🏴☠️ PiratesGrade 2Reading: grades 1-2Place valueAdditionSkip countingSubtractionMissing addends
The Mystery of Barnacle Bay
A sneaky pirate has taken Captain Barnaby's golden compass! We must track them down before they sail away into the misty seas.
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 | Sword Style | Pirate Gear | Hand Use | Bandana | Silly Fear |
|---|---|---|---|---|---|
| Scurvy Dog | Cutlass Spin | Golden Spyglass | Left Handed | Red Bandana | Scared of Crabs |
| Salty Sally | Cutlass Spin | Peg Leg | Left Handed | Red Bandana | Scared of Frogs |
| Calico Jack | Cutlass Spin | Golden Spyglass | Left Handed | Green Bandana | Scared of Frogs |
| Barnacle Bill | Cutlass Spin | Peg Leg | Left Handed | Green Bandana | Scared of Frogs |
| Cutlass Kate | Dagger Toss | Feather Hat | Right Handed | Blue Bandana | Scared of Crabs |
| Captain Kidd | Double Blade | Shiny Hook | Right Handed | Green Bandana | Scared of Crabs |
| Red Beard | Saber Slash | Feather Hat | Left Handed | Green Bandana | Scared of Frogs |
| Anne Bonny | Hook Jab | Golden Spyglass | Left Handed | Green Bandana | Scared of Parrots |
| Bilge Rat Bill | Double Blade | Golden Spyglass | Left Handed | Blue Bandana | Scared of Frogs |
| Captain Hook | Cutlass Spin | Magic Compass | Left Handed | Blue Bandana | Scared of Parrots |
| Gullwing Gary | Dagger Toss | Magic Compass | Left Handed | Red Bandana | Scared of Frogs |
| Captain Flint | Cutlass Spin | Magic Compass | Right Handed | Green Bandana | Scared of Frogs |
| Sir Francis | Saber Slash | Feather Hat | Left Handed | Blue Bandana | Scared of Crabs |
| Long John | Hook Jab | Feather Hat | Left Handed | Green Bandana | Scared of Frogs |
| Blackbeard | Hook Jab | Golden Spyglass | Left Handed | Green Bandana | Scared of Crabs |
| Scurvy Sam | Saber Slash | Feather Hat | Right Handed | Red Bandana | Scared of Frogs |
| One Eyed Willy | Dagger Toss | Peg Leg | Right Handed | Green Bandana | Scared of Frogs |
| Henry Morgan | Cutlass Spin | Shiny Hook | Right Handed | Green Bandana | Scared of Parrots |
| Patchy Pete | Saber Slash | Shiny Hook | Left Handed | Green Bandana | Scared of Parrots |
| Jolly Roger | Double Blade | Shiny Hook | Left Handed | Green Bandana | Scared of Frogs |
| Barnaby Blue | Dagger Toss | Golden Spyglass | Left Handed | Green Bandana | Scared of Parrots |
Clue 1
Place value
We look at the ship logs. The numbers are written in tens and ones. Let us find the real value of the gold.
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
35
57
92
91
71
64
42
T
35
92
25
81
92
23
19
81
T
35
57
42
18
92
42
23
57
71
19
51
57
81
81
24
What number has 3 tens and 5 ones?T
What number has 7 tens and 1 one?I
What number has 2 tens and 4 ones?K
What number has 9 tens and 1 one?P
What number has 2 tens and 3 ones?S
What number has 9 tens and 2 ones?E
What number has 8 tens and 1 one?O
What number has 1 ten and 9 ones?N
What number has 5 tens and 1 one?Y
What number has 5 tens and 7 ones?H
What number has 4 tens and 2 ones?A
What number has 2 tens and 5 ones?D
What number has 6 tens and 4 ones?R
What number has 1 ten and 8 ones?V
0/14 letters found
Clue 2
Addition
The deckhand adds up the heavy crates of food. We must put the two piles together 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.
T
83
79
58
60
81
53
48
53
85
59
32
86
81
59
72
38
48
59
21
38
72
53
T
83
79
T
83
79
58
32
58
34
T
83
79
59
85
86
40 + 43 =T
14 + 34 =M
25 + 33 =E
28 + 51 =H
27 + 58 =N
22 + 10 =L
24 + 36 =C
10 + 24 =F
12 + 9 =P
33 + 26 =A
58 + 28 =D
11 + 27 =S
37 + 16 =I
51 + 21 =W
24 + 57 =R
0/15 letters found
Clue 3
Skip counting
We follow the wet footprints on the deck. They jump by twos all the way from the cabin to the big sail.
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
42
30
33
14
70
90
40
33
20
33
21
25
16
21
60
21
55
50
14
70
8
90
14
33
33
36
130
14
70
21
10
55
50
14
70
90
16
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, ___, 45, 48T
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39E
Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12M
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, ___, 35, 40H
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, ___, 39, 42N
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110G
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, ___, 80, 90O
Skip-count by 5s. Fill the blank: 5, 10, 15, ___, 25, 30L
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, ___, 16, 18R
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, ___, 30, 35P
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, ___, 65, 70W
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14K
Skip-count by 10s. Fill the blank: 10, 20, 30, ___, 50, 60U
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, ___, 24, 27A
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65Y
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, ___, 60, 70F
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20S
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, ___, 140, 150C
0/18 letters found
Clue 4
Subtraction
The crew drops some heavy lead weights into the dark water. We subtract what we lost to find what is left.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
S
40
29
46
74
57
29
50
46
48
74
25
S
40
89
88
45
46
48
48
30
88
74
11
46
32
59
47
48
46
48
83
48
88
29
11
48
50
32
30
25
54 - 14 =S
84 - 34 =H
103 - 14 =O
66 - 9 =Y
44 - 33 =B
89 - 15 =A
71 - 25 =R
94 - 11 =L
69 - 22 =W
73 - 14 =C
86 - 38 =E
115 - 27 =F
85 - 40 =G
49 - 24 =D
56 - 26 =N
69 - 37 =I
38 - 9 =T
0/17 letters found
Clue 5
Missing addends — the last clue
We had twelve shiny gold coins but now some are gone. We must find how many are missing from our chest.
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
7 + ___ = 19
7 + ___ = 9
1 + ___ = 12
1 + ___ = 6
8 + ___ = 18
10 + ___ = 13
10 + ___ = 18
3 + ___ = 10
2 + ___ = 11
6 + ___ = 10
9 + ___ = 15
Step 2 — cross out the sentence with each answer
1.The villain swings with a hook jab, then tips a feather hat.
2.The villain strikes with a saber slash, then tips a feather hat.
3.The villain swings with a hook jab, then waves a shiny hook.
4.The villain strikes with a saber slash, then peers through a golden spyglass.
5.The villain swings with a hook jab, then clomps on a peg leg.
6.The villain throws with a dagger toss, then peers through a golden spyglass.
7.The villain strikes with a saber slash, then clomps on a peg leg.
8.The villain fights with a double blade, then checks a magic compass.
9.The villain fights with a double blade, then clomps on a peg leg.
10.The villain fights with a double blade, then peers through a golden spyglass.
11.The villain spins with a cutlass spin, then peers through a golden spyglass.
12.The villain spins with a cutlass spin, then clomps on a peg leg.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Mystery of Barnacle Bay
Culprit: Long John (Hook Jab · Feather Hat · Left Handed · Green Bandana · Scared of Frogs)
- Clue 1 (Place value): "THE PIRATE DOES NOT HAVE A SHINY HOOK"What number has 3 tens and 5 ones? = 35 (T) · What number has 7 tens and 1 one? = 71 (I) · What number has 2 tens and 4 ones? = 24 (K) · What number has 9 tens and 1 one? = 91 (P) · What number has 2 tens and 3 ones? = 23 (S) · What number has 9 tens and 2 ones? = 92 (E) · What number has 8 tens and 1 one? = 81 (O) · What number has 1 ten and 9 ones? = 19 (N) · What number has 5 tens and 1 one? = 51 (Y) · What number has 5 tens and 7 ones? = 57 (H) · What number has 4 tens and 2 ones? = 42 (A) · What number has 2 tens and 5 ones? = 25 (D) · What number has 6 tens and 4 ones? = 64 (R) · What number has 1 ten and 8 ones? = 18 (V)
- Clue 2 (Addition): "THE CRIMINAL DRAWS MAPS WITH THE LEFT HAND"40 + 43 = 83 (T) · 14 + 34 = 48 (M) · 25 + 33 = 58 (E) · 28 + 51 = 79 (H) · 27 + 58 = 85 (N) · 22 + 10 = 32 (L) · 24 + 36 = 60 (C) · 10 + 24 = 34 (F) · 12 + 9 = 21 (P) · 33 + 26 = 59 (A) · 58 + 28 = 86 (D) · 11 + 27 = 38 (S) · 37 + 16 = 53 (I) · 51 + 21 = 72 (W) · 24 + 57 = 81 (R)
- Clue 3 (Skip counting): "THE ROGUE LEAPS AWAY FROM GREEN CROAKY FROGS"Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, ___, 45, 48 = 42 (T) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39 = 33 (E) · Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12 = 8 (M) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, ___, 35, 40 = 30 (H) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, ___, 39, 42 = 36 (N) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110 = 90 (G) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, ___, 80, 90 = 70 (O) · Skip-count by 5s. Fill the blank: 5, 10, 15, ___, 25, 30 = 20 (L) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, ___, 16, 18 = 14 (R) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, ___, 30, 35 = 25 (P) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, ___, 65, 70 = 60 (W) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14 = 10 (K) · Skip-count by 10s. Fill the blank: 10, 20, 30, ___, 50, 60 = 40 (U) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, ___, 24, 27 = 21 (A) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65 = 55 (Y) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, ___, 60, 70 = 50 (F) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20 = 16 (S) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, ___, 140, 150 = 130 (C)
- Clue 4 (Subtraction): "STRAY THREADS OF GREEN FABRIC WERE LEFT BEHIND"54 - 14 = 40 (S) · 84 - 34 = 50 (H) · 103 - 14 = 89 (O) · 66 - 9 = 57 (Y) · 44 - 33 = 11 (B) · 89 - 15 = 74 (A) · 71 - 25 = 46 (R) · 94 - 11 = 83 (L) · 69 - 22 = 47 (W) · 73 - 14 = 59 (C) · 86 - 38 = 48 (E) · 115 - 27 = 88 (F) · 85 - 40 = 45 (G) · 49 - 24 = 25 (D) · 56 - 26 = 30 (N) · 69 - 37 = 32 (I) · 38 - 9 = 29 (T)
- Clue 5 (Missing addends): surviving statement (box 1) → Long John7 + ___ = 19 = 12 · 7 + ___ = 9 = 2 · 1 + ___ = 12 = 11 · 1 + ___ = 6 = 5 · 8 + ___ = 18 = 10 · 10 + ___ = 13 = 3 · 10 + ___ = 18 = 8 · 3 + ___ = 10 = 7 · 2 + ___ = 11 = 9 · 6 + ___ = 10 = 4 · 9 + ___ = 15 = 6
About this mystery
- Grade level
- Grade 2 math
- Math topics
- Place value, Addition, Skip counting, Subtraction, Missing addends
- Reading level
- grades 1-2
- Theme
- The Mystery of Barnacle Bay — set in Barnacle Bay
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects