🔎 Halloween, ghosts, vampires,Grade 5Reading: grades 3-4AdditionSubtractionMultiplicationFractions of a numberDivision

The Midnight Monster Mash Mystery

Someone crashed the Spooksville Manor Halloween party and stole the Golden Pumpkin Trophy! Solve the math clues to uncover 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	Monster Type	Halloween Gear	Dominant Hand	Fur Color	Spooky Weakness
Bram Stoker	Ghost	Magic Cauldron	Left Handed	Pumpkin Orange	Squeaky Toys
Phantom Phil	Zombie	Silver Whistle	Left Handed	Pumpkin Orange	Garlic Bread
Spooky Sam	Zombie	Silver Whistle	Right Handed	Neon Green	Squeaky Toys
Shadow Sean	Vampire	Silver Whistle	Left Handed	Pumpkin Orange	Squeaky Toys
Count Vlad	Vampire	Silver Whistle	Right Handed	Pumpkin Orange	Garlic Bread
Wolfie Smith	Swamp Beast	Flying Broom	Left Handed	Pumpkin Orange	Garlic Bread
Luna Howl	Zombie	Silver Whistle	Left Handed	Pumpkin Orange	Bright Flashlights
Fang Foot	Werewolf	Flying Broom	Left Handed	Pumpkin Orange	Bright Flashlights
Mystic Molly	Swamp Beast	Silver Whistle	Left Handed	Pumpkin Orange	Garlic Bread
Mummy Boris	Vampire	Trick Bag	Right Handed	Pumpkin Orange	Garlic Bread
Pixie Pete	Werewolf	Trick Bag	Left Handed	Midnight Black	Bright Flashlights
Spirit Sarah	Ghost	Magic Cauldron	Left Handed	Midnight Black	Bright Flashlights
Draco Fang	Swamp Beast	Flying Broom	Right Handed	Neon Green	Squeaky Toys
Swampy Sam	Werewolf	Magic Cauldron	Left Handed	Pumpkin Orange	Garlic Bread
Batty Betty	Vampire	Magic Cauldron	Right Handed	Midnight Black	Garlic Bread
Haunt Harry	Swamp Beast	Glowing Lantern	Left Handed	Midnight Black	Garlic Bread
Goblin Greg	Zombie	Magic Cauldron	Left Handed	Midnight Black	Squeaky Toys
Fang Fiona	Werewolf	Flying Broom	Right Handed	Midnight Black	Bright Flashlights
Igor Spike	Zombie	Magic Cauldron	Left Handed	Neon Green	Squeaky Toys
Ghostly Gemma	Vampire	Silver Whistle	Left Handed	Pumpkin Orange	Garlic Bread
Ghoul Gabe	Ghost	Trick Bag	Right Handed	Midnight Black	Squeaky Toys

Clue 1

Addition

We counted the candy corn collected at the front door to unlock 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.

3839

9267

4273

5620

2178

4432

7099

2178

4393

4800

6319

4273

4000

4393

6319

3839

4591

4000

4273

7099

7925

7099

9489

2178

3302

7099

4591

4432

4800

7105

6319

4393

2255 + 1584 =T

2161 + 4938 =A

1274 + 904 =I

3056 + 1744 =D

1952 + 2639 =U

3277 + 5990 =H

3122 + 2498 =V

1953 + 2479 =L

4567 + 3358 =M

2245 + 1057 =C

2174 + 1826 =S

2542 + 4563 =R

3488 + 6001 =G

1521 + 2872 =N

2296 + 1977 =E

2718 + 3601 =O

0/16 letters found

Clue 2

Subtraction

We checked how many glow sticks were missing from the supply box.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

5248

6152

7923

3784

5727

3784

4908

7923

5330

5248

8635

7923

1205

5248

6713

8635

7923

1205

5248

6152

6713

3441

3501

4908

6462

5628

3441

5248

8228 - 2980 =T

7768 - 2860 =P

7300 - 3859 =N

11829 - 3194 =L

4889 - 1105 =S

5328 - 4123 =F

9839 - 3377 =R

6617 - 465 =H

9282 - 2569 =A

11777 - 3854 =E

4838 - 1337 =D

6571 - 844 =U

8530 - 2902 =I

5972 - 642 =C

0/14 letters found

Clue 3

Multiplication facts (1-12)

We searched five equal rows of spooky pumpkins in the haunted garden.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

108

9 × 12 =T

1 × 7 =L

4 × 2 =C

11 × 1 =H

8 × 8 =G

4 × 4 =O

2 × 6 =M

12 × 8 =V

2 × 5 =B

7 × 2 =N

1 × 3 =A

4 × 9 =R

7 × 10 =I

9 × 1 =E

8 × 4 =D

8 × 9 =F

0/16 letters found

Clue 4

Fractions of a number

We figured out what fraction of the magic potion bottles were tipped over.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

2/8 of 12 =F

1/3 of 93 =E

2/4 of 14 =A

2/10 of 70 =M

4/10 of 50 =S

1/4 of 104 =O

1/3 of 66 =G

4/8 of 46 =K

9/10 of 10 =H

3/10 of 50 =P

1/4 of 52 =D

1/2 of 4 =R

2/10 of 55 =T

2/5 of 100 =C

1/5 of 90 =N

5/6 of 42 =I

5/10 of 38 =U

0/17 letters found

Clue 5

Division facts (1-12) — the last clue

We divided the leftover trick or treat bags equally among the detectives.

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

12 ÷ 1 = ?

8 ÷ 4 = ?

45 ÷ 9 = ?

48 ÷ 12 = ?

7 ÷ 1 = ?

30 ÷ 5 = ?

18 ÷ 2 = ?

96 ÷ 12 = ?

120 ÷ 12 = ?

18 ÷ 6 = ?

132 ÷ 12 = ?

Step 2 — cross out the sentence with each answer

1.The villain stumbled past cobwebs, then blew a loud silver whistle.

2.The villain splashed through slime, then swept away on a flying broom.

3.The villain rattled spooky chains, then stirred up a magic cauldron.

4.The villain floated through walls, then lit the dark with a glowing lantern.

5.The villain floated through walls, then blew a loud silver whistle.

6.The villain splashed through slime, then stirred up a magic cauldron.

7.The villain howled at the moon, then grabbed a trick bag.

8.The villain floated through walls, then swept away on a flying broom.

9.The villain splashed through slime, then grabbed a trick bag.

10.The villain floated through walls, then grabbed a trick bag.

11.The villain stumbled past cobwebs, then stirred up a magic cauldron.

12.The villain splashed through slime, then blew a loud silver whistle.

Solve it

Name the culprit

Choose the one suspect left standing.

Answer Key — The Midnight Monster Mash Mystery

Culprit: Phantom Phil (Zombie · Silver Whistle · Left Handed · Pumpkin Orange · Garlic Bread)

Clue 1 (Addition): "THE VILLAIN DOES NOT USE A MAGIC CAULDRON"
2255 + 1584 = 3839 (T) · 2161 + 4938 = 7099 (A) · 1274 + 904 = 2178 (I) · 3056 + 1744 = 4800 (D) · 1952 + 2639 = 4591 (U) · 3277 + 5990 = 9267 (H) · 3122 + 2498 = 5620 (V) · 1953 + 2479 = 4432 (L) · 4567 + 3358 = 7925 (M) · 2245 + 1057 = 3302 (C) · 2174 + 1826 = 4000 (S) · 2542 + 4563 = 7105 (R) · 3488 + 6001 = 9489 (G) · 1521 + 2872 = 4393 (N) · 2296 + 1977 = 4273 (E) · 2718 + 3601 = 6319 (O)
Clue 2 (Subtraction): "THE SUSPECT LEFT A LEFT HAND PRINT"
8228 - 2980 = 5248 (T) · 7768 - 2860 = 4908 (P) · 7300 - 3859 = 3441 (N) · 11829 - 3194 = 8635 (L) · 4889 - 1105 = 3784 (S) · 5328 - 4123 = 1205 (F) · 9839 - 3377 = 6462 (R) · 6617 - 465 = 6152 (H) · 9282 - 2569 = 6713 (A) · 11777 - 3854 = 7923 (E) · 4838 - 1337 = 3501 (D) · 6571 - 844 = 5727 (U) · 8530 - 2902 = 5628 (I) · 5972 - 642 = 5330 (C)
Clue 3 (Multiplication facts (1-12)): "THE VILLAIN RAN FROM GARLIC BREAD"
9 × 12 = 108 (T) · 1 × 7 = 7 (L) · 4 × 2 = 8 (C) · 11 × 1 = 11 (H) · 8 × 8 = 64 (G) · 4 × 4 = 16 (O) · 2 × 6 = 12 (M) · 12 × 8 = 96 (V) · 2 × 5 = 10 (B) · 7 × 2 = 14 (N) · 1 × 3 = 3 (A) · 4 × 9 = 36 (R) · 7 × 10 = 70 (I) · 9 × 1 = 9 (E) · 8 × 4 = 32 (D) · 8 × 9 = 72 (F)
Clue 4 (Fractions of a number): "FOUND PUMPKIN ORANGE HAIR AT SCENE"
2/8 of 12 = 3 (F) · 1/3 of 93 = 31 (E) · 2/4 of 14 = 7 (A) · 2/10 of 70 = 14 (M) · 4/10 of 50 = 20 (S) · 1/4 of 104 = 26 (O) · 1/3 of 66 = 22 (G) · 4/8 of 46 = 23 (K) · 9/10 of 10 = 9 (H) · 3/10 of 50 = 15 (P) · 1/4 of 52 = 13 (D) · 1/2 of 4 = 2 (R) · 2/10 of 55 = 11 (T) · 2/5 of 100 = 40 (C) · 1/5 of 90 = 18 (N) · 5/6 of 42 = 35 (I) · 5/10 of 38 = 19 (U)
Clue 5 (Division facts (1-12)): surviving statement (box 1) → Phantom Phil
12 ÷ 1 = 12 · 8 ÷ 4 = 2 · 45 ÷ 9 = 5 · 48 ÷ 12 = 4 · 7 ÷ 1 = 7 · 30 ÷ 5 = 6 · 18 ÷ 2 = 9 · 96 ÷ 12 = 8 · 120 ÷ 12 = 10 · 18 ÷ 6 = 3 · 132 ÷ 12 = 11

About this mystery

Grade level: Grade 5 math
Math topics: Addition, Subtraction, Multiplication, Fractions of a number, Division
Reading level: grades 3-4
Theme: The Midnight Monster Mash Mystery — set in Spooksville Manor
Format: Interactive online & printable worksheet with answer key
Solution: One unique, verified culprit among 21 suspects

More free printable math cases

5th grade worksheets Addition worksheets Subtraction worksheets Multiplication worksheets Division worksheets Fractions of a number worksheets All worksheets →

The Case of the Missing Diamond Mic

Grade 5

The Starlight Station Sabotage

Grade 5

The Cipher Syndicate Mystery

Grade 5

The Mystery of the Midnight Arc-Drive

Grade 5