🔎 MonsterGrade 5Reading: grades 5-6MultiplicationFractions of a numberOrder of operationsRoundingDivision
The Midnight Monster Mystery
Oh no! Someone broke into the Academy vault and stole the Golden Scare Trophy right before the big pep rally. The Chief Scare Instructor needs your help to track down the sneaky monster suspect!
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 | Scare Tactic | Mutation | Claw Side | Fur Color | Scare Stopper |
|---|---|---|---|---|---|
| Gillman Swamp | Thunder Stomp | Glow Eyes | Right clawed | Midnight Blue | Flashlight |
| Jack Howler | Acid Spit | Glow Eyes | Right clawed | Static Purple | Flashlight |
| Count Drac | Sonic Howl | Spiky Tail | Left clawed | Static Purple | Flashlight |
| Frankie Stein | Thunder Stomp | Spiky Tail | Right clawed | Neon Green | Loud Whistle |
| Grim Reaper | Sonic Howl | Spiky Tail | Right clawed | Static Purple | Flashlight |
| Shawn Shadow | Slime Trail | Bat Wings | Right clawed | Neon Green | Flashlight |
| Blobby Sue | Sonic Howl | Spiky Tail | Left clawed | Midnight Blue | Loud Whistle |
| Wanda Witch | Slime Trail | Glow Eyes | Right clawed | Neon Green | Flashlight |
| Pennywise Clown | Sonic Howl | Spiky Tail | Right clawed | Static Purple | Squeaky Toy |
| Bob Bigfoot | Shadow Merge | Spiky Tail | Right clawed | Neon Green | Flashlight |
| Zoey Zombie | Thunder Stomp | Glow Eyes | Left clawed | Neon Green | Flashlight |
| Vlad Alucard | Sonic Howl | Glow Eyes | Right clawed | Midnight Blue | Flashlight |
| Spike Goblin | Acid Spit | Glow Eyes | Right clawed | Neon Green | Squeaky Toy |
| Gorgon Medusa | Sonic Howl | Bat Wings | Left clawed | Static Purple | Loud Whistle |
| Grog Ogre | Shadow Merge | Horn Crown | Right clawed | Neon Green | Flashlight |
| Fang Wolfman | Slime Trail | Spiky Tail | Left clawed | Neon Green | Loud Whistle |
| York Yeti | Acid Spit | Horn Crown | Left clawed | Static Purple | Squeaky Toy |
| Bones Skeleton | Sonic Howl | Spiky Tail | Right clawed | Neon Green | Flashlight |
| Orlok Nosferatu | Thunder Stomp | Horn Crown | Right clawed | Midnight Blue | Loud Whistle |
| Gary Gargoyle | Acid Spit | Horn Crown | Left clawed | Midnight Blue | Loud Whistle |
| Nessie Loch | Slime Trail | Horn Crown | Right clawed | Neon Green | Loud Whistle |
Clue 1
Multiplication facts (1-12)
We found rows of muddy footprints in the hallway. Let us count them by multiplying the rows to decode our first lead.
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
50
11
54
48
4
9
9
120
4
10
45
132
54
3
10
132
T
50
11
120
48
54
120
11
132
44
10
63
44
132
77
10
10 × 5 =T
1 × 11 =H
6 × 9 =E
12 × 10 =A
4 × 12 =V
5 × 2 =N
9 × 5 =D
11 × 4 =R
11 × 7 =W
3 × 1 =S
7 × 9 =C
1 × 9 =L
12 × 11 =O
1 × 4 =I
0/14 letters found
Clue 2
Fractions of a number
The suspect spilled a jar of monster glowing eyes. Only a fraction of them are still shining. Calculate the fraction to reveal the next 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
19
10
37
2
28
37
27
14
8
33
6
11
11
27
6
28
6
2
25
6
9
10
T
19
5
11
27
30
37
32
3/6 of 38 =T
2/10 of 30 =I
2/6 of 96 =D
3/6 of 50 =R
2/4 of 60 =W
5/6 of 12 =H
3/6 of 56 =N
5/8 of 8 =C
3/5 of 15 =G
2/8 of 108 =A
4/10 of 35 =K
5/10 of 16 =Y
1/5 of 10 =S
2/4 of 74 =E
2/4 of 22 =L
5/10 of 66 =V
0/16 letters found
Clue 3
Order of operations
A strange monster lock requires us to solve a puzzle in the exact order of operations before it will open.
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
80
79
31
65
74
67
27
36
44
A
80
21
67
44
65
74
67
27
54
65
44
44
21
27
38
40
27
67
71
60
8 × 11 - 8 =A
39 + 8 × 4 =E
8 × 4 - 1 =R
10 × 5 - 6 =L
5 × 11 - 15 =P
53 + 3 × 4 =I
49 + 5 × 5 =G
13 + 2 × 4 =S
6 × 10 - 22 =O
9 × 11 - 20 =B
11 + 8 × 7 =H
15 + 2 × 6 =T
12 + 8 × 6 =M
19 + 7 × 5 =W
11 × 6 - 30 =F
0/15 letters found
Clue 4
Rounding
The heavy weight of the thief broke our scale, so we can only read the rounded weight estimate. Round the number to unlock this secret.
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
7000
20
2000
430
900
2000
110
T
7000
3000
2000
20
200
5000
300
5000
2000
370
5000
230
1100
2000
2000
5000
110
2900
1100
Round 6,958 to the nearest thousandT
Round 427 to the nearest tenY
Round 107 to the nearest tenF
Round 1,141 to the nearest hundredR
Round 2,919 to the nearest hundredU
Round 282 to the nearest hundredD
Round 20 to the nearest tenH
Round 164 to the nearest hundredI
Round 228 to the nearest tenG
Round 1,754 to the nearest thousandE
Round 4,523 to the nearest thousandN
Round 370 to the nearest tenO
Round 3,148 to the nearest thousandB
Round 862 to the nearest hundredL
0/14 letters found
Clue 5
Division facts (1-12) — the last clue
The monsters had to split their energy potions equally. Divide the total potions to get the final code.
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
77 ÷ 7 = ?
7 ÷ 1 = ?
18 ÷ 3 = ?
36 ÷ 3 = ?
120 ÷ 12 = ?
20 ÷ 5 = ?
48 ÷ 6 = ?
33 ÷ 11 = ?
50 ÷ 10 = ?
5 ÷ 5 = ?
2 ÷ 1 = ?
Step 2 — cross out the sentence with each answer
1.The villain fades into a shadow merge, then flashes their glow eyes.
2.The villain sprays hot acid spit, then flashes their glow eyes.
3.The villain shakes the room with a thunder stomp, then waves their webbed hands.
4.The villain lets out a sonic howl, then flashes their glow eyes.
5.The villain leaves a sticky slime trail, then waves their webbed hands.
6.The villain lets out a sonic howl, then whips their spiky tail.
7.The villain fades into a shadow merge, then whips their spiky tail.
8.The villain sprays hot acid spit, then flaps their bat wings.
9.The villain leaves a sticky slime trail, then flaps their bat wings.
10.The villain sprays hot acid spit, then shakes their horn crown.
11.The villain leaves a sticky slime trail, then flashes their glow eyes.
12.The villain sprays hot acid spit, then whips their spiky tail.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Midnight Monster Mystery
Culprit: Shawn Shadow (Slime Trail · Bat Wings · Right clawed · Neon Green · Flashlight)
- Clue 1 (Multiplication facts (1-12)): "THE VILLAIN DOES NOT HAVE A HORN CROWN"10 × 5 = 50 (T) · 1 × 11 = 11 (H) · 6 × 9 = 54 (E) · 12 × 10 = 120 (A) · 4 × 12 = 48 (V) · 5 × 2 = 10 (N) · 9 × 5 = 45 (D) · 11 × 4 = 44 (R) · 11 × 7 = 77 (W) · 3 × 1 = 3 (S) · 7 × 9 = 63 (C) · 1 × 9 = 9 (L) · 12 × 11 = 132 (O) · 1 × 4 = 4 (I)
- Clue 2 (Fractions of a number): "THE SNEAKY VILLAIN IS RIGHT CLAWED"3/6 of 38 = 19 (T) · 2/10 of 30 = 6 (I) · 2/6 of 96 = 32 (D) · 3/6 of 50 = 25 (R) · 2/4 of 60 = 30 (W) · 5/6 of 12 = 10 (H) · 3/6 of 56 = 28 (N) · 5/8 of 8 = 5 (C) · 3/5 of 15 = 9 (G) · 2/8 of 108 = 27 (A) · 4/10 of 35 = 14 (K) · 5/10 of 16 = 8 (Y) · 1/5 of 10 = 2 (S) · 2/4 of 74 = 37 (E) · 2/4 of 22 = 11 (L) · 5/10 of 66 = 33 (V)
- Clue 3 (Order of operations): "A BRIGHT FLASHLIGHT WILL STOP THEM"8 × 11 - 8 = 80 (A) · 39 + 8 × 4 = 71 (E) · 8 × 4 - 1 = 31 (R) · 10 × 5 - 6 = 44 (L) · 5 × 11 - 15 = 40 (P) · 53 + 3 × 4 = 65 (I) · 49 + 5 × 5 = 74 (G) · 13 + 2 × 4 = 21 (S) · 6 × 10 - 22 = 38 (O) · 9 × 11 - 20 = 79 (B) · 11 + 8 × 7 = 67 (H) · 15 + 2 × 6 = 27 (T) · 12 + 8 × 6 = 60 (M) · 19 + 7 × 5 = 54 (W) · 11 × 6 - 30 = 36 (F)
- Clue 4 (Rounding): "THEY LEFT BEHIND NEON GREEN FUR"Round 6,958 to the nearest thousand = 7000 (T) · Round 427 to the nearest ten = 430 (Y) · Round 107 to the nearest ten = 110 (F) · Round 1,141 to the nearest hundred = 1100 (R) · Round 2,919 to the nearest hundred = 2900 (U) · Round 282 to the nearest hundred = 300 (D) · Round 20 to the nearest ten = 20 (H) · Round 164 to the nearest hundred = 200 (I) · Round 228 to the nearest ten = 230 (G) · Round 1,754 to the nearest thousand = 2000 (E) · Round 4,523 to the nearest thousand = 5000 (N) · Round 370 to the nearest ten = 370 (O) · Round 3,148 to the nearest thousand = 3000 (B) · Round 862 to the nearest hundred = 900 (L)
- Clue 5 (Division facts (1-12)): surviving statement (box 9) → Shawn Shadow77 ÷ 7 = 11 · 7 ÷ 1 = 7 · 18 ÷ 3 = 6 · 36 ÷ 3 = 12 · 120 ÷ 12 = 10 · 20 ÷ 5 = 4 · 48 ÷ 6 = 8 · 33 ÷ 11 = 3 · 50 ÷ 10 = 5 · 5 ÷ 5 = 1 · 2 ÷ 1 = 2
About this mystery
- Grade level
- Grade 5 math
- Math topics
- Multiplication, Fractions of a number, Order of operations, Rounding, Division
- Reading level
- grades 5-6
- Theme
- The Midnight Monster Mystery — set in The Midnight Monster Academy
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects