🔎 Harry PotterGrade 6Reading: grades 5-6AdditionSubtractionMultiplicationPercentagesDivision
The Case of the Vanishing Spellbook
During the midnight hour at Aethelgard Academy, someone snuck into the Restricted Vault and snatched the Codex of Ancient Runes! Head Librarian Master Pendelton discovered the empty pedestal this morning. Magical clues and glowing residues remain across the grand hall.
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 Magic | Wand Core | Wand Grip | Hair Color | Counter Magic |
|---|---|---|---|---|---|
| Elian Vance | Levitation | Phoenix feather wand | Left handed grip | Jet black hair | Sunfire potion |
| Hazel Nightshade | Transmutation | Dragon heartstring wand | Left handed grip | Copper braid | Screaming mandrake |
| Zephyr Cross | Levitation | Basilisk scale wand | Left handed grip | Silver hair | Sunfire potion |
| Ignatius Ember | Ice summoning | Basilisk scale wand | Right handed grip | Copper braid | Cold iron chime |
| Gideon Frost | Levitation | Vampire fang wand | Left handed grip | Copper braid | Screaming mandrake |
| Flora Starling | Transmutation | Vampire fang wand | Left handed grip | Jet black hair | Screaming mandrake |
| Valerie Vesper | Transmutation | Basilisk scale wand | Left handed grip | Silver hair | Screaming mandrake |
| Penelope Pryce | Transmutation | Unicorn hair wand | Left handed grip | Copper braid | Screaming mandrake |
| Dorothea Blackwood | Levitation | Phoenix feather wand | Right handed grip | Copper braid | Screaming mandrake |
| Ulric Storm | Transmutation | Vampire fang wand | Left handed grip | Copper braid | Screaming mandrake |
| Kaelen Ash | Levitation | Phoenix feather wand | Right handed grip | Silver hair | Sunfire potion |
| Orion Vale | Ice summoning | Dragon heartstring wand | Right handed grip | Jet black hair | Cold iron chime |
| Alister Finch | Levitation | Dragon heartstring wand | Right handed grip | Copper braid | Cold iron chime |
| Beatrix Vane | Transmutation | Phoenix feather wand | Left handed grip | Copper braid | Cold iron chime |
| Wren Whisper | Fire casting | Basilisk scale wand | Left handed grip | Silver hair | Cold iron chime |
| Quentin Quill | Fire casting | Vampire fang wand | Left handed grip | Jet black hair | Screaming mandrake |
| Silas Grim | Ice summoning | Vampire fang wand | Left handed grip | Copper braid | Screaming mandrake |
| Nyssa Ravencroft | Levitation | Basilisk scale wand | Left handed grip | Copper braid | Cold iron chime |
| Magnus Drake | Levitation | Unicorn hair wand | Right handed grip | Copper braid | Cold iron chime |
| Thalia Hawthorn | Levitation | Basilisk scale wand | Right handed grip | Jet black hair | Screaming mandrake |
| Lyra Moon | Ice summoning | Vampire fang wand | Right handed grip | Jet black hair | Sunfire potion |
Clue 1
Addition
To trace the villain's initial steps, the apprentice detectives tally up all the glowing rune tracks found near the entrance.
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
2856
4583
7188
8148
6891
4290
4290
3804
6891
9665
7305
3980
7188
4236
9665
3980
T
2856
5523
4236
7188
5523
9665
6891
2901
3980
3597
9665
4583
3804
6891
3597
1980 + 876 =T
3236 + 2287 =U
3954 + 3234 =E
3006 + 4299 =D
2446 + 1844 =L
4441 + 2450 =I
2784 + 1452 =S
1736 + 2244 =O
2307 + 1290 =R
1686 + 1215 =C
2688 + 1895 =H
1573 + 2231 =A
6398 + 3267 =N
3633 + 4515 =V
0/14 letters found
Clue 2
Subtraction
Comparing the total number of magic vials before and after the theft reveals how many potions were taken during the escape.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
L
4836
6390
2308
6919
3137
4609
4391
7791
6390
7791
5388
4391
8374
6053
5473
6487
7791
6416
6390
6053
6720
4391
6919
3137
6390
6053
1676
1998
6720
L
4836
L
4836
9511 - 4675 =L
11670 - 4751 =T
6808 - 3671 =H
8856 - 3383 =M
10832 - 4112 =O
3401 - 1725 =C
6816 - 4818 =R
8353 - 1963 =E
6615 - 4307 =F
8598 - 2111 =U
10070 - 3654 =G
9609 - 3556 =S
5818 - 1209 =A
8381 - 2993 =I
5355 - 964 =N
9727 - 1936 =D
10599 - 2225 =K
0/17 letters found
Clue 3
Multiplication facts (1-12)
The mystery solver counts identical bookshelf rows and multiplies them to estimate how many scrolls were disrupted.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
C
50
3
45
22
12
90
45
72
25
21
77
12
36
C
50
14
72
12
54
90
45
66
54
12
45
25
14
12
35
72
10 × 5 =C
5 × 5 =D
3 × 7 =B
11 × 2 =T
1 × 12 =A
9 × 10 =I
6 × 11 =G
12 × 3 =S
7 × 11 =Y
1 × 3 =O
6 × 9 =M
9 × 5 =N
2 × 7 =R
7 × 5 =K
9 × 8 =E
0/15 letters found
Clue 4
Percentages
A diagnostic charm measures what percentage of the vault's protective ward was drained by the intruder's wand.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
F
9
40
41
26
34
14
40
23
23
37
36
38
12
24
36
12
8
8
38
37
14
36
24
6
37
22
14
37
26
37
60% of 15 =F
10% of 240 =I
50% of 72 =R
50% of 52 =N
25% of 24 =M
10% of 230 =P
5% of 240 =A
20% of 70 =C
50% of 76 =H
50% of 16 =T
20% of 185 =E
10% of 340 =D
20% of 205 =U
40% of 100 =O
20% of 110 =S
0/15 letters found
Clue 5
Division facts (1-12) — the last clue
The lead detective divides the total count of scattered silver scales equally among the suspect tables to narrow the search.
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
9 ÷ 3 = ?
22 ÷ 11 = ?
72 ÷ 12 = ?
25 ÷ 5 = ?
33 ÷ 3 = ?
96 ÷ 12 = ?
99 ÷ 11 = ?
48 ÷ 12 = ?
60 ÷ 5 = ?
100 ÷ 10 = ?
35 ÷ 5 = ?
Step 2 — cross out the sentence with each answer
1.The villain froze the library doors shut, then cast dark hexes with a vampire wand.
2.The villain turned brass doorknobs into frogs, then cast dark hexes with a vampire wand.
3.The villain lifted heavy stone statues, then cast dark hexes with a vampire wand.
4.The villain cast a blazing fire spell, then channeled power with a phoenix wand.
5.The villain cast a blazing fire spell, then waved a quiet unicorn wand.
6.The villain turned brass doorknobs into frogs, then blasted sparks with a dragon wand.
7.The villain turned brass doorknobs into frogs, then waved a quiet unicorn wand.
8.The villain cast a blazing fire spell, then blasted sparks with a dragon wand.
9.The villain created tricky illusion mirrors, then waved a quiet unicorn wand.
10.The villain lifted heavy stone statues, then waved a quiet unicorn wand.
11.The villain froze the library doors shut, then channeled power with a phoenix wand.
12.The villain turned brass doorknobs into frogs, then stole magic with a basilisk wand.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Case of the Vanishing Spellbook
Culprit: Silas Grim (Ice summoning · Vampire fang wand · Left handed grip · Copper braid · Screaming mandrake)
- Clue 1 (Addition): "THE VILLAIN DOES NOT USE UNICORN HAIR"1980 + 876 = 2856 (T) · 3236 + 2287 = 5523 (U) · 3954 + 3234 = 7188 (E) · 3006 + 4299 = 7305 (D) · 2446 + 1844 = 4290 (L) · 4441 + 2450 = 6891 (I) · 2784 + 1452 = 4236 (S) · 1736 + 2244 = 3980 (O) · 2307 + 1290 = 3597 (R) · 1686 + 1215 = 2901 (C) · 2688 + 1895 = 4583 (H) · 1573 + 2231 = 3804 (A) · 6398 + 3267 = 9665 (N) · 3633 + 4515 = 8148 (V)
- Clue 2 (Subtraction): "LEFT HANDED INK SMUDGES ON THE SCROLL"9511 - 4675 = 4836 (L) · 11670 - 4751 = 6919 (T) · 6808 - 3671 = 3137 (H) · 8856 - 3383 = 5473 (M) · 10832 - 4112 = 6720 (O) · 3401 - 1725 = 1676 (C) · 6816 - 4818 = 1998 (R) · 8353 - 1963 = 6390 (E) · 6615 - 4307 = 2308 (F) · 8598 - 2111 = 6487 (U) · 10070 - 3654 = 6416 (G) · 9609 - 3556 = 6053 (S) · 5818 - 1209 = 4609 (A) · 8381 - 2993 = 5388 (I) · 5355 - 964 = 4391 (N) · 9727 - 1936 = 7791 (D) · 10599 - 2225 = 8374 (K)
- Clue 3 (Multiplication facts (1-12)): "CONTAINED BY A SCREAMING MANDRAKE"10 × 5 = 50 (C) · 5 × 5 = 25 (D) · 3 × 7 = 21 (B) · 11 × 2 = 22 (T) · 1 × 12 = 12 (A) · 9 × 10 = 90 (I) · 6 × 11 = 66 (G) · 12 × 3 = 36 (S) · 7 × 11 = 77 (Y) · 1 × 3 = 3 (O) · 6 × 9 = 54 (M) · 9 × 5 = 45 (N) · 2 × 7 = 14 (R) · 7 × 5 = 35 (K) · 9 × 8 = 72 (E)
- Clue 4 (Percentages): "FOUND COPPER HAIR AT THE CRIME SCENE"60% of 15 = 9 (F) · 10% of 240 = 24 (I) · 50% of 72 = 36 (R) · 50% of 52 = 26 (N) · 25% of 24 = 6 (M) · 10% of 230 = 23 (P) · 5% of 240 = 12 (A) · 20% of 70 = 14 (C) · 50% of 76 = 38 (H) · 50% of 16 = 8 (T) · 20% of 185 = 37 (E) · 10% of 340 = 34 (D) · 20% of 205 = 41 (U) · 40% of 100 = 40 (O) · 20% of 110 = 22 (S)
- Clue 5 (Division facts (1-12)): surviving statement (box 1) → Silas Grim9 ÷ 3 = 3 · 22 ÷ 11 = 2 · 72 ÷ 12 = 6 · 25 ÷ 5 = 5 · 33 ÷ 3 = 11 · 96 ÷ 12 = 8 · 99 ÷ 11 = 9 · 48 ÷ 12 = 4 · 60 ÷ 5 = 12 · 100 ÷ 10 = 10 · 35 ÷ 5 = 7
About this mystery
- Grade level
- Grade 6 math
- Math topics
- Addition, Subtraction, Multiplication, Percentages, Division
- Reading level
- grades 5-6
- Theme
- The Case of the Vanishing Spellbook — set in Aethelgard Academy of Arcane Arts
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects