Math Crackers
🏎️ ScaryGrade 5Reading: grades 5-6AdditionSubtractionFractions of a numberOrder of operationsDivision

The Phantom of Blackwood Manor

A creepy shadow creature has raided the Whispering Archives of Blackwood Manor, locking away the town's oldest histories. Detective, examine the eerie evidence left behind to unmask the culprit before midnight!

Suspects

Possible suspects

Cross off a row as each clue rules it out. On screen, tap a row.

21 of 21 still in play
NameGhostly PowerHaunted ArtifactGlove HabitHair EvidenceSpectral Weakness
Peter StraubShadow MelterCursed CompassWears Right GloveSilver StrandsBright Sunlight
Dean KoontzGhostly FlightIron ChainsWears Left GloveRaven BlackSalt Powder
Anne RiceMind EchoBone WhistleWears Left GloveAshen GreyBright Sunlight
Neil GaimanGloom ShroudPhantom LanternWears Left GloveRaven BlackSalt Powder
Mary ShelleyFrost ChillPhantom LanternWears Left GloveRaven BlackSalt Powder
Bram StokerMind EchoBone WhistleWears Left GloveRaven BlackSilver Bell
Ira LevinShadow MelterCursed CompassWears Left GloveAshen GreySalt Powder
Richard MathesonFrost ChillCursed CompassWears Right GloveSilver StrandsSilver Bell
Ray BradburyGhostly FlightSpectral MirrorWears Right GloveRaven BlackSilver Bell
Victor FrankensteinShadow MelterCursed CompassWears Right GloveRaven BlackSilver Bell
Ambrose BierceMind EchoPhantom LanternWears Left GloveAshen GreySilver Bell
Robert BlochGloom ShroudBone WhistleWears Right GloveRaven BlackSalt Powder
Clive BarkerFrost ChillIron ChainsWears Right GloveAshen GreyBright Sunlight
M R JamesFrost ChillIron ChainsWears Right GloveRaven BlackSilver Bell
Arthur DoyleGloom ShroudBone WhistleWears Left GloveAshen GreyBright Sunlight
Wilkie CollinsShadow MelterBone WhistleWears Left GloveRaven BlackBright Sunlight
R L StineMind EchoCursed CompassWears Left GloveRaven BlackBright Sunlight
H P LovecraftGhostly FlightCursed CompassWears Left GloveAshen GreySalt Powder
Shirley JacksonGloom ShroudBone WhistleWears Left GloveRaven BlackSalt Powder
Stephen KingFrost ChillBone WhistleWears Left GloveAshen GreySilver Bell
Edgar PoeMind EchoBone WhistleWears Left GloveRaven BlackSalt Powder
Clue 1

Addition

The night curator tallied up all the ancient spellbooks recovered from dusty shelves 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
4672
8838
6146
6703
8838
9723
7237
T
4672
6682
4338
4164
6682
6146
7852
7237
6682
T
4672
3448
9723
3479
3479
9751
8597
3479
6682
7237
3448
8838
9723
8597
7237
7852
1449 + 3223 =T
2891 + 5947 =H
4436 + 4161 =I
4137 + 5586 =A
1101 + 2378 =R
3604 + 4248 =S
1497 + 1951 =C
2513 + 1825 =M
2713 + 3969 =O
1737 + 2427 =D
4083 + 2620 =P
3469 + 3768 =N
2606 + 3540 =E
5466 + 4285 =Y
0/14 letters found
Clue 2

Subtraction

Subtracting the extinguished candles from the total stock revealed a hidden encrypted note behind the altar.

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
5631
2899
3767
8813
2899
1446
8060
T
5631
7907
4608
7402
7907
7780
3767
1446
4924
4594
7907
4853
3767
7907
8060
T
5631
2899
3767
4594
3767
5781
T
5631
2899
1446
8060
7450
7350 - 1719 =T
9490 - 1583 =O
11961 - 4181 =R
4622 - 28 =L
4923 - 315 =M
10590 - 1777 =P
8826 - 3973 =V
8902 - 3978 =G
10753 - 3303 =D
10250 - 4469 =F
4225 - 1326 =H
9622 - 2220 =W
5074 - 3628 =A
6633 - 2866 =E
12085 - 4025 =N
0/15 letters found
Clue 3

Fractions of a number

The detective calculated a fractional portion of gargoyle statues pointing toward the phantom's secret hideout.

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
34
35
26
27
35
29
21
T
34
32
22
18
37
26
26
6
18
39
32
22
6
29
37
T
34
27
32
7
9
26
39
2/5 of 85 =T
3/10 of 70 =N
3/6 of 44 =M
4/8 of 18 =D
1/10 of 60 =S
7/10 of 50 =H
4/8 of 74 =L
5/10 of 52 =E
4/8 of 78 =R
1/4 of 28 =W
6/8 of 36 =P
4/10 of 80 =O
1/8 of 144 =F
3/6 of 58 =A
0/14 letters found
Clue 4

Order of operations

Following the strict order of multi-step steps to unlatch the iron vault lock produced the key evidence.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

R
60
12
24
48
8
45
40
12
61
20
36
50
R
60
12
8
70
36
15
48
40
40
12
50
50
43
48
36
61
48
8
48
48 + 3 × 4 =R
8 + 2 × 2 =A
12 × 5 - 10 =T
7 × 6 - 6 =S
7 × 3 - 1 =K
7 × 7 - 4 =B
6 × 6 - 28 =N
7 × 10 - 22 =E
9 × 10 - 20 =D
8 × 8 - 21 =H
29 + 4 × 8 =C
7 × 6 - 18 =V
7 × 7 - 9 =L
7 × 6 - 27 =F
0/14 letters found
Clue 5

Division facts (1-12) — the last clue

Dividing the protective charms equally among search teams uncovered the final whisper clue.

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 ÷ 1 = ?
24 ÷ 2 = ?
32 ÷ 8 = ?
35 ÷ 5 = ?
88 ÷ 8 = ?
40 ÷ 4 = ?
1 ÷ 1 = ?
36 ÷ 4 = ?
3 ÷ 1 = ?
48 ÷ 6 = ?
10 ÷ 5 = ?
Step 2 — cross out the sentence with each answer
1.The villain whispered echoes through the dark hall, then snapped the cursed compass shut.
2.The villain melted into the cold shadows, then snapped the cursed compass shut.
3.The villain chilled the room with a sudden frost, then blew a sharp tune on the bone whistle.
4.The villain shrouded the corridor in heavy gloom, then blew a sharp tune on the bone whistle.
5.The villain shrouded the corridor in heavy gloom, then swung the glowing phantom lantern.
6.The villain whispered echoes through the dark hall, then blew a sharp tune on the bone whistle.
7.The villain flew silently through the haunted attic, then blew a sharp tune on the bone whistle.
8.The villain whispered echoes through the dark hall, then gazed into a spooky spectral mirror.
9.The villain melted into the cold shadows, then swung the glowing phantom lantern.
10.The villain shrouded the corridor in heavy gloom, then rattled heavy iron chains.
11.The villain chilled the room with a sudden frost, then rattled heavy iron chains.
12.The villain chilled the room with a sudden frost, then swung the glowing phantom lantern.
Solve it

Name the culprit

Choose the one suspect left standing.

About this mystery

Grade level
Grade 5 math
Math topics
Addition, Subtraction, Fractions of a number, Order of operations, Division
Reading level
grades 5-6
Theme
The Phantom of Blackwood Manor — set in Blackwood Manor Whispering Archives
Format
Interactive online & printable worksheet with answer key
Solution
One unique, verified culprit among 21 suspects

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