🔎 Harry potterGrade 4Reading: grades 3-4RoundingAdditionSubtractionMultiplicationDivision
The Case of the Missing Golden Snitch
Someone has snuck into the Hogwarts Trophy Room and snatched the Golden Snitch right before the big game! The Quidditch Captain is frantic. A trail of magical sparks leads us to twenty-four student suspects. We must use magic and math to crack the case!
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 | Favorite Spell | Magical Gear | Wand Hand | Hair Color | Biggest Fear |
|---|---|---|---|---|---|
| Cassius | Levicorpus | Remembrall | Right-handed caster | Messy black hair | Afraid of heights |
| Rowena | Expelliarmus | Invisibility Cloak | Left-handed caster | Bright red hair | Scared of spiders |
| Barnaby | Levicorpus | Invisibility Cloak | Left-handed caster | Bright red hair | Scared of spiders |
| Amara | Petrificus | Omnioculars | Right-handed caster | Messy black hair | Scared of spiders |
| Helena | Lumos | Marauders Map | Right-handed caster | Messy black hair | Scared of spiders |
| Fiona | Lumos | Marauders Map | Right-handed caster | Messy black hair | Allergic to floo powder |
| Evelyn | Levicorpus | Sneakoscope | Left-handed caster | Bushy brown hair | Allergic to floo powder |
| Wilfred | Expelliarmus | Omnioculars | Right-handed caster | Bright red hair | Allergic to floo powder |
| Millicent | Alohomora | Omnioculars | Right-handed caster | Bushy brown hair | Scared of spiders |
| Quentin | Alohomora | Omnioculars | Right-handed caster | Bright red hair | Afraid of heights |
| Xavier | Petrificus | Invisibility Cloak | Right-handed caster | Bushy brown hair | Scared of spiders |
| Phineas | Expelliarmus | Sneakoscope | Right-handed caster | Messy black hair | Allergic to floo powder |
| Silas | Alohomora | Omnioculars | Right-handed caster | Messy black hair | Scared of spiders |
| Julian | Levicorpus | Sneakoscope | Left-handed caster | Bright red hair | Scared of spiders |
| Uriah | Petrificus | Invisibility Cloak | Right-handed caster | Messy black hair | Afraid of heights |
| Tabitha | Lumos | Remembrall | Right-handed caster | Bright red hair | Scared of spiders |
| Ignatius | Expelliarmus | Sneakoscope | Right-handed caster | Messy black hair | Scared of spiders |
| Garrick | Expelliarmus | Marauders Map | Right-handed caster | Bright red hair | Allergic to floo powder |
| Valerie | Expelliarmus | Invisibility Cloak | Left-handed caster | Messy black hair | Scared of spiders |
| Zacharias | Expelliarmus | Remembrall | Right-handed caster | Messy black hair | Scared of spiders |
| Orion | Levicorpus | Invisibility Cloak | Right-handed caster | Messy black hair | Scared of spiders |
Clue 1
Rounding
We check the magic Sneakoscope on the desk. Its spinning dial only shows numbers rounded to the nearest ten. Let us estimate the power level to unlock the 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.
T
1100
30
900
5000
9000
900
90
2300
370
500
3700
3000
90
230
70
70
130
900
5000
9000
130
T
1100
130
500
9000
130
200
9000
3700
130
50
700
7000
90
230
5000
Round 1,127 to the nearest hundredT
Round 2,951 to the nearest thousandZ
Round 69 to the nearest tenD
Round 939 to the nearest hundredE
Round 27 to the nearest tenH
Round 4,536 to the nearest thousandS
Round 6,913 to the nearest thousandL
Round 3,673 to the nearest hundredI
Round 233 to the nearest tenR
Round 369 to the nearest tenY
Round 8,542 to the nearest thousandN
Round 740 to the nearest hundredU
Round 178 to the nearest hundredM
Round 460 to the nearest hundredW
Round 2,284 to the nearest hundredK
Round 91 to the nearest tenA
Round 54 to the nearest tenC
Round 131 to the nearest tenO
0/18 letters found
Clue 2
Addition
To open the locked potion cabinet, we need to count the total number of ingredients. Let us add up the newt eyes and beetle eyes to get the answer.
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
6757
2749
3592
7699
5692
7657
T
6757
7462
8439
2480
7657
7168
5692
2830
5463
7657
8741
3830
3592
4379
8741
2830
2734
7346
T
6757
2749
3592
2830
7462
2480
2749
T
6757
2749
5692
8439
7834
3889 + 2868 =T
965 + 1784 =H
3676 + 4763 =N
4590 + 2578 =P
1164 + 1570 =O
1837 + 1755 =E
858 + 1622 =G
1778 + 2601 =W
3854 + 3980 =D
1713 + 2117 =L
4639 + 3060 =C
4566 + 2896 =I
2404 + 3059 =K
4347 + 3310 =S
4992 + 2354 =M
5951 + 2790 =F
1067 + 1763 =R
3061 + 2631 =A
0/18 letters found
Clue 3
Subtraction
We had a large bag of floo powder, but some was used to travel between classrooms. Let us subtract the used powder to see how much magical fuel is left.
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
8199
1349
5835
8698
1145
3707
4984
5369
7582
5369
4984
1160
4984
8698
4984
8010
5576
5369
2007
5353
4984
T
8199
1145
1160
8010
8275
5113
1145
7582
5835
5369
11087 - 2888 =T
8714 - 1132 =D
9236 - 3660 =F
7143 - 3436 =Z
8499 - 224 =S
2153 - 804 =H
6477 - 1364 =P
4227 - 3067 =N
3252 - 1245 =O
9845 - 4476 =R
2356 - 1211 =I
9049 - 1039 =Y
9070 - 4086 =A
6100 - 747 =M
13685 - 4987 =W
9072 - 3237 =E
0/16 letters found
Clue 4
Multiplication facts (1-12)
The herbology greenhouse has several neat rows of mandrakes. Let us multiply the rows by the number of plants in each row to find the total.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
W
96
6
25
90
33
2
1
81
6
49
49
144
72
18
108
77
15
28
108
27
10
90
2
120
28
6
49
28
6
18
25
8 × 12 =W
1 × 2 =N
9 × 8 =B
6 × 3 =L
9 × 9 =M
5 × 3 =K
3 × 9 =I
9 × 12 =A
5 × 5 =F
1 × 1 =D
3 × 11 =U
10 × 9 =O
10 × 12 =T
11 × 7 =C
7 × 7 =S
12 × 12 =Y
2 × 3 =E
7 × 4 =H
2 × 5 =R
0/19 letters found
Clue 5
Division facts (1-12) — the last clue
We found a box of chocolate frogs to share among the young wizards. Let us divide the treats equally so everyone gets an even share.
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
24 ÷ 8 = ?
72 ÷ 12 = ?
15 ÷ 3 = ?
8 ÷ 4 = ?
66 ÷ 6 = ?
44 ÷ 11 = ?
120 ÷ 10 = ?
54 ÷ 6 = ?
3 ÷ 3 = ?
10 ÷ 1 = ?
64 ÷ 8 = ?
Step 2 — cross out the sentence with each answer
1.The villain uses petrificus to freeze the guard portrait, then slips away under an invisibility cloak.
2.The villain uses petrificus to freeze the guard portrait, then uses the marauders map to dodge the prefects.
3.The villain whispers lumos to light the dark room, then uses the marauders map to dodge the prefects.
4.The villain uses petrificus to freeze the guard portrait, then checks their remembrall to recall the way out.
5.The villain casts levicorpus to float the trophy, then slips away under an invisibility cloak.
6.The villain casts expelliarmus to disarm the lock, then hides the prize when the sneakoscope spins.
7.The villain casts expelliarmus to disarm the lock, then checks their remembrall to recall the way out.
8.The villain uses petrificus to freeze the guard portrait, then peers through the omnioculars to spot guards.
9.The villain whispers lumos to light the dark room, then slips away under an invisibility cloak.
10.The villain whispers lumos to light the dark room, then checks their remembrall to recall the way out.
11.The villain casts expelliarmus to disarm the lock, then peers through the omnioculars to spot guards.
12.The villain casts levicorpus to float the trophy, then uses the marauders map to dodge the prefects.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Case of the Missing Golden Snitch
Culprit: Zacharias (Expelliarmus · Remembrall · Right-handed caster · Messy black hair · Scared of spiders)
- Clue 1 (Rounding): "THE SNEAKY WIZARD DOES NOT OWN OMNIOCULARS"Round 1,127 to the nearest hundred = 1100 (T) · Round 2,951 to the nearest thousand = 3000 (Z) · Round 69 to the nearest ten = 70 (D) · Round 939 to the nearest hundred = 900 (E) · Round 27 to the nearest ten = 30 (H) · Round 4,536 to the nearest thousand = 5000 (S) · Round 6,913 to the nearest thousand = 7000 (L) · Round 3,673 to the nearest hundred = 3700 (I) · Round 233 to the nearest ten = 230 (R) · Round 369 to the nearest ten = 370 (Y) · Round 8,542 to the nearest thousand = 9000 (N) · Round 740 to the nearest hundred = 700 (U) · Round 178 to the nearest hundred = 200 (M) · Round 460 to the nearest hundred = 500 (W) · Round 2,284 to the nearest hundred = 2300 (K) · Round 91 to the nearest ten = 90 (A) · Round 54 to the nearest ten = 50 (C) · Round 131 to the nearest ten = 130 (O)
- Clue 2 (Addition): "THE CASTING SPARKS FLEW FROM THE RIGHT HAND"3889 + 2868 = 6757 (T) · 965 + 1784 = 2749 (H) · 3676 + 4763 = 8439 (N) · 4590 + 2578 = 7168 (P) · 1164 + 1570 = 2734 (O) · 1837 + 1755 = 3592 (E) · 858 + 1622 = 2480 (G) · 1778 + 2601 = 4379 (W) · 3854 + 3980 = 7834 (D) · 1713 + 2117 = 3830 (L) · 4639 + 3060 = 7699 (C) · 4566 + 2896 = 7462 (I) · 2404 + 3059 = 5463 (K) · 4347 + 3310 = 7657 (S) · 4992 + 2354 = 7346 (M) · 5951 + 2790 = 8741 (F) · 1067 + 1763 = 2830 (R) · 3061 + 2631 = 5692 (A)
- Clue 3 (Subtraction): "THE WIZARD RAN AWAY FROM A TINY SPIDER"11087 - 2888 = 8199 (T) · 8714 - 1132 = 7582 (D) · 9236 - 3660 = 5576 (F) · 7143 - 3436 = 3707 (Z) · 8499 - 224 = 8275 (S) · 2153 - 804 = 1349 (H) · 6477 - 1364 = 5113 (P) · 4227 - 3067 = 1160 (N) · 3252 - 1245 = 2007 (O) · 9845 - 4476 = 5369 (R) · 2356 - 1211 = 1145 (I) · 9049 - 1039 = 8010 (Y) · 9070 - 4086 = 4984 (A) · 6100 - 747 = 5353 (M) · 13685 - 4987 = 8698 (W) · 9072 - 3237 = 5835 (E)
- Clue 4 (Multiplication facts (1-12)): "WE FOUND MESSY BLACK HAIR ON THE SHELF"8 × 12 = 96 (W) · 1 × 2 = 2 (N) · 9 × 8 = 72 (B) · 6 × 3 = 18 (L) · 9 × 9 = 81 (M) · 5 × 3 = 15 (K) · 3 × 9 = 27 (I) · 9 × 12 = 108 (A) · 5 × 5 = 25 (F) · 1 × 1 = 1 (D) · 3 × 11 = 33 (U) · 10 × 9 = 90 (O) · 10 × 12 = 120 (T) · 11 × 7 = 77 (C) · 7 × 7 = 49 (S) · 12 × 12 = 144 (Y) · 2 × 3 = 6 (E) · 7 × 4 = 28 (H) · 2 × 5 = 10 (R)
- Clue 5 (Division facts (1-12)): surviving statement (box 7) → Zacharias24 ÷ 8 = 3 · 72 ÷ 12 = 6 · 15 ÷ 3 = 5 · 8 ÷ 4 = 2 · 66 ÷ 6 = 11 · 44 ÷ 11 = 4 · 120 ÷ 10 = 12 · 54 ÷ 6 = 9 · 3 ÷ 3 = 1 · 10 ÷ 1 = 10 · 64 ÷ 8 = 8
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Rounding, Addition, Subtraction, Multiplication, Division
- Reading level
- grades 3-4
- Theme
- The Case of the Missing Golden Snitch — set in The Hogwarts Trophy Room
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects