🔎 HolesGrade 2Reading: grades 1-2SubtractionWord problemsMultiplicationRoundingMissing addends
The Camp Green Lake Mystery
Someone dug up the Wardens secret treasure chest last night. We must find the sneaky dirt thief who did 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
| Name | Shovel Tool | Camp Badge | Shoveling Hand | Sun Hat Style | Secret Fear |
|---|---|---|---|---|---|
| Mr Pendanski | Splatters Shield | Tent Captain | Righty Shoveler | Red Sunhat | Fear of Water |
| Twitch | Golden Shovel | Shovel Tuner | Righty Shoveler | Dusty Cap | Fear of Peaches |
| Mr Sir | Splatters Shield | Dirt Inspector | Righty Shoveler | Dusty Cap | Fear of Water |
| Magnet | Sack of Onions | Water Carrier | Righty Shoveler | Red Sunhat | Fear of Water |
| Stanley III | Golden Shovel | Water Carrier | Righty Shoveler | Dusty Cap | Fear of Peaches |
| Armpit | Canteen Belt | Shovel Tuner | Lefty Shoveler | Red Sunhat | Fear of Water |
| Derrick | Sack of Onions | Water Carrier | Lefty Shoveler | Dusty Cap | Fear of Water |
| Zigzag | Heavy Pickaxe | Shovel Tuner | Righty Shoveler | Red Sunhat | Fear of Water |
| Linda | Canteen Belt | Water Carrier | Righty Shoveler | Red Sunhat | Fear of Peaches |
| Barfbag | Sack of Onions | Shovel Tuner | Righty Shoveler | Dusty Cap | Fear of Lizards |
| XRay | Golden Shovel | Tent Captain | Righty Shoveler | Straw Fedora | Fear of Water |
| Kate | Sack of Onions | Dirt Inspector | Lefty Shoveler | Red Sunhat | Fear of Peaches |
| Squid | Golden Shovel | Tent Captain | Righty Shoveler | Red Sunhat | Fear of Water |
| Warden | Heavy Pickaxe | Lizard Wrangler | Righty Shoveler | Red Sunhat | Fear of Water |
| Sam | Heavy Pickaxe | Lizard Wrangler | Lefty Shoveler | Red Sunhat | Fear of Water |
| Clyde | Sack of Onions | Dirt Inspector | Lefty Shoveler | Dusty Cap | Fear of Lizards |
| Trout | Sack of Onions | Tent Captain | Righty Shoveler | Red Sunhat | Fear of Lizards |
| Zero | Sack of Onions | Dirt Inspector | Righty Shoveler | Straw Fedora | Fear of Water |
| Zeroni | Canteen Belt | Lizard Wrangler | Lefty Shoveler | Straw Fedora | Fear of Peaches |
| Tiffany | Canteen Belt | Shovel Tuner | Righty Shoveler | Straw Fedora | Fear of Water |
| Hector | Canteen Belt | Dirt Inspector | Lefty Shoveler | Red Sunhat | Fear of Lizards |
Clue 1
Subtraction
We count the shovels in the shed. Some are missing from the rack.
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
33
29
86
19
46
60
46
85
44
13
46
39
85
16
T
42
44
20
44
T
42
29
19
86
44
19
19
46
29
19
46 - 4 =T
45 - 6 =S
26 - 7 =R
125 - 39 =C
61 - 1 =M
124 - 39 =N
67 - 38 =E
76 - 30 =I
32 - 12 =W
52 - 39 =L
22 - 6 =O
54 - 10 =A
44 - 11 =H
0/13 letters found
Clue 2
Word problems
Stanley writes down a note about the suspect in the dirt.
Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.
Awitnesssawthevillainwas .
R
40
11
25
19
31
37
6
19
O
V
E
L
E
R
40
Stanley lined up 8 rows of 5 lizard jars. How many lizard jars in all?R
Stanley found 6 canteen cups yesterday and 5 more today. How many canteen cups in all?I
There were 47 dry boots. 10 were used up. How many dry boots are left?Y
Stanley found 17 canteen cups yesterday and 14 more today. How many canteen cups in all?T
Stanley found 9 onions yesterday and 16 more today. How many onions in all?G
There were 28 dry boots. 9 were used up. How many dry boots are left?H
There were 15 onions. 9 were used up. How many onions are left?S
0/7 letters found
Clue 3
Multiplication facts (1-12)
We see neat rows of tents. Each row has the same number of cots.
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
44
14
144
11
15
4
110
45
9
T
44
144
88
30
21
30
11
22
110
120
80
30
15
4
24
30
15
14
120
22
21
30
T
44
144
110
11 × 4 =T
10 × 12 =O
5 × 3 =S
11 × 10 =R
3 × 7 =W
12 × 12 =E
1 × 11 =Y
1 × 9 =N
5 × 6 =A
4 × 1 =P
9 × 5 =I
11 × 2 =F
10 × 8 =M
4 × 6 =L
11 × 8 =D
2 × 7 =H
0/16 letters found
Clue 4
Rounding
The dusty old scale only gives us a rough rounded weight of the boots.
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
40
80
50
800
70
600
900
700
300
90
500
700
20
500
80
900
90
60
500
80
700
900
50
500
800
400
700
60
700
90
Round 41 to the nearest tenW
Round 649 to the nearest hundredN
Round 60 to the nearest tenH
Round 471 to the nearest hundredR
Round 701 to the nearest hundredA
Round 19 to the nearest tenY
Round 846 to the nearest hundredO
Round 82 to the nearest tenE
Round 372 to the nearest hundredM
Round 282 to the nearest hundredS
Round 74 to the nearest tenU
Round 877 to the nearest hundredD
Round 86 to the nearest tenT
Round 51 to the nearest tenF
0/14 letters found
Clue 5
Missing addends — the last clue
We have some onions in the bag but we need more to make a full sack.
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
10 + ___ = 18
10 + ___ = 17
4 + ___ = 16
8 + ___ = 9
9 + ___ = 12
7 + ___ = 11
7 + ___ = 18
1 + ___ = 3
8 + ___ = 13
8 + ___ = 17
6 + ___ = 16
Step 2 — cross out the sentence with each answer
1.The villain scooped up a pile of dry dirt, then scrambled up the big thumb mountain.
2.The villain scooped up a pile of dry dirt, then dashed toward the dry lake.
3.The villain scooped up a pile of dry dirt, then ran off into the desert.
4.The villain dug a deep hole in the clay, then dashed toward the dry lake.
5.The villain carved out a giant trench, then ran off into the desert.
6.The villain cleared a path through the sand, then ran off into the desert.
7.The villain dug a deep hole in the clay, then hid in the shadow of a tent.
8.The villain cleared a path through the sand, then dashed toward the dry lake.
9.The villain tossed a shovel full of gravel, then scrambled up the big thumb mountain.
10.The villain cleared a path through the sand, then scrambled up the big thumb mountain.
11.The villain dug a deep hole in the clay, then scrambled up the big thumb mountain.
12.The villain scooped up a pile of dry dirt, then hid in the shadow of a tent.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Camp Green Lake Mystery
Culprit: Warden (Heavy Pickaxe · Lizard Wrangler · Righty Shoveler · Red Sunhat · Fear of Water)
- Clue 1 (Subtraction): "THE CRIMINAL IS NOT A WATER CARRIER"46 - 4 = 42 (T) · 45 - 6 = 39 (S) · 26 - 7 = 19 (R) · 125 - 39 = 86 (C) · 61 - 1 = 60 (M) · 124 - 39 = 85 (N) · 67 - 38 = 29 (E) · 76 - 30 = 46 (I) · 32 - 12 = 20 (W) · 52 - 39 = 13 (L) · 22 - 6 = 16 (O) · 54 - 10 = 44 (A) · 44 - 11 = 33 (H)
- Clue 2 (Word problems): "RIGHTY SHOVELER"Stanley lined up 8 rows of 5 lizard jars. How many lizard jars in all? = 40 (R) · Stanley found 6 canteen cups yesterday and 5 more today. How many canteen cups in all? = 11 (I) · There were 47 dry boots. 10 were used up. How many dry boots are left? = 37 (Y) · Stanley found 17 canteen cups yesterday and 14 more today. How many canteen cups in all? = 31 (T) · Stanley found 9 onions yesterday and 16 more today. How many onions in all? = 25 (G) · There were 28 dry boots. 9 were used up. How many dry boots are left? = 19 (H) · There were 15 onions. 9 were used up. How many onions are left? = 6 (S)
- Clue 3 (Multiplication facts (1-12)): "THEY SPRINTED AWAY FROM A SPLASH OF WATER"11 × 4 = 44 (T) · 10 × 12 = 120 (O) · 5 × 3 = 15 (S) · 11 × 10 = 110 (R) · 3 × 7 = 21 (W) · 12 × 12 = 144 (E) · 1 × 11 = 11 (Y) · 1 × 9 = 9 (N) · 5 × 6 = 30 (A) · 4 × 1 = 4 (P) · 9 × 5 = 45 (I) · 11 × 2 = 22 (F) · 10 × 8 = 80 (M) · 4 × 6 = 24 (L) · 11 × 8 = 88 (D) · 2 × 7 = 14 (H)
- Clue 4 (Rounding): "WE FOUND A STRAY RED THREAD FROM A HAT"Round 41 to the nearest ten = 40 (W) · Round 649 to the nearest hundred = 600 (N) · Round 60 to the nearest ten = 60 (H) · Round 471 to the nearest hundred = 500 (R) · Round 701 to the nearest hundred = 700 (A) · Round 19 to the nearest ten = 20 (Y) · Round 846 to the nearest hundred = 800 (O) · Round 82 to the nearest ten = 80 (E) · Round 372 to the nearest hundred = 400 (M) · Round 282 to the nearest hundred = 300 (S) · Round 74 to the nearest ten = 70 (U) · Round 877 to the nearest hundred = 900 (D) · Round 86 to the nearest ten = 90 (T) · Round 51 to the nearest ten = 50 (F)
- Clue 5 (Missing addends): surviving statement (box 6) → Warden10 + ___ = 18 = 8 · 10 + ___ = 17 = 7 · 4 + ___ = 16 = 12 · 8 + ___ = 9 = 1 · 9 + ___ = 12 = 3 · 7 + ___ = 11 = 4 · 7 + ___ = 18 = 11 · 1 + ___ = 3 = 2 · 8 + ___ = 13 = 5 · 8 + ___ = 17 = 9 · 6 + ___ = 16 = 10
About this mystery
- Grade level
- Grade 2 math
- Math topics
- Subtraction, Word problems, Multiplication, Rounding, Missing addends
- Reading level
- grades 1-2
- Theme
- The Camp Green Lake Mystery — set in Camp Green Lake desert
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects