Grade 1Reading: grades 1-2AdditionSubtractionSkip countingPlace valueMissing addends
The Case of the Golden Pineapple
Oh no! Someone took Chef Barnaby's famous Golden Pineapple from the beach kitchen! We need to find the sneaky pirate who did it. Look for clues around Coconut Cove!
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 | Pirate Tool | Pet Friend | Saber Grip | Bandana Color | Favorite Snack |
|---|---|---|---|---|---|
| Boots | wooden shovel | parrot | left handed | blue bandana | coconut drops |
| Finley | gold hook | iguana | left handed | red bandana | coconut drops |
| Coby | wooden shovel | parrot | right handed | red bandana | coconut drops |
| Captain Kid | map compass | crab | left handed | blue bandana | coconut drops |
| Captain Jack | map compass | seagull | right handed | green bandana | sweet mango |
| Sandy | rope lasso | crab | right handed | blue bandana | sweet mango |
| River | gold hook | monkey | right handed | red bandana | salty crackers |
| Scurvy Sam | rope lasso | crab | left handed | green bandana | sweet mango |
| Skye | spyglass | iguana | left handed | red bandana | salty crackers |
| Mallow | map compass | crab | left handed | red bandana | coconut drops |
| Sunny | rope lasso | iguana | left handed | blue bandana | coconut drops |
| Patch | spyglass | parrot | left handed | red bandana | coconut drops |
| Salty Sue | spyglass | seagull | left handed | red bandana | coconut drops |
| Toby | rope lasso | crab | right handed | red bandana | salty crackers |
| Pegleg Pete | rope lasso | crab | left handed | green bandana | salty crackers |
| Scout | gold hook | seagull | right handed | blue bandana | salty crackers |
| Barnaby | spyglass | parrot | left handed | red bandana | salty crackers |
| Gale | rope lasso | iguana | left handed | green bandana | salty crackers |
| Breezy | gold hook | iguana | right handed | red bandana | sweet mango |
| Pip | map compass | seagull | left handed | red bandana | coconut drops |
| Penny | map compass | monkey | right handed | green bandana | coconut drops |
Clue 1
Addition
We count the pirate hats on the ship. We add the blue hats and the red hats to get a total.
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
19
5
17
4
14
17
16
18
15
10
12
3
16
T
19
17
20
6
17
4
14
6
T
19
5
16
9
17
16
14
12
2
8
16
14
16
8 + 11 =T
5 + 4 =V
4 + 11 =Y
11 + 5 =A
3 + 1 =S
2 + 1 =R
8 + 6 =N
7 + 3 =P
5 + 12 =E
8 + 10 =K
4 + 8 =I
4 + 1 =H
12 + 8 =D
1 + 1 =G
4 + 4 =U
2 + 4 =O
0/16 letters found
Clue 2
Subtraction
We find a box of sweet snacks. Some snacks are gone. We subtract to find 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
4
12
14
9
7
14
2
13
8
3
5
16
2
T
4
14
5
9
1
14
11
T
4
12
2
7
6
14
6
10 - 6 =T
20 - 6 =E
12 - 7 =I
15 - 4 =F
16 - 8 =Y
20 - 4 =R
4 - 1 =P
13 - 1 =H
14 - 8 =D
15 - 8 =N
9 - 8 =L
16 - 3 =K
10 - 8 =A
17 - 8 =S
0/14 letters found
Clue 3
Skip counting
We follow footprints along the wet beach. We count them by twos to see how far they go.
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
40
12
26
45
6
15
110
T
40
26
22
110
9
9
20
T
40
15
26
120
6
120
T
40
22
20
22
20
9
50
T
40
33
15
20
45
120
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, ___, 45, 50T
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, ___, 28, 30E
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55P
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130A
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, ___, 130, 140S
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, ___, 60, 70U
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39D
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, ___, 14, 16H
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, ___, 24, 26C
Skip-count by 2s. Fill the blank: 2, 4, ___, 8, 10I
Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15N
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, ___, 22, 24O
Skip-count by 5s. Fill the blank: 5, 10, ___, 20, 25R
0/13 letters found
Clue 4
Place value
We open a treasure chest. The gold coins are grouped in tens and ones to show the total.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
W
18
85
50
96
93
11
26
99
58
16
91
11
26
99
96
50
91
16
85
26
39
91
11
26
91
11
91
What number has 1 ten and 8 ones?W
What number has 5 tens and 0 ones?F
What number has 9 tens and 9 ones?S
What number has 3 tens and 9 ones?B
What number has 8 tens and 5 ones?E
What number has 1 ten and 6 ones?R
What number has 2 tens and 6 ones?D
What number has 9 tens and 6 ones?O
What number has 9 tens and 1 one?A
What number has 1 ten and 1 one?N
What number has 9 tens and 3 ones?U
What number has 5 tens and 8 ones?T
0/12 letters found
Clue 5
Missing addends — the last clue
We need ten map pieces. We have six. We find the missing number to complete our map!
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
8 + ___ = 12
8 + ___ = 18
6 + ___ = 15
5 + ___ = 17
5 + ___ = 13
3 + ___ = 6
4 + ___ = 11
4 + ___ = 9
3 + ___ = 14
5 + ___ = 7
8 + ___ = 14
Step 2 — cross out the sentence with each answer
1.The villain points a shiny compass, then feeds a tiny crab.
2.The villain digs a hole in the sand, then gives a banana to a monkey.
3.The villain points a shiny compass, then gives a banana to a monkey.
4.The villain points a shiny compass, then tosses fish to a seagull.
5.The villain throws a long rope lasso, then tosses fish to a seagull.
6.The villain points a shiny compass, then pets a green iguana.
7.The villain waves a shiny gold hook, then pets a green iguana.
8.The villain digs a hole in the sand, then tosses fish to a seagull.
9.The villain looks through a spyglass, then calls a green parrot.
10.The villain looks through a spyglass, then tosses fish to a seagull.
11.The villain digs a hole in the sand, then calls a green parrot.
12.The villain looks through a spyglass, then feeds a tiny crab.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Case of the Golden Pineapple
Culprit: Mallow (map compass · crab · left handed · red bandana · coconut drops)
- Clue 1 (Addition): "THE SNEAKY PIRATE DOES NOT HAVE AN IGUANA"8 + 11 = 19 (T) · 5 + 4 = 9 (V) · 4 + 11 = 15 (Y) · 11 + 5 = 16 (A) · 3 + 1 = 4 (S) · 2 + 1 = 3 (R) · 8 + 6 = 14 (N) · 7 + 3 = 10 (P) · 5 + 12 = 17 (E) · 8 + 10 = 18 (K) · 4 + 8 = 12 (I) · 4 + 1 = 5 (H) · 12 + 8 = 20 (D) · 1 + 1 = 2 (G) · 4 + 4 = 8 (U) · 2 + 4 = 6 (O)
- Clue 2 (Subtraction): "THE SNEAKY PIRATE IS LEFT HANDED"10 - 6 = 4 (T) · 20 - 6 = 14 (E) · 12 - 7 = 5 (I) · 15 - 4 = 11 (F) · 16 - 8 = 8 (Y) · 20 - 4 = 16 (R) · 4 - 1 = 3 (P) · 13 - 1 = 12 (H) · 14 - 8 = 6 (D) · 15 - 8 = 7 (N) · 9 - 8 = 1 (L) · 16 - 3 = 13 (K) · 10 - 8 = 2 (A) · 17 - 8 = 9 (S)
- Clue 3 (Skip counting): "THE PIRATE CANNOT RESIST COCONUT DROPS"Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, ___, 45, 50 = 40 (T) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, ___, 28, 30 = 26 (E) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55 = 45 (P) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130 = 110 (A) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, ___, 130, 140 = 120 (S) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, ___, 60, 70 = 50 (U) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39 = 33 (D) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, ___, 14, 16 = 12 (H) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, ___, 24, 26 = 22 (C) · Skip-count by 2s. Fill the blank: 2, 4, ___, 8, 10 = 6 (I) · Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15 = 9 (N) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, ___, 22, 24 = 20 (O) · Skip-count by 5s. Fill the blank: 5, 10, ___, 20, 25 = 15 (R)
- Clue 4 (Place value): "WE FOUND STRANDS OF A RED BANDANA"What number has 1 ten and 8 ones? = 18 (W) · What number has 5 tens and 0 ones? = 50 (F) · What number has 9 tens and 9 ones? = 99 (S) · What number has 3 tens and 9 ones? = 39 (B) · What number has 8 tens and 5 ones? = 85 (E) · What number has 1 ten and 6 ones? = 16 (R) · What number has 2 tens and 6 ones? = 26 (D) · What number has 9 tens and 6 ones? = 96 (O) · What number has 9 tens and 1 one? = 91 (A) · What number has 1 ten and 1 one? = 11 (N) · What number has 9 tens and 3 ones? = 93 (U) · What number has 5 tens and 8 ones? = 58 (T)
- Clue 5 (Missing addends): surviving statement (box 1) → Mallow8 + ___ = 12 = 4 · 8 + ___ = 18 = 10 · 6 + ___ = 15 = 9 · 5 + ___ = 17 = 12 · 5 + ___ = 13 = 8 · 3 + ___ = 6 = 3 · 4 + ___ = 11 = 7 · 4 + ___ = 9 = 5 · 3 + ___ = 14 = 11 · 5 + ___ = 7 = 2 · 8 + ___ = 14 = 6
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 Case of the Golden Pineapple — set in Coconut Cove
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects