🐱 CatsGrade 2Reading: grades 3-4AdditionPlace valueSkip countingSubtractionMissing addends
The Great Yarn Museum Mystery
The shiny Golden Catnip Mouse has been swiped from the museum vault! Detective Whisker is on the case, but there are too many suspects. Help us decode the clues and catch the sneaky 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 | Primary Skill | Escape Method | Dominant Paw | Fur Pattern | Greatest Fear |
|---|---|---|---|---|---|
| Nala | Laser Pointer | Quick Dash | Left pawed | Orange stripes | Water spray |
| Gizmo | Super Spring | High Leap | Left pawed | Orange stripes | Squeaky mouse |
| Tigger | Yarn Roll | Night Vision | Left pawed | Orange stripes | Water spray |
| Bella | Catnip Blast | Scratch Attack | Left pawed | Fluffy white | Water spray |
| Garfield | Super Spring | Night Vision | Right pawed | Fluffy white | Water spray |
| Boots | Super Spring | Mega Meow | Left pawed | Sleek black | Water spray |
| Milo | Laser Pointer | Quick Dash | Left pawed | Fluffy white | Squeaky mouse |
| Oreo | Catnip Blast | Mega Meow | Left pawed | Orange stripes | Water spray |
| Oliver | Yarn Roll | Quick Dash | Right pawed | Orange stripes | Water spray |
| Felix | Laser Pointer | Scratch Attack | Left pawed | Sleek black | Water spray |
| Chloe | Silent Paws | High Leap | Right pawed | Orange stripes | Squeaky mouse |
| Loki | Laser Pointer | Night Vision | Right pawed | Fluffy white | Squeaky mouse |
| Tom | Yarn Roll | Scratch Attack | Left pawed | Sleek black | Squeaky mouse |
| Sylvester | Laser Pointer | High Leap | Left pawed | Fluffy white | Water spray |
| Socks | Silent Paws | Scratch Attack | Left pawed | Orange stripes | Water spray |
| Simba | Super Spring | High Leap | Left pawed | Orange stripes | Water spray |
| Cleo | Laser Pointer | Mega Meow | Left pawed | Fluffy white | Squeaky mouse |
| Luna | Laser Pointer | Quick Dash | Left pawed | Fluffy white | Crinkly bag |
| Whiskers | Laser Pointer | Mega Meow | Left pawed | Orange stripes | Squeaky mouse |
| Mittens | Silent Paws | Night Vision | Left pawed | Orange stripes | Squeaky mouse |
| Smokey | Super Spring | Quick Dash | Right pawed | Fluffy white | Crinkly bag |
Clue 1
Addition
Detective Whisker counts the empty cat food cans in the alleyway. Add the cans from the morning patrol to the cans found by the dumpster to reveal our 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
66
85
72
T
66
85
40
72
28
68
79
72
81
96
79
T
66
85
69
74
72
96
40
91
85
T
66
74
40
81
40
79
96
28 + 38 =T
50 + 46 =N
18 + 10 =F
41 + 27 =D
41 + 31 =E
28 + 12 =I
56 + 29 =H
52 + 29 =S
40 + 34 =V
34 + 45 =O
26 + 43 =A
35 + 56 =G
0/12 letters found
Clue 2
Place value
The museum digital security scanner flashes a warning code. Look at the tens digit and the ones digit on the screen to unlock the next piece of evidence.
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
95
43
80
T
95
43
26
80
72
25
35
24
87
25
80
48
84
13
84
46
80
52
26
T
95
43
T
95
43
80
14
80
72
T
95
28
84
52
What number has 9 tens and 5 ones?T
What number has 1 ten and 4 ones?L
What number has 2 tens and 5 ones?K
What number has 3 tens and 5 ones?N
What number has 2 tens and 4 ones?O
What number has 7 tens and 2 ones?F
What number has 2 tens and 8 ones?P
What number has 5 tens and 2 ones?W
What number has 4 tens and 3 ones?H
What number has 4 tens and 6 ones?S
What number has 8 tens and 7 ones?C
What number has 4 tens and 8 ones?D
What number has 1 ten and 3 ones?V
What number has 8 tens and 4 ones?A
What number has 2 tens and 6 ones?I
What number has 8 tens and 0 ones?E
0/16 letters found
Clue 3
Skip counting
The thief left dusty paw prints across the lobby floor. Count the prints by twos as they jump along the tiles to find where the suspect dropped a hint.
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
65
33
15
9
18
25
25
80
18
60
40
25
15
15
70
40
55
90
8
80
45
80
T
65
15
55
16
28
55
80
110
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, ___, 70, 75T
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, ___, 18, 21E
Skip-count by 10s. Fill the blank: 10, 20, 30, ___, 50, 60F
Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15V
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110O
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, ___, 70, 80N
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, ___, 90, 100A
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, ___, 75, 80D
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55W
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39H
Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12M
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, ___, 30, 35L
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130Y
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, ___, 20, 22I
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65R
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, ___, 30, 32P
0/17 letters found
Clue 4
Subtraction
A bowl of milk was left tipped over on the counter. Subtract the spilled ounces of milk from the full bowl to see how much the cat burglar drank before fleeing.
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
21
59
89
30
77
58
13
30
55
26
58
25
59
24
16
55
41
74
59
13
89
77
55
26
16
16
61
59
24
49
59
58
59
48 - 27 =W
69 - 20 =C
72 - 13 =E
59 - 33 =A
51 - 38 =D
49 - 33 =T
56 - 31 =G
47 - 17 =O
127 - 38 =F
31 - 7 =S
112 - 35 =U
89 - 34 =R
43 - 2 =I
77 - 3 =P
77 - 16 =H
81 - 23 =N
0/16 letters found
Clue 5
Missing addends — the last clue
The museum guards need ten toys to tempt the suspect out of hiding. We only have seven toys ready. Solve for the missing number of toys to get the final clue.
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 + ___ = 18
9 + ___ = 21
1 + ___ = 7
1 + ___ = 4
3 + ___ = 4
5 + ___ = 9
3 + ___ = 13
4 + ___ = 6
2 + ___ = 7
6 + ___ = 14
5 + ___ = 12
Step 2 — cross out the sentence with each answer
1.The villain shines a bright laser pointer, then escapes with a high leap.
2.The villain releases a catnip blast, then escapes with a high leap.
3.The villain creeps on silent paws, then escapes with a high leap.
4.The villain rolls a giant yarn ball, then distracts the guards with a mega meow.
5.The villain bounces on a super spring, then slashes with a scratch attack.
6.The villain creeps on silent paws, then slashes with a scratch attack.
7.The villain rolls a giant yarn ball, then escapes with a high leap.
8.The villain bounces on a super spring, then slips through the dark using night vision.
9.The villain bounces on a super spring, then escapes with a high leap.
10.The villain rolls a giant yarn ball, then speeds away with a quick dash.
11.The villain releases a catnip blast, then distracts the guards with a mega meow.
12.The villain shines a bright laser pointer, then speeds away with a quick dash.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Great Yarn Museum Mystery
Culprit: Simba (Super Spring · High Leap · Left pawed · Orange stripes · Water spray)
- Clue 1 (Addition): "THE THIEF DOES NOT HAVE NIGHT VISION"28 + 38 = 66 (T) · 50 + 46 = 96 (N) · 18 + 10 = 28 (F) · 41 + 27 = 68 (D) · 41 + 31 = 72 (E) · 28 + 12 = 40 (I) · 56 + 29 = 85 (H) · 52 + 29 = 81 (S) · 40 + 34 = 74 (V) · 34 + 45 = 79 (O) · 26 + 43 = 69 (A) · 35 + 56 = 91 (G)
- Clue 2 (Place value): "THE THIEF KNOCKED A VASE WITH THE LEFT PAW"What number has 9 tens and 5 ones? = 95 (T) · What number has 1 ten and 4 ones? = 14 (L) · What number has 2 tens and 5 ones? = 25 (K) · What number has 3 tens and 5 ones? = 35 (N) · What number has 2 tens and 4 ones? = 24 (O) · What number has 7 tens and 2 ones? = 72 (F) · What number has 2 tens and 8 ones? = 28 (P) · What number has 5 tens and 2 ones? = 52 (W) · What number has 4 tens and 3 ones? = 43 (H) · What number has 4 tens and 6 ones? = 46 (S) · What number has 8 tens and 7 ones? = 87 (C) · What number has 4 tens and 8 ones? = 48 (D) · What number has 1 ten and 3 ones? = 13 (V) · What number has 8 tens and 4 ones? = 84 (A) · What number has 2 tens and 6 ones? = 26 (I) · What number has 8 tens and 0 ones? = 80 (E)
- Clue 3 (Skip counting): "THE VILLAIN FLEED FROM A WATER SPRAY"Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, ___, 70, 75 = 65 (T) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, ___, 18, 21 = 15 (E) · Skip-count by 10s. Fill the blank: 10, 20, 30, ___, 50, 60 = 40 (F) · Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15 = 9 (V) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110 = 90 (O) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, ___, 70, 80 = 60 (N) · 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, ___, 90, 100 = 80 (A) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, ___, 75, 80 = 70 (D) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55 = 45 (W) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39 = 33 (H) · 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, ___, 30, 35 = 25 (L) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130 = 110 (Y) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, ___, 20, 22 = 18 (I) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65 = 55 (R) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, ___, 30, 32 = 28 (P)
- Clue 4 (Subtraction): "WE FOUND ORANGE STRIPED FUR AT THE SCENE"48 - 27 = 21 (W) · 69 - 20 = 49 (C) · 72 - 13 = 59 (E) · 59 - 33 = 26 (A) · 51 - 38 = 13 (D) · 49 - 33 = 16 (T) · 56 - 31 = 25 (G) · 47 - 17 = 30 (O) · 127 - 38 = 89 (F) · 31 - 7 = 24 (S) · 112 - 35 = 77 (U) · 89 - 34 = 55 (R) · 43 - 2 = 41 (I) · 77 - 3 = 74 (P) · 77 - 16 = 61 (H) · 81 - 23 = 58 (N)
- Clue 5 (Missing addends): surviving statement (box 9) → Simba7 + ___ = 18 = 11 · 9 + ___ = 21 = 12 · 1 + ___ = 7 = 6 · 1 + ___ = 4 = 3 · 3 + ___ = 4 = 1 · 5 + ___ = 9 = 4 · 3 + ___ = 13 = 10 · 4 + ___ = 6 = 2 · 2 + ___ = 7 = 5 · 6 + ___ = 14 = 8 · 5 + ___ = 12 = 7
About this mystery
- Grade level
- Grade 2 math
- Math topics
- Addition, Place value, Skip counting, Subtraction, Missing addends
- Reading level
- grades 3-4
- Theme
- The Great Yarn Museum Mystery — set in The Mew-Polis Museum of Fine Yarn
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects