Round 40 to the nearest tenF
Round 6,772 to the nearest thousandL
Round 4,595 to the nearest thousandD
Round 4,274 to the nearest thousandI
Round 8,046 to the nearest thousandM
Round 82 to the nearest tenS
0/16 letters found
Clue 4

Multiplication facts (1-12)

The pirate crew stacked their barrels in equal rows. Let us multiply the rows to find the hidden code.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

R
3
90
4
14
22
20
42
44
42
44
R
3
90
80
4
25
15
90
R
3
90
22
90
21
42
20
55
42
44
90
44
20
20
70
3 × 1 =R
4 × 1 =D
10 × 8 =A
7 × 2 =C
5 × 3 =W
10 × 9 =E
5 × 5 =S
11 × 2 =L
5 × 11 =N
6 × 7 =T
11 × 4 =H
10 × 7 =K
10 × 2 =O
3 × 7 =F
0/14 letters found
Clue 5

Division facts (1-12) — the last clue

The pirates need to share their coconuts equally among the crew. Divide the food to unlock the final box.

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
11 ÷ 1 = ?
6 ÷ 1 = ?
70 ÷ 10 = ?
5 ÷ 1 = ?
22 ÷ 11 = ?
36 ÷ 3 = ?
20 ÷ 2 = ?
54 ÷ 6 = ?
3 ÷ 3 = ?
12 ÷ 3 = ?
33 ÷ 11 = ?
Step 2 — cross out the sentence with each answer
1.The villain decodes the ancient sea map, then polishes a silver cutlass.
2.The villain steers the heavy pirate ship, then peers through a golden spyglass.
3.The villain spots a far island from the mast, then peers through a golden spyglass.
4.The villain swings on the long rigging ropes, then turns a heavy iron key.
5.The villain spots a far island from the mast, then polishes a silver cutlass.
6.The villain fires the giant brass cannon, then turns a heavy iron key.
7.The villain decodes the ancient sea map, then feeds a colorful pet parrot.
8.The villain steers the heavy pirate ship, then feeds a colorful pet parrot.
9.The villain steers the heavy pirate ship, then turns a heavy iron key.
10.The villain decodes the ancient sea map, then turns a heavy iron key.
11.The villain spots a far island from the mast, then turns a heavy iron key.
12.The villain decodes the ancient sea map, then peers through a golden spyglass.
Solve it

Name the culprit

Choose the one suspect left standing.

About this mystery

Grade level
Grade 3 math
Math topics
Addition, Subtraction, Rounding, Multiplication, Division
Reading level
grades 3-4
Theme
The Mystery of the Lost Golden Anchor — set in Salty Shark Bay
Format
Interactive online & printable worksheet with answer key
Solution
One unique, verified culprit among 21 suspects

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