🔎 Harry potterGrade 5Reading: grades 5-6Fractions of a numberOrder of operationsMultiplicationRoundingDivision
The Hogwarts Potion Heist
A rare batch of Felix Felicis has been stolen from the potions dungeon! Professor Snape is furious. A sneaky student or rogue wizard snuck in during dinner. Use your arithmancy skills to analyze the magical evidence and find the culprit before they drink the liquid luck!
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 | Signature Spell | Magical Item | Wand Hand | House Scarf | Herbology Allergy |
|---|---|---|---|---|---|
| Dean Thomas | Lumos | Sneakoscope | Left-handed | Green Scarf | Gillyweed |
| Theodore Nott | Alohomora | Invisibility Cloak | Left-handed | Red Scarf | Mandrakes |
| Susan Bones | Lumos | Remembrall | Right-handed | Green Scarf | Gillyweed |
| Luna Lovegood | Stupefy | Sneakoscope | Right-handed | Red Scarf | Gillyweed |
| Cedric Diggory | Incendio | Marauders Map | Right-handed | Red Scarf | Devils Snare |
| Blaise Zabini | Expelliarmus | Invisibility Cloak | Right-handed | Green Scarf | Devils Snare |
| Hannah Abbott | Incendio | Invisibility Cloak | Right-handed | Green Scarf | Gillyweed |
| Cho Chang | Stupefy | Sneakoscope | Right-handed | Blue Scarf | Gillyweed |
| Justin FinchFletchley | Alohomora | Invisibility Cloak | Right-handed | Blue Scarf | Mandrakes |
| Percy Weasley | Lumos | Remembrall | Left-handed | Red Scarf | Mandrakes |
| Hermione Granger | Lumos | Invisibility Cloak | Left-handed | Red Scarf | Mandrakes |
| Oliver Wood | Stupefy | Golden Snitch | Left-handed | Red Scarf | Gillyweed |
| Ernie Macmillan | Incendio | Marauders Map | Left-handed | Green Scarf | Gillyweed |
| Ron Weasley | Lumos | Marauders Map | Left-handed | Red Scarf | Mandrakes |
| Neville Longbottom | Incendio | Golden Snitch | Left-handed | Red Scarf | Mandrakes |
| Harry Potter | Incendio | Sneakoscope | Left-handed | Green Scarf | Mandrakes |
| Padma Patil | Incendio | Sneakoscope | Left-handed | Red Scarf | Devils Snare |
| Fred Weasley | Alohomora | Remembrall | Right-handed | Red Scarf | Gillyweed |
| Draco Malfoy | Alohomora | Remembrall | Right-handed | Blue Scarf | Gillyweed |
| Lavender Brown | Lumos | Invisibility Cloak | Left-handed | Red Scarf | Devils Snare |
| George Weasley | Lumos | Sneakoscope | Right-handed | Red Scarf | Mandrakes |
Clue 1
Fractions of a number
To crack the protective shield on the potion cabinet, we must calculate a fraction of the total runes carved on the stone door.
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
7
22
38
39
4
28
26
32
T
19
11
23
22
35
30
23
T
19
23
31
30
5
17
23
4
11
22
30
35
30
32
T
19
38
7
2/10 of 95 =T
1/8 of 136 =G
3/6 of 62 =W
1/2 of 44 =E
2/4 of 64 =I
2/8 of 156 =U
2/10 of 55 =D
2/6 of 15 =A
1/3 of 78 =R
2/10 of 140 =P
1/4 of 92 =O
1/2 of 60 =N
1/2 of 14 =H
1/5 of 175 =S
2/3 of 6 =L
2/8 of 152 =C
0/16 letters found
Clue 2
Order of operations
A messy chalkboard contains a multi-step spell formula. We must solve it in the correct order to reveal the secret lock combination.
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
65
23
67
15
54
75
60
24
75
58
15
54
62
62
35
9
60
12
67
60
76
75
T
65
23
67
46
67
26
T
65
62
24
60
67
38 + 3 × 9 =T
11 + 4 × 6 =M
9 × 8 - 14 =K
8 × 6 - 2 =L
8 + 2 × 2 =G
6 + 3 × 3 =W
12 × 7 - 22 =S
55 + 5 × 4 =N
12 + 2 × 7 =F
12 × 3 - 13 =H
3 + 2 × 3 =U
4 × 7 - 4 =I
42 + 2 × 9 =D
10 × 10 - 24 =O
12 × 7 - 17 =E
6 × 11 - 12 =A
0/16 letters found
Clue 3
Multiplication facts (1-12)
The thief stole several boxes of ingredients, each containing many rows of vials. We must multiply the rows to count the missing stash.
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
49
3
12
132
11
56
3
50
49
12
35
18
81
22
35
9
81
6
12
132
54
9
12
36
32
18
11
54
35
18
21
12
35
81
3
50
4 × 11 =T
7 × 7 =H
3 × 7 =D
6 × 3 =N
3 × 1 =E
3 × 4 =R
9 × 6 =M
11 × 12 =O
3 × 2 =F
11 × 2 =B
8 × 7 =U
1 × 11 =G
5 × 7 =A
1 × 9 =C
4 × 8 =I
9 × 4 =Y
10 × 5 =S
9 × 9 =K
0/18 letters found
Clue 4
Rounding
The magical scales in the lab only show weight rounded to the nearest ten. We must estimate the mass of the spilled powder.
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
20
3700
1700
7000
2000
130
70
500
2300
2000
1700
7000
130
70
90
2000
1700
2300
110
7000
1700
7000
50
7000
2300
T
20
3000
7000
3700
430
370
130
Round 19 to the nearest tenT
Round 46 to the nearest tenL
Round 1,628 to the nearest thousandA
Round 130 to the nearest tenD
Round 369 to the nearest tenN
Round 94 to the nearest tenC
Round 3,163 to the nearest thousandB
Round 457 to the nearest hundredO
Round 428 to the nearest tenI
Round 69 to the nearest tenS
Round 3,739 to the nearest hundredH
Round 2,333 to the nearest hundredF
Round 109 to the nearest tenW
Round 6,540 to the nearest thousandE
Round 1,729 to the nearest hundredR
0/15 letters found
Clue 5
Division facts (1-12) — the last clue
To share the counter-curse equally among the affected students, we must divide the healing potion drops into equal beakers.
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
64 ÷ 8 = ?
25 ÷ 5 = ?
10 ÷ 1 = ?
3 ÷ 3 = ?
18 ÷ 2 = ?
55 ÷ 5 = ?
28 ÷ 4 = ?
10 ÷ 5 = ?
60 ÷ 10 = ?
44 ÷ 11 = ?
84 ÷ 7 = ?
Step 2 — cross out the sentence with each answer
1.The villain whispers alohomora to open the cabinet, then silences a spinning sneakoscope.
2.The villain whispers alohomora to open the cabinet, then chases a fluttering golden snitch.
3.The villain conjures lumos to light the dark shelf, then checks a dusty marauders map.
4.The villain casts expelliarmus to disarm the lock, then drops a glowing red remembrall.
5.The villain conjures lumos to light the dark shelf, then slips away under an invisibility cloak.
6.The villain sparks incendio to melt the seal, then silences a spinning sneakoscope.
7.The villain shoots a stupefy spell at the desk, then silences a spinning sneakoscope.
8.The villain whispers alohomora to open the cabinet, then slips away under an invisibility cloak.
9.The villain conjures lumos to light the dark shelf, then silences a spinning sneakoscope.
10.The villain conjures lumos to light the dark shelf, then drops a glowing red remembrall.
11.The villain sparks incendio to melt the seal, then chases a fluttering golden snitch.
12.The villain casts expelliarmus to disarm the lock, then silences a spinning sneakoscope.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Hogwarts Potion Heist
Culprit: Ron Weasley (Lumos · Marauders Map · Left-handed · Red Scarf · Mandrakes)
- Clue 1 (Fractions of a number): "THE CULPRIT DOES NOT OWN A GOLDEN SNITCH"2/10 of 95 = 19 (T) · 1/8 of 136 = 17 (G) · 3/6 of 62 = 31 (W) · 1/2 of 44 = 22 (E) · 2/4 of 64 = 32 (I) · 2/8 of 156 = 39 (U) · 2/10 of 55 = 11 (D) · 2/6 of 15 = 5 (A) · 1/3 of 78 = 26 (R) · 2/10 of 140 = 28 (P) · 1/4 of 92 = 23 (O) · 1/2 of 60 = 30 (N) · 1/2 of 14 = 7 (H) · 1/5 of 175 = 35 (S) · 2/3 of 6 = 4 (L) · 2/8 of 152 = 38 (C)
- Clue 2 (Order of operations): "THE WAND INK WAS SMUDGED ON THE LEFT SIDE"38 + 3 × 9 = 65 (T) · 11 + 4 × 6 = 35 (M) · 9 × 8 - 14 = 58 (K) · 8 × 6 - 2 = 46 (L) · 8 + 2 × 2 = 12 (G) · 6 + 3 × 3 = 15 (W) · 12 × 7 - 22 = 62 (S) · 55 + 5 × 4 = 75 (N) · 12 + 2 × 7 = 26 (F) · 12 × 3 - 13 = 23 (H) · 3 + 2 × 3 = 9 (U) · 4 × 7 - 4 = 24 (I) · 42 + 2 × 9 = 60 (D) · 10 × 10 - 24 = 76 (O) · 12 × 7 - 17 = 67 (E) · 6 × 11 - 12 = 54 (A)
- Clue 3 (Multiplication facts (1-12)): "THE ROGUE SHRANK BACK FROM CRYING MANDRAKES"4 × 11 = 44 (T) · 7 × 7 = 49 (H) · 3 × 7 = 21 (D) · 6 × 3 = 18 (N) · 3 × 1 = 3 (E) · 3 × 4 = 12 (R) · 9 × 6 = 54 (M) · 11 × 12 = 132 (O) · 3 × 2 = 6 (F) · 11 × 2 = 22 (B) · 8 × 7 = 56 (U) · 1 × 11 = 11 (G) · 5 × 7 = 35 (A) · 1 × 9 = 9 (C) · 4 × 8 = 32 (I) · 9 × 4 = 36 (Y) · 10 × 5 = 50 (S) · 9 × 9 = 81 (K)
- Clue 4 (Rounding): "THREADS OF A RED SCARF WERE LEFT BEHIND"Round 19 to the nearest ten = 20 (T) · Round 46 to the nearest ten = 50 (L) · Round 1,628 to the nearest thousand = 2000 (A) · Round 130 to the nearest ten = 130 (D) · Round 369 to the nearest ten = 370 (N) · Round 94 to the nearest ten = 90 (C) · Round 3,163 to the nearest thousand = 3000 (B) · Round 457 to the nearest hundred = 500 (O) · Round 428 to the nearest ten = 430 (I) · Round 69 to the nearest ten = 70 (S) · Round 3,739 to the nearest hundred = 3700 (H) · Round 2,333 to the nearest hundred = 2300 (F) · Round 109 to the nearest ten = 110 (W) · Round 6,540 to the nearest thousand = 7000 (E) · Round 1,729 to the nearest hundred = 1700 (R)
- Clue 5 (Division facts (1-12)): surviving statement (box 3) → Ron Weasley64 ÷ 8 = 8 · 25 ÷ 5 = 5 · 10 ÷ 1 = 10 · 3 ÷ 3 = 1 · 18 ÷ 2 = 9 · 55 ÷ 5 = 11 · 28 ÷ 4 = 7 · 10 ÷ 5 = 2 · 60 ÷ 10 = 6 · 44 ÷ 11 = 4 · 84 ÷ 7 = 12
About this mystery
- Grade level
- Grade 5 math
- Math topics
- Fractions of a number, Order of operations, Multiplication, Rounding, Division
- Reading level
- grades 5-6
- Theme
- The Hogwarts Potion Heist — set in the dark corridors and classrooms of Hogwarts Castle
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects