🔎 Halloween, ghosts, vampires,Grade 4Reading: grades 3-4AdditionSubtractionMultiplicationWord problemsMissing addends
The Midnight Monster Mystery
Someone crashed the Midnight Monster Masquerade and hid the golden pumpkin trophy! Detective, search for clues around the creepy mansion to catch the culprit.
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 | Monster Ability | Spooky Item | Glow Style | Fur or Hair | Weakness |
|---|---|---|---|---|---|
| Gargoyle Gary | Mummy Wrap | Silver Lantern | Left Hand Glow | Silver Monster Fur | Garlic Smell |
| Dracula | Vampire Dash | Bat Cloak | Left Hand Glow | Silver Monster Fur | Bright Flashlight |
| Banshee Bella | Zombie Walk | Shadow Ring | Right Hand Glow | Silver Monster Fur | Garlic Smell |
| Haunter Hal | Vampire Dash | Silver Lantern | Right Hand Glow | Silver Monster Fur | Bright Flashlight |
| Spooky Spike | Vampire Dash | Magic Wand | Left Hand Glow | Silver Monster Fur | Bright Flashlight |
| Mummy Curse | Ghost Float | Glow Pumpkin | Right Hand Glow | Silver Monster Fur | Garlic Smell |
| Frankenstein | Zombie Walk | Glow Pumpkin | Right Hand Glow | Silver Monster Fur | Garlic Smell |
| Zombie Zee | Wolf Howl | Silver Lantern | Left Hand Glow | Shaggy Green Hair | Loud Whistle |
| Crypt Chris | Ghost Float | Bat Cloak | Right Hand Glow | Silver Monster Fur | Garlic Smell |
| Creepy Carl | Wolf Howl | Bat Cloak | Left Hand Glow | Shaggy Green Hair | Loud Whistle |
| Specter Sue | Zombie Walk | Silver Lantern | Left Hand Glow | Silver Monster Fur | Loud Whistle |
| Count Vlad | Zombie Walk | Bat Cloak | Right Hand Glow | Wild Purple Hair | Garlic Smell |
| Wolfman Jack | Wolf Howl | Glow Pumpkin | Left Hand Glow | Silver Monster Fur | Garlic Smell |
| Goblin Gabe | Vampire Dash | Silver Lantern | Left Hand Glow | Wild Purple Hair | Loud Whistle |
| Witch Hazel | Zombie Walk | Glow Pumpkin | Right Hand Glow | Silver Monster Fur | Bright Flashlight |
| Swampy Sid | Ghost Float | Shadow Ring | Left Hand Glow | Wild Purple Hair | Bright Flashlight |
| Shadow Sean | Zombie Walk | Shadow Ring | Right Hand Glow | Shaggy Green Hair | Loud Whistle |
| Ghoul Guy | Mummy Wrap | Magic Wand | Right Hand Glow | Silver Monster Fur | Garlic Smell |
| Vampira Val | Zombie Walk | Bat Cloak | Right Hand Glow | Silver Monster Fur | Loud Whistle |
| Casper Ghost | Wolf Howl | Bat Cloak | Left Hand Glow | Shaggy Green Hair | Garlic Smell |
| Skeleton Sam | Zombie Walk | Magic Wand | Left Hand Glow | Silver Monster Fur | Garlic Smell |
Clue 1
Addition
We counted all the pumpkin candy wrappers left on the floor to find our first track.
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
6917
7321
4921
4076
2476
2777
2777
2484
2476
5516
7423
9062
4921
4221
5516
9062
T
6917
7321
2484
4076
4921
2484
3644
2484
8799
2476
2481
2849
2484
5516
7423
2086 + 4831 =T
1547 + 1230 =L
2628 + 2888 =N
4285 + 3138 =D
4248 + 4551 =G
4297 + 4765 =O
1500 + 976 =I
3603 + 3718 =H
2730 + 1491 =S
1054 + 1427 =C
855 + 1629 =A
1707 + 3214 =E
1353 + 2291 =M
1848 + 1001 =W
1992 + 2084 =V
0/15 letters found
Clue 2
Subtraction
We took away the fake footsteps from the real tracks left near the trophy display.
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
3753
4271
2065
6974
8549
7794
4572
4572
4572
A
3753
4271
A
3753
7715
2065
4702
6867
6974
6867
A
3753
8549
7865
4702
8995
8462
4271
7686 - 3933 =A
9385 - 2518 =H
8497 - 4226 =W
13763 - 4768 =L
8853 - 391 =O
11381 - 3666 =R
5434 - 862 =S
11317 - 2768 =N
4050 - 1985 =I
8370 - 3668 =G
11887 - 4913 =T
12008 - 4143 =D
8056 - 262 =E
0/13 letters found
Clue 3
Multiplication facts (1-12)
The villain stepped on equal rows of creepy spiderwebs across the mansion hall.
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
2
50
27
45
1
27
99
35
44
24
7
40
10
70
80
T
2
70
99
1
144
70
36
6
22
99
70
40
80
24
45
6
27
40
40
1 × 2 =T
7 × 10 =R
9 × 11 =A
2 × 3 =M
8 × 5 =L
2 × 5 =P
10 × 8 =I
1 × 1 =N
11 × 4 =Y
8 × 3 =C
2 × 11 =G
5 × 9 =S
7 × 1 =U
3 × 9 =E
7 × 5 =K
10 × 5 =H
4 × 9 =O
12 × 12 =F
0/18 letters found
Clue 4
Word problems
Our detective crew solved monster riddle clues left behind in the dark library.
Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.
Astrandof hairturnedupatthescene.
S
20
55
25
40
52
6
62
O
N
S
20
T
52
6
F
U
6
Junior Detective lined up 2 rows of 10 mini pumpkins. How many mini pumpkins in all?S
There were 66 spooky stickers. 11 were used up. How many spooky stickers are left?I
There were 40 glow sticks. 34 were used up. How many glow sticks are left?R
Junior Detective found 12 vampire fangs yesterday and 50 more today. How many vampire fangs in all?M
There were 88 glow sticks. 36 were used up. How many glow sticks are left?E
Junior Detective lined up 10 rows of 4 spooky stickers. How many spooky stickers in all?V
Junior Detective found 6 glow sticks yesterday and 19 more today. How many glow sticks in all?L
0/7 letters found
Clue 5
Missing addends — the last clue
We filled in the missing numbers on the locked dungeon keypad to open the door.
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
33 + ___ = 43
12 + ___ = 21
21 + ___ = 32
10 + ___ = 18
1 + ___ = 3
27 + ___ = 33
40 + ___ = 43
35 + ___ = 40
34 + ___ = 41
4 + ___ = 5
37 + ___ = 41
Step 2 — cross out the sentence with each answer
1.The villain floated through the haunted hallway, then turned a shadow ring.
2.The villain wrapped up the secret doorway, then swished a bat cloak.
3.The villain howled loudly at the full moon, then lit up a glow pumpkin.
4.The villain stumbled past the cobwebs, then shined a silver lantern.
5.The villain howled loudly at the full moon, then turned a shadow ring.
6.The villain howled loudly at the full moon, then waved a magic wand.
7.The villain stumbled past the cobwebs, then waved a magic wand.
8.The villain dashed fast across the ballroom, then swished a bat cloak.
9.The villain floated through the haunted hallway, then lit up a glow pumpkin.
10.The villain stumbled past the cobwebs, then turned a shadow ring.
11.The villain stumbled past the cobwebs, then lit up a glow pumpkin.
12.The villain floated through the haunted hallway, then swished a bat cloak.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Midnight Monster Mystery
Culprit: Crypt Chris (Ghost Float · Bat Cloak · Right Hand Glow · Silver Monster Fur · Garlic Smell)
- Clue 1 (Addition): "THE VILLAIN DOES NOT HAVE A MAGIC WAND"2086 + 4831 = 6917 (T) · 1547 + 1230 = 2777 (L) · 2628 + 2888 = 5516 (N) · 4285 + 3138 = 7423 (D) · 4248 + 4551 = 8799 (G) · 4297 + 4765 = 9062 (O) · 1500 + 976 = 2476 (I) · 3603 + 3718 = 7321 (H) · 2730 + 1491 = 4221 (S) · 1054 + 1427 = 2481 (C) · 855 + 1629 = 2484 (A) · 1707 + 3214 = 4921 (E) · 1353 + 2291 = 3644 (M) · 1848 + 1001 = 2849 (W) · 1992 + 2084 = 4076 (V)
- Clue 2 (Subtraction): "A WITNESS SAW A RIGHT HAND GLOW"7686 - 3933 = 3753 (A) · 9385 - 2518 = 6867 (H) · 8497 - 4226 = 4271 (W) · 13763 - 4768 = 8995 (L) · 8853 - 391 = 8462 (O) · 11381 - 3666 = 7715 (R) · 5434 - 862 = 4572 (S) · 11317 - 2768 = 8549 (N) · 4050 - 1985 = 2065 (I) · 8370 - 3668 = 4702 (G) · 11887 - 4913 = 6974 (T) · 12008 - 4143 = 7865 (D) · 8056 - 262 = 7794 (E)
- Clue 3 (Multiplication facts (1-12)): "THE SNEAKY CULPRIT RAN FROM GARLIC SMELL"1 × 2 = 2 (T) · 7 × 10 = 70 (R) · 9 × 11 = 99 (A) · 2 × 3 = 6 (M) · 8 × 5 = 40 (L) · 2 × 5 = 10 (P) · 10 × 8 = 80 (I) · 1 × 1 = 1 (N) · 11 × 4 = 44 (Y) · 8 × 3 = 24 (C) · 2 × 11 = 22 (G) · 5 × 9 = 45 (S) · 7 × 1 = 7 (U) · 3 × 9 = 27 (E) · 7 × 5 = 35 (K) · 10 × 5 = 50 (H) · 4 × 9 = 36 (O) · 12 × 12 = 144 (F)
- Clue 4 (Word problems): "SILVER MONSTER FUR"Junior Detective lined up 2 rows of 10 mini pumpkins. How many mini pumpkins in all? = 20 (S) · There were 66 spooky stickers. 11 were used up. How many spooky stickers are left? = 55 (I) · There were 40 glow sticks. 34 were used up. How many glow sticks are left? = 6 (R) · Junior Detective found 12 vampire fangs yesterday and 50 more today. How many vampire fangs in all? = 62 (M) · There were 88 glow sticks. 36 were used up. How many glow sticks are left? = 52 (E) · Junior Detective lined up 10 rows of 4 spooky stickers. How many spooky stickers in all? = 40 (V) · Junior Detective found 6 glow sticks yesterday and 19 more today. How many glow sticks in all? = 25 (L)
- Clue 5 (Missing addends): surviving statement (box 12) → Crypt Chris33 + ___ = 43 = 10 · 12 + ___ = 21 = 9 · 21 + ___ = 32 = 11 · 10 + ___ = 18 = 8 · 1 + ___ = 3 = 2 · 27 + ___ = 33 = 6 · 40 + ___ = 43 = 3 · 35 + ___ = 40 = 5 · 34 + ___ = 41 = 7 · 4 + ___ = 5 = 1 · 37 + ___ = 41 = 4
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Addition, Subtraction, Multiplication, Word problems, Missing addends
- Reading level
- grades 3-4
- Theme
- The Midnight Monster Mystery — set in Spooksville Manor
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects