🔎 SchoolGrade 4Reading: grades 3-4Place valueAdditionMultiplicationRoundingDivision
The Great Hallway Hijack
Principal Vance's Golden Apple Trophy has vanished right before the annual School Spirit Assembly! Someone snuck into the main office and left a messy trail across the hallway.
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 | Gear Used | School Supply | Dominant Hand | Hair Style | Distraction |
|---|---|---|---|---|---|
| Jamie | Glitter Bomb | Red Pen | Left Handed | Curly Hair | Loud Whistle |
| Alex | Megaphone | Red Pen | Left Handed | Curly Hair | Flashlight Beam |
| Sam | Hallway Scooter | Sticky Notes | Left Handed | Spiky Hair | Flashlight Beam |
| Dallas | Megaphone | Chalk Dust | Left Handed | Spiky Hair | Loud Whistle |
| Casey | Hall Pass | Hall Monitor Badge | Left Handed | Curly Hair | Flashlight Beam |
| Riley | Megaphone | Chalk Dust | Right Handed | Spiky Hair | Squeaky Shoes |
| Kai | Homework Cannon | Hall Monitor Badge | Right Handed | Curly Hair | Flashlight Beam |
| Emerson | Hall Pass | Stencil Set | Right Handed | Spiky Hair | Flashlight Beam |
| Cameron | Glitter Bomb | Stencil Set | Right Handed | Spiky Hair | Loud Whistle |
| Morgan | Megaphone | Sticky Notes | Left Handed | Spiky Hair | Flashlight Beam |
| Quinn | Homework Cannon | Chalk Dust | Right Handed | Spiky Hair | Flashlight Beam |
| Taylor | Megaphone | Red Pen | Left Handed | Braided Hair | Loud Whistle |
| Avery | Hall Pass | Hall Monitor Badge | Left Handed | Curly Hair | Loud Whistle |
| Peyton | Hallway Scooter | Stencil Set | Right Handed | Braided Hair | Squeaky Shoes |
| Skyler | Glitter Bomb | Red Pen | Left Handed | Curly Hair | Flashlight Beam |
| Parker | Glitter Bomb | Hall Monitor Badge | Right Handed | Spiky Hair | Loud Whistle |
| Rowan | Homework Cannon | Red Pen | Right Handed | Braided Hair | Squeaky Shoes |
| Sawyer | Hallway Scooter | Stencil Set | Left Handed | Curly Hair | Flashlight Beam |
| Finley | Megaphone | Sticky Notes | Left Handed | Curly Hair | Flashlight Beam |
| Reese | Megaphone | Hall Monitor Badge | Right Handed | Spiky Hair | Flashlight Beam |
| Jordan | Megaphone | Hall Monitor Badge | Right Handed | Braided Hair | Flashlight Beam |
Clue 1
Place value
Detective Maya examined the locker digit combinations left on the chalkboard to decode 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
10
30
50
3000
4000
2000
2000
1000
4000
400
200
600
50
500
400
600
T
10
70
500
50
1000
500
T
10
50
400
300
4000
2000
500
50
T
10
What is the value of the 1 in 7,517?T
What is the value of the 1 in 71,068?A
What is the value of the 7 in 274?U
What is the value of the 5 in 8,452?E
What is the value of the 6 in 9,627?O
What is the value of the 4 in 4,571?I
What is the value of the 3 in 9,320?C
What is the value of the 2 in 2,301?L
What is the value of the 4 in 477?N
What is the value of the 2 in 9,217?D
What is the value of the 3 in 3,874?V
What is the value of the 5 in 7,517?S
What is the value of the 3 in 6,632?H
0/13 letters found
Clue 2
Addition
Detective Maya tallied up the total number of missing hall passes from all the teacher clipboards.
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
7752
4113
2084
8213
6012
5325
5994
9724
3331
T
7752
8063
5756
9268
5325
2084
7782
T
7752
4113
5756
6543
8306
2084
8306
3934 + 3818 =T
3192 + 3351 =N
2221 + 1110 =I
3015 + 5048 =W
4141 + 5127 =S
3481 + 4732 =C
3998 + 1758 =A
1672 + 2441 =H
5548 + 2758 =D
3144 + 2868 =U
1280 + 804 =E
2435 + 3559 =P
1863 + 3462 =L
6641 + 3083 =R
3600 + 4182 =F
0/15 letters found
Clue 3
Multiplication facts (1-12)
Detective Maya arranged the desk rows into equal groups to count the clue cards found in the library.
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
1
22
132
A
1
64
108
132
28
32
108
5
81
66
A
1
30
64
5
24
48
48
66
90
5
108
66
55
28
132
132
A
1
28
49
1 × 1 =A
7 × 7 =N
9 × 12 =H
8 × 4 =G
9 × 9 =B
2 × 11 =F
4 × 12 =P
3 × 10 =M
2 × 12 =O
1 × 5 =T
8 × 8 =S
5 × 11 =V
6 × 11 =E
4 × 7 =I
9 × 10 =D
12 × 11 =L
0/16 letters found
Clue 4
Rounding
Detective Maya checked the hallway security scanner readout which rounded the suspect step counts.
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
290
110
1100
430
500
230
2300
A
290
1700
430
4300
A
290
130
500
20
5000
300
A
290
300
300
2300
20
130
110
20
700
20
Round 293 to the nearest tenA
Round 134 to the nearest tenS
Round 2,266 to the nearest hundredH
Round 291 to the nearest hundredT
Round 700 to the nearest hundredN
Round 4,266 to the nearest hundredW
Round 232 to the nearest tenY
Round 426 to the nearest tenR
Round 17 to the nearest tenE
Round 5,043 to the nearest thousandF
Round 474 to the nearest hundredL
Round 1,689 to the nearest hundredI
Round 1,107 to the nearest hundredU
Round 112 to the nearest tenC
0/14 letters found
Clue 5
Division facts (1-12) — the last clue
Detective Maya divided the leftover raffle tickets equally among the suspects to reveal the final code.
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
5 ÷ 5 = ?
22 ÷ 11 = ?
77 ÷ 7 = ?
64 ÷ 8 = ?
32 ÷ 8 = ?
45 ÷ 9 = ?
30 ÷ 5 = ?
144 ÷ 12 = ?
110 ÷ 11 = ?
90 ÷ 10 = ?
12 ÷ 4 = ?
Step 2 — cross out the sentence with each answer
1.The villain blasted the loud megaphone, then signed with a red pen.
2.The villain blasted the loud megaphone, then stuck notes everywhere.
3.The villain zoomed away on a scooter, then stuck notes everywhere.
4.The villain zoomed away with a hall pass, then stuck notes everywhere.
5.The villain blasted the loud megaphone, then flashed a monitor badge.
6.The villain fired the homework cannon, then stuck notes everywhere.
7.The villain zoomed away with a hall pass, then flashed a monitor badge.
8.The villain fired the homework cannon, then signed with a red pen.
9.The villain popped a giant glitter bomb, then stuck notes everywhere.
10.The villain zoomed away on a scooter, then drew with a stencil set.
11.The villain popped a giant glitter bomb, then signed with a red pen.
12.The villain zoomed away with a hall pass, then signed with a red pen.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Great Hallway Hijack
Culprit: Casey (Hall Pass · Hall Monitor Badge · Left Handed · Curly Hair · Flashlight Beam)
- Clue 1 (Place value): "THE VILLAIN DOES NOT USE A STENCIL SET"What is the value of the 1 in 7,517? = 10 (T) · What is the value of the 1 in 71,068? = 1000 (A) · What is the value of the 7 in 274? = 70 (U) · What is the value of the 5 in 8,452? = 50 (E) · What is the value of the 6 in 9,627? = 600 (O) · What is the value of the 4 in 4,571? = 4000 (I) · What is the value of the 3 in 9,320? = 300 (C) · What is the value of the 2 in 2,301? = 2000 (L) · What is the value of the 4 in 477? = 400 (N) · What is the value of the 2 in 9,217? = 200 (D) · What is the value of the 3 in 3,874? = 3000 (V) · What is the value of the 5 in 7,517? = 500 (S) · What is the value of the 3 in 6,632? = 30 (H)
- Clue 2 (Addition): "THE CULPRIT WAS LEFT HANDED"3934 + 3818 = 7752 (T) · 3192 + 3351 = 6543 (N) · 2221 + 1110 = 3331 (I) · 3015 + 5048 = 8063 (W) · 4141 + 5127 = 9268 (S) · 3481 + 4732 = 8213 (C) · 3998 + 1758 = 5756 (A) · 1672 + 2441 = 4113 (H) · 5548 + 2758 = 8306 (D) · 3144 + 2868 = 6012 (U) · 1280 + 804 = 2084 (E) · 2435 + 3559 = 5994 (P) · 1863 + 3462 = 5325 (L) · 6641 + 3083 = 9724 (R) · 3600 + 4182 = 7782 (F)
- Clue 3 (Multiplication facts (1-12)): "A FLASHLIGHT BEAM STOPPED THE VILLAIN"1 × 1 = 1 (A) · 7 × 7 = 49 (N) · 9 × 12 = 108 (H) · 8 × 4 = 32 (G) · 9 × 9 = 81 (B) · 2 × 11 = 22 (F) · 4 × 12 = 48 (P) · 3 × 10 = 30 (M) · 2 × 12 = 24 (O) · 1 × 5 = 5 (T) · 8 × 8 = 64 (S) · 5 × 11 = 55 (V) · 6 × 11 = 66 (E) · 4 × 7 = 28 (I) · 9 × 10 = 90 (D) · 12 × 11 = 132 (L)
- Clue 4 (Rounding): "A CURLY HAIR WAS LEFT AT THE SCENE"Round 293 to the nearest ten = 290 (A) · Round 134 to the nearest ten = 130 (S) · Round 2,266 to the nearest hundred = 2300 (H) · Round 291 to the nearest hundred = 300 (T) · Round 700 to the nearest hundred = 700 (N) · Round 4,266 to the nearest hundred = 4300 (W) · Round 232 to the nearest ten = 230 (Y) · Round 426 to the nearest ten = 430 (R) · Round 17 to the nearest ten = 20 (E) · Round 5,043 to the nearest thousand = 5000 (F) · Round 474 to the nearest hundred = 500 (L) · Round 1,689 to the nearest hundred = 1700 (I) · Round 1,107 to the nearest hundred = 1100 (U) · Round 112 to the nearest ten = 110 (C)
- Clue 5 (Division facts (1-12)): surviving statement (box 7) → Casey5 ÷ 5 = 1 · 22 ÷ 11 = 2 · 77 ÷ 7 = 11 · 64 ÷ 8 = 8 · 32 ÷ 8 = 4 · 45 ÷ 9 = 5 · 30 ÷ 5 = 6 · 144 ÷ 12 = 12 · 110 ÷ 11 = 10 · 90 ÷ 10 = 9 · 12 ÷ 4 = 3
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Place value, Addition, Multiplication, Rounding, Division
- Reading level
- grades 3-4
- Theme
- The Great Hallway Hijack — set in Oak Creek Elementary School
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects