🔎 PirtaesGrade 1Reading: grades 1-2AdditionSubtractionSkip countingPlace valueMissing addends
The Mystery of the Black Cove Treasure
Oh no! A sneaky pirate stole the Captain's favorite golden compass from the ship cabin! We must search Scurvy Sandbar, solve the clues, and find the thief.
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 | Main Skill | Pirate Gear | Writing Hand | Bandanna Color | Pirate Fear |
|---|---|---|---|---|---|
| Blackbeard | Ship Cook | Shiny Cutlass | Writes Right Handed | Red Bandanna | Hates Seaweed |
| Sailor Sue | Map Reader | Iron Hook | Writes Left Handed | Black Bandanna | Scared of Sharks |
| Barnaby Blue | Map Reader | Iron Hook | Writes Right Handed | Black Bandanna | Sneezes at Pepper |
| Captain Charles | Sails Clinger | Brass Spyglass | Writes Right Handed | Black Bandanna | Scared of Sharks |
| Salty Sam | Ship Cook | Green Parrot | Writes Right Handed | Red Bandanna | Hates Seaweed |
| Patchy Pete | Cannon Loader | Wooden Leg | Writes Right Handed | Black Bandanna | Sneezes at Pepper |
| Calico Jack | Deck Scrubber | Iron Hook | Writes Right Handed | Red Bandanna | Hates Seaweed |
| Anne Bonny | Cannon Loader | Wooden Leg | Writes Right Handed | Red Bandanna | Hates Seaweed |
| Captain Flint | Deck Scrubber | Wooden Leg | Writes Left Handed | Red Bandanna | Hates Seaweed |
| Ben Gunn | Cannon Loader | Shiny Cutlass | Writes Left Handed | Blue Bandanna | Scared of Sharks |
| Grace O Malley | Sails Clinger | Shiny Cutlass | Writes Right Handed | Blue Bandanna | Hates Seaweed |
| Mr Smee | Sails Clinger | Shiny Cutlass | Writes Right Handed | Black Bandanna | Hates Seaweed |
| Black Dog | Map Reader | Shiny Cutlass | Writes Left Handed | Blue Bandanna | Sneezes at Pepper |
| Pegleg Pete | Cannon Loader | Wooden Leg | Writes Right Handed | Red Bandanna | Sneezes at Pepper |
| Captain Kidd | Sails Clinger | Green Parrot | Writes Left Handed | Blue Bandanna | Hates Seaweed |
| Cutlass Kate | Sails Clinger | Green Parrot | Writes Right Handed | Red Bandanna | Sneezes at Pepper |
| Red Beard | Map Reader | Iron Hook | Writes Left Handed | Red Bandanna | Scared of Sharks |
| Billy Bones | Map Reader | Wooden Leg | Writes Right Handed | Red Bandanna | Hates Seaweed |
| Jolly Jean | Cannon Loader | Shiny Cutlass | Writes Left Handed | Red Bandanna | Hates Seaweed |
| Captain Hook | Ship Cook | Green Parrot | Writes Right Handed | Blue Bandanna | Sneezes at Pepper |
| Jolly Roger | Sails Clinger | Green Parrot | Writes Left Handed | Black Bandanna | Sneezes at Pepper |
Clue 1
Addition
We need to count all the coconut cups in the kitchen to 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
4
9
10
14
6
15
15
19
6
20
18
7
10
3
20
7
T
4
9
19
14
10
19
17
2
10
10
20
8
19
2
2
7
T
4
3 + 1 =T
1 + 1 =R
6 + 2 =P
7 + 3 =E
7 + 2 =H
6 + 11 =G
9 + 9 =D
11 + 9 =N
3 + 3 =I
4 + 3 =O
14 + 5 =A
2 + 1 =S
4 + 11 =L
4 + 10 =V
0/14 letters found
Clue 2
Subtraction
The pirate dropped some shiny pearls on the deck. Let us see how many are 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.
T
15
12
7
13
3
7
18
5
9
T
15
12
1
7
4
16
8
1
T
15
7
13
16
1
T
15
12
T
15
12
7
8
1
6
12
T
15
12
18
3
11
17 - 2 =T
7 - 2 =K
20 - 9 =D
5 - 2 =N
3 - 2 =I
19 - 7 =H
10 - 2 =R
20 - 2 =A
20 - 7 =S
9 - 3 =G
12 - 8 =F
11 - 2 =Y
10 - 3 =E
18 - 2 =W
0/14 letters found
Clue 3
Skip counting
We must count the pirate boots by twos to see who walked down the path.
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
36
39
28
18
50
28
8
20
55
T
36
39
45
28
35
16
28
35
30
18
28
24
T
36
70
18
T
36
28
12
45
50
18
28
8
100
28
28
24
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, ___, 39, 42T
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, ___, 14, 16P
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, ___, 110, 120W
Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12A
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65Y
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, ___, 55, 60N
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55I
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, ___, 40, 45F
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, ___, 20, 22S
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, ___, 42, 45H
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, ___, 26, 28D
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, ___, 22, 24K
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, ___, 30, 32E
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20R
Skip-count by 10s. Fill the blank: 10, 20, ___, 40, 50U
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, ___, 75, 80O
0/16 letters found
Clue 4
Place value
The locked chest needs ten-packs of crackers and single crackers to open it.
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
89
64
49
34
68
62
56
49
30
75
64
A
89
79
75
A
89
79
79
A
89
78
A
89
42
60
30
93
56
34
79
56
62
30
42
A
89
79
75
What number has 8 tens and 9 ones?A
What number has 9 tens and 3 ones?F
What number has 7 tens and 9 ones?N
What number has 6 tens and 2 ones?H
What number has 7 tens and 5 ones?D
What number has 6 tens and 0 ones?L
What number has 4 tens and 2 ones?S
What number has 3 tens and 0 ones?E
What number has 7 tens and 8 ones?W
What number has 4 tens and 9 ones?R
What number has 5 tens and 6 ones?T
What number has 6 tens and 8 ones?G
What number has 3 tens and 4 ones?I
What number has 6 tens and 4 ones?B
0/14 letters found
Clue 5
Missing addends — the last clue
We have five map pieces but we need eight. How many more must we find?
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
9 + ___ = 13
5 + ___ = 11
5 + ___ = 6
3 + ___ = 14
4 + ___ = 12
4 + ___ = 11
9 + ___ = 18
3 + ___ = 8
3 + ___ = 15
3 + ___ = 13
10 + ___ = 12
Step 2 — cross out the sentence with each answer
1.The villain takes the captain's compass, then swings away on a long rope.
2.The villain steals the gold doubloons, then escapes in a wooden rowboat.
3.The villain hides the treasure map, then swings away on a long rope.
4.The villain grabs the golden key, then runs across the sandy beach.
5.The villain grabs the golden key, then escapes in a wooden rowboat.
6.The villain swipes the diamond ring, then swims to the secret cave.
7.The villain takes the captain's compass, then escapes in a wooden rowboat.
8.The villain takes the captain's compass, then sails away on a fast sloop.
9.The villain takes the captain's compass, then runs across the sandy beach.
10.The villain swipes the diamond ring, then escapes in a wooden rowboat.
11.The villain grabs the golden key, then sails away on a fast sloop.
12.The villain steals the gold doubloons, then runs across the sandy beach.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Mystery of the Black Cove Treasure
Culprit: Anne Bonny (Cannon Loader · Wooden Leg · Writes Right Handed · Red Bandanna · Hates Seaweed)
- Clue 1 (Addition): "THE VILLAIN DOES NOT HAVE A GREEN PARROT"3 + 1 = 4 (T) · 1 + 1 = 2 (R) · 6 + 2 = 8 (P) · 7 + 3 = 10 (E) · 7 + 2 = 9 (H) · 6 + 11 = 17 (G) · 9 + 9 = 18 (D) · 11 + 9 = 20 (N) · 3 + 3 = 6 (I) · 4 + 3 = 7 (O) · 14 + 5 = 19 (A) · 2 + 1 = 3 (S) · 4 + 11 = 15 (L) · 4 + 10 = 14 (V)
- Clue 2 (Subtraction): "THE SNEAKY THIEF WRITES WITH THE RIGHT HAND"17 - 2 = 15 (T) · 7 - 2 = 5 (K) · 20 - 9 = 11 (D) · 5 - 2 = 3 (N) · 3 - 2 = 1 (I) · 19 - 7 = 12 (H) · 10 - 2 = 8 (R) · 20 - 2 = 18 (A) · 20 - 7 = 13 (S) · 9 - 3 = 6 (G) · 12 - 8 = 4 (F) · 11 - 2 = 9 (Y) · 10 - 3 = 7 (E) · 18 - 2 = 16 (W)
- Clue 3 (Skip counting): "THE SNEAKY THIEF REFUSED TO STEP IN SEAWEED"Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, ___, 39, 42 = 36 (T) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, ___, 14, 16 = 12 (P) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, ___, 110, 120 = 100 (W) · Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12 = 8 (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 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, ___, 55, 60 = 50 (N) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55 = 45 (I) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, ___, 40, 45 = 35 (F) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, ___, 20, 22 = 18 (S) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, ___, 42, 45 = 39 (H) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, ___, 26, 28 = 24 (D) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, ___, 22, 24 = 20 (K) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, ___, 30, 32 = 28 (E) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20 = 16 (R) · Skip-count by 10s. Fill the blank: 10, 20, ___, 40, 50 = 30 (U) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, ___, 75, 80 = 70 (O)
- Clue 4 (Place value): "A BRIGHT RED BANDANNA WAS LEFT IN THE SAND"What number has 8 tens and 9 ones? = 89 (A) · What number has 9 tens and 3 ones? = 93 (F) · What number has 7 tens and 9 ones? = 79 (N) · What number has 6 tens and 2 ones? = 62 (H) · What number has 7 tens and 5 ones? = 75 (D) · What number has 6 tens and 0 ones? = 60 (L) · What number has 4 tens and 2 ones? = 42 (S) · What number has 3 tens and 0 ones? = 30 (E) · What number has 7 tens and 8 ones? = 78 (W) · What number has 4 tens and 9 ones? = 49 (R) · What number has 5 tens and 6 ones? = 56 (T) · What number has 6 tens and 8 ones? = 68 (G) · What number has 3 tens and 4 ones? = 34 (I) · What number has 6 tens and 4 ones? = 64 (B)
- Clue 5 (Missing addends): surviving statement (box 3) → Anne Bonny9 + ___ = 13 = 4 · 5 + ___ = 11 = 6 · 5 + ___ = 6 = 1 · 3 + ___ = 14 = 11 · 4 + ___ = 12 = 8 · 4 + ___ = 11 = 7 · 9 + ___ = 18 = 9 · 3 + ___ = 8 = 5 · 3 + ___ = 15 = 12 · 3 + ___ = 13 = 10 · 10 + ___ = 12 = 2
About this mystery
- Grade level
- Grade 1 math
- Math topics
- Addition, Subtraction, Skip counting, Place value, Missing addends
- Reading level
- grades 1-2
- Theme
- The Mystery of the Black Cove Treasure — set in Scurvy Sandbar
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects