🔎 Harry PotterGrade 3Reading: grades 3-4Place valueAdditionSubtractionRoundingMissing addends
The Hogwarts Snitch Snatcher
A golden snitch has been stolen right out of the trophy case at Hogwarts Castle! The Headmaster needs your help to find the culprit before the big Quidditch match starts. Use your wizarding mind and your math skills 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 Pet | Wand Hand | Hair Color | Boggart Fear |
|---|---|---|---|---|---|
| Seamus F | Wingardium Leviosa | Black Rat | Left-handed | Bright Red | Dementor |
| Susan B | Alohomora | Ginger Cat | Right-handed | Bushy Brown | Spider |
| Oliver W | Wingardium Leviosa | Ginger Cat | Left-handed | Messy Black | Dementor |
| Hannah A | Alohomora | Snowy Owl | Right-handed | Bright Red | Dementor |
| Parvati P | Expelliarmus | Ginger Cat | Right-handed | Bushy Brown | Dementor |
| Justin F | Expelliarmus | Toad | Left-handed | Messy Black | Howler |
| Harry P | Expecto Patronum | Baby Dragon | Left-handed | Messy Black | Spider |
| George W | Expelliarmus | Baby Dragon | Left-handed | Bright Red | Dementor |
| Luna L | Wingardium Leviosa | Toad | Right-handed | Bushy Brown | Dementor |
| Neville L | Expecto Patronum | Snowy Owl | Right-handed | Messy Black | Dementor |
| Draco M | Lumos | Toad | Left-handed | Messy Black | Howler |
| Cedric D | Wingardium Leviosa | Baby Dragon | Left-handed | Bright Red | Dementor |
| Cho C | Alohomora | Snowy Owl | Left-handed | Bright Red | Dementor |
| Percy W | Wingardium Leviosa | Baby Dragon | Right-handed | Bushy Brown | Dementor |
| Lavender B | Expecto Patronum | Toad | Right-handed | Messy Black | Spider |
| Padma P | Alohomora | Ginger Cat | Left-handed | Bright Red | Howler |
| Hermione G | Alohomora | Toad | Left-handed | Bright Red | Dementor |
| Zach Smith | Alohomora | Baby Dragon | Right-handed | Bushy Brown | Spider |
| Ron W | Expelliarmus | Black Rat | Left-handed | Bright Red | Dementor |
| Colin C | Expecto Patronum | Toad | Right-handed | Bushy Brown | Howler |
| Dean T | Expelliarmus | Snowy Owl | Left-handed | Bright Red | Spider |
Clue 1
Place value
We found a secret message written in glowing runes. To read the numbers, you must look at which place the digits are holding.
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
30
9000
8000
80
700
7000
7000
800
700
1000
3000
300
8000
5000
1000
300
T
30
9000
800
80
8000
800
60
7000
800
70
90
20
800
T
30
What is the value of the 3 in 4,437?T
What is the value of the 9 in 69,747?H
What is the value of the 8 in 846?A
What is the value of the 2 in 420?R
What is the value of the 8 in 1,689?V
What is the value of the 7 in 17,092?L
What is the value of the 3 in 380?O
What is the value of the 5 in 5,979?S
What is the value of the 9 in 8,296?K
What is the value of the 8 in 8,340?E
What is the value of the 6 in 969?B
What is the value of the 3 in 63,202?D
What is the value of the 1 in 81,833?N
What is the value of the 7 in 6,471?C
What is the value of the 7 in 796?I
0/15 letters found
Clue 2
Addition
The potion master is counting the floo powder jars left in the cabinet. Help him add them up to find 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
533
913
470
292
567
T
533
845
470
507
507
507
628
292
628
833
470
784
T
533
913
628
845
319
470
319
978
628
507
T
533
232 + 301 =T
455 + 390 =N
488 + 490 =C
309 + 524 =L
205 + 265 =E
491 + 293 =F
173 + 119 =W
318 + 189 =S
182 + 385 =I
627 + 286 =H
277 + 351 =A
167 + 152 =D
0/12 letters found
Clue 3
Subtraction
Some pages have been ripped out of a dusty library book. Subtract the remaining pages from the total to see what is missing.
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
212
745
517
484
848
533
533
641
202
T
212
T
212
896
202
715
517
692
730
715
T
212
848
641
692
517
274
517
715
T
212
848
202
223 - 11 =T
986 - 294 =D
278 - 4 =M
1104 - 359 =H
677 - 36 =A
914 - 184 =I
1124 - 276 =O
1182 - 286 =U
819 - 302 =E
620 - 87 =G
315 - 113 =R
502 - 18 =B
741 - 26 =N
0/13 letters found
Clue 4
Rounding
An enchanted crystal ball is glowing. It only shows numbers rounded to the nearest ten, so we must round them to read the map.
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
50
800
500
40
60
7000
2000
500
300
70
7000
A
50
40
500
3000
6000
20
600
60
2000
90
2000
7000
300
3000
A
50
20
6000
70
500
90
600
Round 52 to the nearest tenA
Round 89 to the nearest tenO
Round 7,085 to the nearest thousandH
Round 2,962 to the nearest thousandC
Round 59 to the nearest tenG
Round 6,037 to the nearest thousandL
Round 524 to the nearest hundredR
Round 40 to the nearest tenI
Round 66 to the nearest tenD
Round 551 to the nearest hundredN
Round 2,435 to the nearest thousandT
Round 338 to the nearest hundredE
Round 778 to the nearest hundredB
Round 24 to the nearest tenU
0/14 letters found
Clue 5
Missing addends — the last clue
To balance the golden scales, we need to find the missing ounces of moonstone. Solve the puzzle to unlock the final box.
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
6 + ___ = 9
9 + ___ = 19
8 + ___ = 9
5 + ___ = 11
8 + ___ = 15
1 + ___ = 12
10 + ___ = 18
1 + ___ = 5
8 + ___ = 20
3 + ___ = 12
5 + ___ = 10
Step 2 — cross out the sentence with each answer
1.The villain cast a locking charm, then fled on a nimbus broomstick.
2.The villain brewed a sleeping draught, then hid under an invisibility cloak.
3.The villain cast a locking charm, then dropped a handful of stinkbombs.
4.The villain sneaked past the sleepy portrait, then fled on a nimbus broomstick.
5.The villain cast a locking charm, then left a trail of glowing sparks.
6.The villain vanished the classroom door, then fled on a nimbus broomstick.
7.The villain sneaked past the sleepy portrait, then dropped a handful of stinkbombs.
8.The villain sneaked past the sleepy portrait, then scurried down the secret passage.
9.The villain brewed a sleeping draught, then dropped a handful of stinkbombs.
10.The villain shrank the trophy cabinet, then hid under an invisibility cloak.
11.The villain vanished the classroom door, then left a trail of glowing sparks.
12.The villain vanished the classroom door, then dropped a handful of stinkbombs.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Hogwarts Snitch Snatcher
Culprit: George W (Expelliarmus · Baby Dragon · Left-handed · Bright Red · Dementor)
- Clue 1 (Place value): "THE VILLAIN DOES NOT HAVE A BLACK RAT"What is the value of the 3 in 4,437? = 30 (T) · What is the value of the 9 in 69,747? = 9000 (H) · What is the value of the 8 in 846? = 800 (A) · What is the value of the 2 in 420? = 20 (R) · What is the value of the 8 in 1,689? = 80 (V) · What is the value of the 7 in 17,092? = 7000 (L) · What is the value of the 3 in 380? = 300 (O) · What is the value of the 5 in 5,979? = 5000 (S) · What is the value of the 9 in 8,296? = 90 (K) · What is the value of the 8 in 8,340? = 8000 (E) · What is the value of the 6 in 969? = 60 (B) · What is the value of the 3 in 63,202? = 3000 (D) · What is the value of the 1 in 81,833? = 1000 (N) · What is the value of the 7 in 6,471? = 70 (C) · What is the value of the 7 in 796? = 700 (I)
- Clue 2 (Addition): "THE WITNESS SAW A LEFT HANDED CAST"232 + 301 = 533 (T) · 455 + 390 = 845 (N) · 488 + 490 = 978 (C) · 309 + 524 = 833 (L) · 205 + 265 = 470 (E) · 491 + 293 = 784 (F) · 173 + 119 = 292 (W) · 318 + 189 = 507 (S) · 182 + 385 = 567 (I) · 627 + 286 = 913 (H) · 277 + 351 = 628 (A) · 167 + 152 = 319 (D)
- Clue 3 (Subtraction): "THE BOGGART TURNED INTO A DEMENTOR"223 - 11 = 212 (T) · 986 - 294 = 692 (D) · 278 - 4 = 274 (M) · 1104 - 359 = 745 (H) · 677 - 36 = 641 (A) · 914 - 184 = 730 (I) · 1124 - 276 = 848 (O) · 1182 - 286 = 896 (U) · 819 - 302 = 517 (E) · 620 - 87 = 533 (G) · 315 - 113 = 202 (R) · 502 - 18 = 484 (B) · 741 - 26 = 715 (N)
- Clue 4 (Rounding): "A BRIGHT RED HAIR CLUNG TO THE CAULDRON"Round 52 to the nearest ten = 50 (A) · Round 89 to the nearest ten = 90 (O) · Round 7,085 to the nearest thousand = 7000 (H) · Round 2,962 to the nearest thousand = 3000 (C) · Round 59 to the nearest ten = 60 (G) · Round 6,037 to the nearest thousand = 6000 (L) · Round 524 to the nearest hundred = 500 (R) · Round 40 to the nearest ten = 40 (I) · Round 66 to the nearest ten = 70 (D) · Round 551 to the nearest hundred = 600 (N) · Round 2,435 to the nearest thousand = 2000 (T) · Round 338 to the nearest hundred = 300 (E) · Round 778 to the nearest hundred = 800 (B) · Round 24 to the nearest ten = 20 (U)
- Clue 5 (Missing addends): surviving statement (box 2) → George W6 + ___ = 9 = 3 · 9 + ___ = 19 = 10 · 8 + ___ = 9 = 1 · 5 + ___ = 11 = 6 · 8 + ___ = 15 = 7 · 1 + ___ = 12 = 11 · 10 + ___ = 18 = 8 · 1 + ___ = 5 = 4 · 8 + ___ = 20 = 12 · 3 + ___ = 12 = 9 · 5 + ___ = 10 = 5
About this mystery
- Grade level
- Grade 3 math
- Math topics
- Place value, Addition, Subtraction, Rounding, Missing addends
- Reading level
- grades 3-4
- Theme
- The Hogwarts Snitch Snatcher — set in Hogwarts School of Magic
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects