🔎 Harry PotterGrade 3Reading: grades 3-4Place valueAdditionSubtractionRoundingDivision
The Mystery of the Missing Remembrall
An anxious first-year has lost their precious Remembrall! It was swiped right off their desk in the Great Hall. You must search Hogwarts to find the mischievous student who took it.
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 | Spell Cast | Escape Method | Wand Hand | Hair Color | Greatest Fear |
|---|---|---|---|---|---|
| Elara Starling | casting a levitation charm | wearing an invisibility cloak | holding wand in right hand | bright red hair | fearing a roaring lion |
| Milo Broadmoor | using a memory spell | flying on a broom | holding wand in right hand | pale blonde hair | fearing a roaring lion |
| Silas Merrythought | casting a levitation charm | sneaking through secret passages | holding wand in right hand | dark black hair | disliking cold water |
| Alby Thorne | summoning a patronus | wearing an invisibility cloak | holding wand in left hand | dark black hair | disliking cold water |
| Cora Pendelton | using a memory spell | wearing an invisibility cloak | holding wand in left hand | pale blonde hair | sneezing around cat hair |
| Prudence Vance | casting a levitation charm | sneaking through secret passages | holding wand in left hand | pale blonde hair | disliking cold water |
| Rufus Sterling | brewing a shrinking potion | flying on a broom | holding wand in right hand | pale blonde hair | disliking cold water |
| Barnaby Vance | casting a levitation charm | transforming into a cat | holding wand in left hand | pale blonde hair | sneezing around cat hair |
| Jasper Swift | summoning a patronus | decoding ancient runes | holding wand in right hand | dark black hair | disliking cold water |
| Lysander Rook | brewing a shrinking potion | flying on a broom | holding wand in right hand | bright red hair | disliking cold water |
| Nesta Quirke | casting a levitation charm | sneaking through secret passages | holding wand in left hand | dark black hair | disliking cold water |
| Orion Blackwood | casting a levitation charm | wearing an invisibility cloak | holding wand in left hand | dark black hair | disliking cold water |
| Darius Thorne | casting a levitation charm | transforming into a cat | holding wand in left hand | dark black hair | disliking cold water |
| Kendra Finch | brewing a shrinking potion | transforming into a cat | holding wand in right hand | dark black hair | disliking cold water |
| Felix Fawley | conjuring magical sparks | wearing an invisibility cloak | holding wand in right hand | pale blonde hair | sneezing around cat hair |
| Hesper Gamp | brewing a shrinking potion | decoding ancient runes | holding wand in right hand | dark black hair | sneezing around cat hair |
| Wilfred Elphick | brewing a shrinking potion | wearing an invisibility cloak | holding wand in left hand | pale blonde hair | disliking cold water |
| Uriah Gudgeon | casting a levitation charm | decoding ancient runes | holding wand in right hand | bright red hair | fearing a roaring lion |
| Tabitha Tuft | casting a levitation charm | flying on a broom | holding wand in left hand | dark black hair | fearing a roaring lion |
| Valerie Vane | using a memory spell | decoding ancient runes | holding wand in right hand | dark black hair | disliking cold water |
| Quentin Trimble | conjuring magical sparks | wearing an invisibility cloak | holding wand in left hand | dark black hair | disliking cold water |
Clue 1
Place value
You find a mysterious safe locked with a code. The digit in the tens place reveals a hidden scroll. It tells us about the thief.
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
6000
10
80
8000
90
500
500
4000
90
20
400
4000
20
20
300
T
6000
T
6000
900
4000
20
3000
30
300
900
60
90
20
T
6000
300
4000
400
4000
T
6000
What is the value of the 6 in 6,798?T
What is the value of the 4 in 9,408?C
What is the value of the 6 in 9,462?M
What is the value of the 2 in 4,721?N
What is the value of the 3 in 346?O
What is the value of the 9 in 7,794?I
What is the value of the 5 in 538?L
What is the value of the 1 in 9,512?H
What is the value of the 3 in 3,004?S
What is the value of the 4 in 84,635?A
What is the value of the 8 in 28,441?V
What is the value of the 8 in 285?E
What is the value of the 9 in 914?R
What is the value of the 3 in 5,034?F
0/14 letters found
Clue 2
Addition
You gather all the spilled potion ingredients from the floor. Adding the counts of beetle eyes and lacewing flies gives us a magical number and a new 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
855
938
384
765
970
665
665
339
970
611
282
453
384
286
T
855
938
384
970
806
665
384
555
T
855
938
339
611
286
T
855
829
305
339
453
T
855
336 + 519 =T
434 + 231 =L
183 + 99 =U
583 + 387 =I
220 + 119 =A
388 + 441 =O
140 + 165 =C
289 + 322 =N
397 + 368 =V
540 + 266 =R
306 + 249 =F
533 + 405 =H
160 + 224 =E
202 + 251 =S
180 + 106 =D
0/15 letters found
Clue 3
Subtraction
Someone took Floo powder from the pot. Subtracting the remaining scoops from yesterday's total shows exactly how much was stolen, unlocking another hint.
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
224
400
251
387
601
527
527
294
601
732
400
294
T
224
251
264
219
654
527
418
108
294
T
224
251
539
264
443
539
601
732
477
527
251
264
332 - 108 =T
362 - 68 =A
711 - 57 =O
340 - 121 =C
665 - 138 =L
668 - 191 =K
1021 - 289 =N
384 - 133 =E
626 - 183 =P
592 - 53 =R
980 - 379 =I
457 - 349 =W
601 - 201 =H
634 - 216 =D
617 - 353 =S
731 - 344 =V
0/16 letters found
Clue 4
Rounding
A magical gauge measures the dark magic in the room. The unstable dial spins wildly and only locks on a rounded number. This rounded value points to a 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.
D
70
5000
80
3000
60
500
5000
40
3000
30
5000
400
80
300
5000
900
50
9000
800
90
D
70
5000
8000
8000
30
20
900
40
20
90
20
Round 70 to the nearest tenD
Round 501 to the nearest hundredL
Round 62 to the nearest tenB
Round 8,432 to the nearest thousandT
Round 5,233 to the nearest thousandA
Round 837 to the nearest hundredU
Round 49 to the nearest tenF
Round 39 to the nearest tenC
Round 296 to the nearest hundredW
Round 23 to the nearest tenE
Round 89 to the nearest tenN
Round 27 to the nearest tenH
Round 412 to the nearest hundredI
Round 8,685 to the nearest thousandO
Round 84 to the nearest tenR
Round 2,702 to the nearest thousandK
Round 906 to the nearest hundredS
0/17 letters found
Clue 5
Division facts (1-12) — the last clue
You share a bag of Bertie Bott's Beans equally among the search party. The equal share each wizard gets points to the final clue about the villain.
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
108 ÷ 9 = ?
12 ÷ 6 = ?
3 ÷ 1 = ?
88 ÷ 8 = ?
21 ÷ 3 = ?
110 ÷ 11 = ?
20 ÷ 5 = ?
2 ÷ 2 = ?
30 ÷ 5 = ?
10 ÷ 2 = ?
63 ÷ 7 = ?
Step 2 — cross out the sentence with each answer
1.The villain uses a memory spell on the portrait guard, then runs off after transforming into a cat.
2.The villain summons a silver patronus in the corridor, then fades away under an invisibility cloak.
3.The villain casts a levitation charm on the classroom desks, then slips into a secret passage behind a mirror.
4.The villain brews a shrinking potion in a silver cauldron, then escapes by flying on a broom.
5.The villain casts a levitation charm on the classroom desks, then decodes the ancient runes on the locked door.
6.The villain casts a levitation charm on the classroom desks, then escapes by flying on a broom.
7.The villain brews a shrinking potion in a silver cauldron, then runs off after transforming into a cat.
8.The villain conjures red and gold magical sparks, then fades away under an invisibility cloak.
9.The villain conjures red and gold magical sparks, then slips into a secret passage behind a mirror.
10.The villain uses a memory spell on the portrait guard, then decodes the ancient runes on the locked door.
11.The villain summons a silver patronus in the corridor, then runs off after transforming into a cat.
12.The villain casts a levitation charm on the classroom desks, then fades away under an invisibility cloak.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Mystery of the Missing Remembrall
Culprit: Quentin Trimble (conjuring magical sparks · wearing an invisibility cloak · holding wand in left hand · dark black hair · disliking cold water)
- Clue 1 (Place value): "THE VILLAIN CANNOT TRANSFORM INTO A CAT"What is the value of the 6 in 6,798? = 6000 (T) · What is the value of the 4 in 9,408? = 400 (C) · What is the value of the 6 in 9,462? = 60 (M) · What is the value of the 2 in 4,721? = 20 (N) · What is the value of the 3 in 346? = 300 (O) · What is the value of the 9 in 7,794? = 90 (I) · What is the value of the 5 in 538? = 500 (L) · What is the value of the 1 in 9,512? = 10 (H) · What is the value of the 3 in 3,004? = 3000 (S) · What is the value of the 4 in 84,635? = 4000 (A) · What is the value of the 8 in 28,441? = 8000 (V) · What is the value of the 8 in 285? = 80 (E) · What is the value of the 9 in 914? = 900 (R) · What is the value of the 3 in 5,034? = 30 (F)
- Clue 2 (Addition): "THE VILLAIN USED THEIR LEFT HAND TO CAST"336 + 519 = 855 (T) · 434 + 231 = 665 (L) · 183 + 99 = 282 (U) · 583 + 387 = 970 (I) · 220 + 119 = 339 (A) · 388 + 441 = 829 (O) · 140 + 165 = 305 (C) · 289 + 322 = 611 (N) · 397 + 368 = 765 (V) · 540 + 266 = 806 (R) · 306 + 249 = 555 (F) · 533 + 405 = 938 (H) · 160 + 224 = 384 (E) · 202 + 251 = 453 (S) · 180 + 106 = 286 (D)
- Clue 3 (Subtraction): "THE VILLAIN HATES COLD WATER SPRINKLES"332 - 108 = 224 (T) · 362 - 68 = 294 (A) · 711 - 57 = 654 (O) · 340 - 121 = 219 (C) · 665 - 138 = 527 (L) · 668 - 191 = 477 (K) · 1021 - 289 = 732 (N) · 384 - 133 = 251 (E) · 626 - 183 = 443 (P) · 592 - 53 = 539 (R) · 980 - 379 = 601 (I) · 457 - 349 = 108 (W) · 601 - 201 = 400 (H) · 634 - 216 = 418 (D) · 617 - 353 = 264 (S) · 731 - 344 = 387 (V)
- Clue 4 (Rounding): "DARK BLACK HAIR WAS FOUND AT THE SCENE"Round 70 to the nearest ten = 70 (D) · Round 501 to the nearest hundred = 500 (L) · Round 62 to the nearest ten = 60 (B) · Round 8,432 to the nearest thousand = 8000 (T) · Round 5,233 to the nearest thousand = 5000 (A) · Round 837 to the nearest hundred = 800 (U) · Round 49 to the nearest ten = 50 (F) · Round 39 to the nearest ten = 40 (C) · Round 296 to the nearest hundred = 300 (W) · Round 23 to the nearest ten = 20 (E) · Round 89 to the nearest ten = 90 (N) · Round 27 to the nearest ten = 30 (H) · Round 412 to the nearest hundred = 400 (I) · Round 8,685 to the nearest thousand = 9000 (O) · Round 84 to the nearest ten = 80 (R) · Round 2,702 to the nearest thousand = 3000 (K) · Round 906 to the nearest hundred = 900 (S)
- Clue 5 (Division facts (1-12)): surviving statement (box 8) → Quentin Trimble108 ÷ 9 = 12 · 12 ÷ 6 = 2 · 3 ÷ 1 = 3 · 88 ÷ 8 = 11 · 21 ÷ 3 = 7 · 110 ÷ 11 = 10 · 20 ÷ 5 = 4 · 2 ÷ 2 = 1 · 30 ÷ 5 = 6 · 10 ÷ 2 = 5 · 63 ÷ 7 = 9
About this mystery
- Grade level
- Grade 3 math
- Math topics
- Place value, Addition, Subtraction, Rounding, Division
- Reading level
- grades 3-4
- Theme
- The Mystery of the Missing Remembrall — set in Hogwarts School of Witchcraft and Wizardry
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects