🔎 Fall, autumn, mystery, booksGrade 5Reading: grades 5-6Fractions of a numberWord problemsOrder of operationsMultiplication
The Mystery of the Autumn Manor Library
During the annual Autumn Harvest Festival, a rare manuscript vanished from the drafty study of Maplewood Manor. Crisp fallen leaves blow through the open window, and mysterious tea stains mark the scene. As the lead detective, you must unravel the clues hidden in the library archives before the thief slips away into the foggy autumn night.
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 | Artifact | Keepsake | Writing Hand | Hair Color | Weakness |
|---|---|---|---|---|---|
| H G Wells | Magic Bookmark | Maple Leaf Charm | Right-Handed Writer | Raven Black | Fresh Apple Cider |
| Edgar Poe | Reader Glass | Golden Acorn | Right-Handed Writer | Amber Red | Fresh Apple Cider |
| Lewis Carroll | Reader Glass | Pumpkin Lantern | Left-Handed Writer | Chestnut Brown | Fresh Apple Cider |
| Hans Andersen | Reader Glass | Pumpkin Lantern | Left-Handed Writer | Raven Black | Bright Reading Lamp |
| Jules Verne | Shadow Page | Pumpkin Lantern | Right-Handed Writer | Raven Black | Bright Reading Lamp |
| Astrid Lindgren | Glowing Quill | Maple Leaf Charm | Right-Handed Writer | Chestnut Brown | Fresh Apple Cider |
| Arthur Doyle | Shadow Page | Pumpkin Lantern | Left-Handed Writer | Raven Black | Bright Reading Lamp |
| Beatrix Potter | Glowing Quill | Maple Leaf Charm | Left-Handed Writer | Raven Black | Dust Mite Spray |
| Louisa Alcott | Shadow Page | Maple Leaf Charm | Right-Handed Writer | Amber Red | Dust Mite Spray |
| Frank Baum | Reader Glass | Cinnamon Scroll | Left-Handed Writer | Chestnut Brown | Bright Reading Lamp |
| Joe Hardy | Enchanted Ink | Maple Leaf Charm | Left-Handed Writer | Raven Black | Bright Reading Lamp |
| Frank Hardy | Shadow Page | Golden Acorn | Left-Handed Writer | Raven Black | Dust Mite Spray |
| Oscar Wilde | Reader Glass | Spice Tea Thermos | Right-Handed Writer | Amber Red | Dust Mite Spray |
| Agatha Christie | Magic Bookmark | Cinnamon Scroll | Left-Handed Writer | Raven Black | Bright Reading Lamp |
| Charles Dickens | Enchanted Ink | Maple Leaf Charm | Left-Handed Writer | Chestnut Brown | Bright Reading Lamp |
| Judy Blume | Reader Glass | Pumpkin Lantern | Left-Handed Writer | Amber Red | Fresh Apple Cider |
| Maurice Sendak | Reader Glass | Pumpkin Lantern | Right-Handed Writer | Amber Red | Fresh Apple Cider |
| Bram Stoker | Shadow Page | Spice Tea Thermos | Right-Handed Writer | Chestnut Brown | Fresh Apple Cider |
| Nancy Drew | Glowing Quill | Spice Tea Thermos | Left-Handed Writer | Raven Black | Bright Reading Lamp |
| Enid Blyton | Magic Bookmark | Pumpkin Lantern | Right-Handed Writer | Raven Black | Bright Reading Lamp |
| Emily Bronte | Magic Bookmark | Spice Tea Thermos | Left-Handed Writer | Raven Black | Fresh Apple Cider |
Clue 1
Fractions of a number
You examine the library logbook where the missing manuscript numbers are described in short store records.
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
17
4
8
32
30
30
11
32
29
24
28
4
10
29
28
T
19
20
11
6
6
39
11
10
25
32
20
4
T
19
4
11
T
19
17
4
6
9
28
10
1/8 of 152 =T
4/8 of 56 =O
1/5 of 45 =M
2/5 of 25 =S
4/8 of 48 =D
2/6 of 51 =H
2/8 of 44 =A
2/3 of 9 =R
2/10 of 145 =N
2/10 of 125 =P
1/2 of 64 =I
1/8 of 160 =C
3/4 of 40 =L
3/6 of 78 =Y
1/5 of 40 =V
8/10 of 5 =E
0/16 letters found
Clue 2
Word problems
A torn catalog sheet lists fractions of the archive stack inventory that remain undisturbed.
Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.
Awitnesssawthevillainwas .
L
71
93
105
40
28
36
37
D
93
D
W
R
I
40
93
R
There were 102 leather books. 31 were used up. How many leather books are left?L
Archivist found 10 magnifying glasses yesterday and 18 more today. How many magnifying glasses in all?H
Archivist lined up 4 rows of 10 magnifying glasses. How many magnifying glasses in all?T
Archivist found 20 pumpkin bookmarks yesterday and 16 more today. How many pumpkin bookmarks in all?A
Archivist found 88 feather quills yesterday and 17 more today. How many feather quills in all?F
Archivist found 28 autumn leaves yesterday and 9 more today. How many autumn leaves in all?N
There were 116 feather quills. 23 were used up. How many feather quills are left?E
0/7 letters found
Clue 3
Order of operations
To unlock the wooden cabinet behind the chimney, you must solve a order of operations sequence on a brass lock.
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
74
71
20
39
T
74
T
74
39
28
11
20
34
63
39
62
15
49
44
23
13
20
13
15
37
39
15
34
44
78
71
T
74
34
20
39
13
44
23
78
49
39
21
32
7 × 11 - 3 =T
6 × 12 - 23 =L
11 + 6 × 2 =N
50 + 3 × 4 =S
7 × 6 - 3 =A
5 + 2 × 3 =K
20 + 3 × 4 =P
11 × 2 - 1 =M
29 + 6 × 7 =H
20 + 4 × 2 =C
8 × 7 - 12 =I
5 × 8 - 25 =B
3 + 5 × 2 =D
11 × 6 - 3 =W
4 × 11 - 10 =R
9 × 9 - 3 =G
7 × 4 - 8 =E
6 × 11 - 29 =Y
0/18 letters found
Clue 4
Multiplication facts (1-12)
The suspect arranged stolen book crates into identical rows across the autumn reading lawn.
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
88
22
63
3
24
110
40
33
A
88
20
40
3
6
110
A
88
100
72
84
A
88
63
33
4
A
88
22
121
33
A
88
70
70
40
36
63
3
A
88
70
A
88
24
40
8 × 11 =A
10 × 10 =C
9 × 7 =I
11 × 3 =R
7 × 10 =P
11 × 11 =T
11 × 2 =S
3 × 1 =N
11 × 10 =L
6 × 12 =K
7 × 12 =H
10 × 4 =E
6 × 1 =B
6 × 4 =G
10 × 2 =V
12 × 3 =D
2 × 2 =W
0/17 letters found
Clue 5
Fractions of a number — the last clue
Calculating the leftover pumpkin ink supplies requires determining exact fractions of the original batch.
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
2/6 of 6 = ?
1/6 of 6 = ?
2/6 of 36 = ?
1/4 of 24 = ?
2/8 of 28 = ?
1/3 of 33 = ?
4/6 of 15 = ?
4/6 of 12 = ?
4/8 of 10 = ?
1/8 of 72 = ?
1/5 of 15 = ?
Step 2 — cross out the sentence with each answer
1.The villain scrambles the archive shelves, then leaves a trail of pumpkin seeds.
2.The villain hides the golden bookmark, then scatters crisp maple leaves.
3.The villain hides the golden bookmark, then drops an empty spice tea thermos.
4.The villain swipes the rare manuscript, then unrolls a dusty cinnamon scroll.
5.The villain enchants the card catalog, then leaves a trail of pumpkin seeds.
6.The villain scrambles the archive shelves, then buries a golden acorn in a desk.
7.The villain swipes the rare manuscript, then leaves a trail of pumpkin seeds.
8.The villain traps the catalog in shadows, then unrolls a dusty cinnamon scroll.
9.The villain enchants the card catalog, then buries a golden acorn in a desk.
10.The villain swipes the rare manuscript, then buries a golden acorn in a desk.
11.The villain swipes the rare manuscript, then scatters crisp maple leaves.
12.The villain traps the catalog in shadows, then leaves a trail of pumpkin seeds.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Mystery of the Autumn Manor Library
Culprit: Agatha Christie (Magic Bookmark · Cinnamon Scroll · Left-Handed Writer · Raven Black · Bright Reading Lamp)
- Clue 1 (Fractions of a number): "THE VILLAIN DOES NOT CARRY A SPICE TEA THERMOS"1/8 of 152 = 19 (T) · 4/8 of 56 = 28 (O) · 1/5 of 45 = 9 (M) · 2/5 of 25 = 10 (S) · 4/8 of 48 = 24 (D) · 2/6 of 51 = 17 (H) · 2/8 of 44 = 11 (A) · 2/3 of 9 = 6 (R) · 2/10 of 145 = 29 (N) · 2/10 of 125 = 25 (P) · 1/2 of 64 = 32 (I) · 1/8 of 160 = 20 (C) · 3/4 of 40 = 30 (L) · 3/6 of 78 = 39 (Y) · 1/5 of 40 = 8 (V) · 8/10 of 5 = 4 (E)
- Clue 2 (Word problems): "LEFT HANDED WRITER"There were 102 leather books. 31 were used up. How many leather books are left? = 71 (L) · Archivist found 10 magnifying glasses yesterday and 18 more today. How many magnifying glasses in all? = 28 (H) · Archivist lined up 4 rows of 10 magnifying glasses. How many magnifying glasses in all? = 40 (T) · Archivist found 20 pumpkin bookmarks yesterday and 16 more today. How many pumpkin bookmarks in all? = 36 (A) · Archivist found 88 feather quills yesterday and 17 more today. How many feather quills in all? = 105 (F) · Archivist found 28 autumn leaves yesterday and 9 more today. How many autumn leaves in all? = 37 (N) · There were 116 feather quills. 23 were used up. How many feather quills are left? = 93 (E)
- Clue 3 (Order of operations): "THE ATTACKER WAS BLINDED BY A BRIGHT READING LAMP"7 × 11 - 3 = 74 (T) · 6 × 12 - 23 = 49 (L) · 11 + 6 × 2 = 23 (N) · 50 + 3 × 4 = 62 (S) · 7 × 6 - 3 = 39 (A) · 5 + 2 × 3 = 11 (K) · 20 + 3 × 4 = 32 (P) · 11 × 2 - 1 = 21 (M) · 29 + 6 × 7 = 71 (H) · 20 + 4 × 2 = 28 (C) · 8 × 7 - 12 = 44 (I) · 5 × 8 - 25 = 15 (B) · 3 + 5 × 2 = 13 (D) · 11 × 6 - 3 = 63 (W) · 4 × 11 - 10 = 34 (R) · 9 × 9 - 3 = 78 (G) · 7 × 4 - 8 = 20 (E) · 6 × 11 - 29 = 37 (Y)
- Clue 4 (Multiplication facts (1-12)): "A SINGLE RAVEN BLACK HAIR WAS TRAPPED IN A PAGE"8 × 11 = 88 (A) · 10 × 10 = 100 (C) · 9 × 7 = 63 (I) · 11 × 3 = 33 (R) · 7 × 10 = 70 (P) · 11 × 11 = 121 (T) · 11 × 2 = 22 (S) · 3 × 1 = 3 (N) · 11 × 10 = 110 (L) · 6 × 12 = 72 (K) · 7 × 12 = 84 (H) · 10 × 4 = 40 (E) · 6 × 1 = 6 (B) · 6 × 4 = 24 (G) · 10 × 2 = 20 (V) · 12 × 3 = 36 (D) · 2 × 2 = 4 (W)
- Clue 5 (Fractions of a number): surviving statement (box 4) → Agatha Christie2/6 of 6 = 2 · 1/6 of 6 = 1 · 2/6 of 36 = 12 · 1/4 of 24 = 6 · 2/8 of 28 = 7 · 1/3 of 33 = 11 · 4/6 of 15 = 10 · 4/6 of 12 = 8 · 4/8 of 10 = 5 · 1/8 of 72 = 9 · 1/5 of 15 = 3
About this mystery
- Grade level
- Grade 5 math
- Math topics
- Fractions of a number, Word problems, Order of operations, Multiplication
- Reading level
- grades 5-6
- Theme
- The Mystery of the Autumn Manor Library — set in Maplewood Manor Archives
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects