🔎 SchoolGrade 4Reading: grades 3-4RoundingAdditionSubtractionMultiplicationDivision
The Great Schoolhouse Scramble
Someone scrambled the master schedule and locked Principal Rivera in the Teachers Lounge! Detective, help us 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 | Prank Tool | Secret Stash | Handedness | Hair Color | Distraction |
|---|---|---|---|---|---|
| Charlie Chen | Whoopee Cushion | Library Cards | Left Handed | Sandy Blond | Gold Star Sticker |
| Uma Foster | Fake Snake | Hall Passes | Left Handed | Sandy Blond | Recess Bell |
| Gabe Brooks | Stink Bomb | Hall Passes | Right Handed | Sandy Blond | Juice Box |
| Daisy Miller | Whoopee Cushion | Lunch Tickets | Left Handed | Sandy Blond | Gold Star Sticker |
| Hannah Kim | Silly String | Hall Passes | Left Handed | Sandy Blond | Gold Star Sticker |
| Fiona Patel | Stink Bomb | Library Cards | Right Handed | Sandy Blond | Gold Star Sticker |
| Quinn Hall | Stink Bomb | Box Tops | Left Handed | Sandy Blond | Recess Bell |
| Paul Rivera | Silly String | Hall Passes | Right Handed | Sandy Blond | Gold Star Sticker |
| Bella Cruz | Fake Snake | Library Cards | Right Handed | Sandy Blond | Gold Star Sticker |
| Sam Evans | Fake Snake | Lunch Tickets | Right Handed | Sandy Blond | Juice Box |
| Victor Wright | Whoopee Cushion | Lunch Tickets | Right Handed | Sandy Blond | Recess Bell |
| Wendy Diaz | Stink Bomb | Hall Passes | Left Handed | Bright Red | Juice Box |
| Mason Scott | Whoopee Cushion | Box Tops | Right Handed | Sandy Blond | Recess Bell |
| Tina Lopez | Itching Powder | Hall Passes | Left Handed | Bright Red | Gold Star Sticker |
| Ian Gomez | Fake Snake | Gold Stars | Left Handed | Sandy Blond | Gold Star Sticker |
| Lily Zhang | Itching Powder | Library Cards | Right Handed | Jet Black | Recess Bell |
| Ethan Reed | Stink Bomb | Gold Stars | Left Handed | Sandy Blond | Juice Box |
| Maya Lin | Silly String | Library Cards | Left Handed | Jet Black | Juice Box |
| Julia Vance | Fake Snake | Hall Passes | Left Handed | Sandy Blond | Juice Box |
| Riley Cooper | Silly String | Gold Stars | Left Handed | Bright Red | Gold Star Sticker |
| Kevin Hayes | Fake Snake | Library Cards | Left Handed | Sandy Blond | Gold Star Sticker |
Clue 1
Rounding
The digital clock in the hallway rounded the time to the nearest ten minutes.
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
3700
230
700
170
4300
290
2900
500
50
T
3700
700
4300
3000
370
700
50
2900
370
T
3700
20
290
4300
4300
1300
70
90
2900
20
230
T
3700
110
20
500
700
T
3700
50
Round 3,743 to the nearest hundredT
Round 2,886 to the nearest hundredN
Round 71 to the nearest tenL
Round 46 to the nearest tenS
Round 735 to the nearest hundredE
Round 227 to the nearest tenH
Round 171 to the nearest tenP
Round 492 to the nearest hundredK
Round 4,283 to the nearest hundredR
Round 87 to the nearest tenU
Round 1,325 to the nearest hundredY
Round 289 to the nearest tenA
Round 111 to the nearest tenI
Round 3,062 to the nearest thousandD
Round 24 to the nearest tenC
Round 366 to the nearest tenO
0/16 letters found
Clue 2
Addition
We tallied up the total number of missing hall passes from each classroom.
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
2485
5673
2359
6635
3556
T
2485
7294
2359
4855
4855
4855
8268
6635
8268
7702
2359
7655
T
2485
5673
8268
7294
2737
2359
2737
6635
6266
3556
T
2485
2359
6266
1389 + 1096 =T
2833 + 2022 =S
2665 + 3008 =H
1148 + 1211 =E
2253 + 4382 =W
4436 + 3266 =L
1107 + 1630 =D
4193 + 2073 =R
5109 + 3159 =A
1544 + 2012 =I
4004 + 3290 =N
3013 + 4642 =F
0/12 letters found
Clue 3
Subtraction
We subtracted the recovered library cards from the total missing stack.
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
7629
4791
2259
5214
7112
2605
5567
8832
4548
T
7629
2259
7112
5505
4661
T
7629
5643
8727
4548
T
7629
7112
2605
7289
T
7629
2259
5643
2131
1422
2605
5505
4661
4805
5643
4548
T
7629
2605
7112
8807 - 1178 =T
4952 - 3530 =Y
11291 - 4179 =R
6994 - 2189 =L
7781 - 2138 =D
12039 - 3207 =K
4033 - 1428 =A
5369 - 3110 =E
5282 - 621 =O
7562 - 273 =C
5589 - 375 =P
11306 - 2579 =I
9702 - 4135 =N
10033 - 4528 =G
6558 - 1767 =H
9403 - 4855 =S
2811 - 680 =B
0/17 letters found
Clue 4
Multiplication facts (1-12)
The teacher organized the desk trays into equal rows to count the 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.
S
49
50
77
44
15
9
88
32
77
44
72
50
28
20
56
50
S
49
5
50
27
18
72
30
32
77
30
72
100
88
50
30
5
72
7 × 7 =S
11 × 8 =L
9 × 8 =H
10 × 10 =E
3 × 9 =U
11 × 4 =D
4 × 8 =O
5 × 6 =T
10 × 2 =R
7 × 4 =I
3 × 6 =G
9 × 1 =B
3 × 5 =Y
10 × 5 =A
7 × 8 =W
5 × 1 =C
7 × 11 =N
0/17 letters found
Clue 5
Division facts (1-12) — the last clue
We split the clues equally among the student detectives to analyze.
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
9 ÷ 1 = ?
10 ÷ 10 = ?
8 ÷ 4 = ?
60 ÷ 12 = ?
84 ÷ 7 = ?
33 ÷ 11 = ?
80 ÷ 8 = ?
63 ÷ 9 = ?
99 ÷ 9 = ?
24 ÷ 4 = ?
96 ÷ 12 = ?
Step 2 — cross out the sentence with each answer
1.The villain placed a rubber fake snake, then took a pile of library cards.
2.The villain sprayed sticky silly string, then swiped a stack of hall passes.
3.The villain set off a smelly stink bomb, then stole a sheet of gold stars.
4.The villain placed a rubber fake snake, then stole a sheet of gold stars.
5.The villain dropped a noisy whoopee cushion, then snapped up lunch tickets.
6.The villain set off a smelly stink bomb, then swiped a stack of hall passes.
7.The villain sprayed sticky silly string, then took a pile of library cards.
8.The villain sprinkled itchy itching powder, then took a pile of library cards.
9.The villain dropped a noisy whoopee cushion, then took a pile of library cards.
10.The villain placed a rubber fake snake, then swiped a stack of hall passes.
11.The villain placed a rubber fake snake, then snapped up lunch tickets.
12.The villain set off a smelly stink bomb, then pocketed a box of box tops.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Great Schoolhouse Scramble
Culprit: Ian Gomez (Fake Snake · Gold Stars · Left Handed · Sandy Blond · Gold Star Sticker)
- Clue 1 (Rounding): "THE PRANKSTER DOES NOT CARRY LUNCH TICKETS"Round 3,743 to the nearest hundred = 3700 (T) · Round 2,886 to the nearest hundred = 2900 (N) · Round 71 to the nearest ten = 70 (L) · Round 46 to the nearest ten = 50 (S) · Round 735 to the nearest hundred = 700 (E) · Round 227 to the nearest ten = 230 (H) · Round 171 to the nearest ten = 170 (P) · Round 492 to the nearest hundred = 500 (K) · Round 4,283 to the nearest hundred = 4300 (R) · Round 87 to the nearest ten = 90 (U) · Round 1,325 to the nearest hundred = 1300 (Y) · Round 289 to the nearest ten = 290 (A) · Round 111 to the nearest ten = 110 (I) · Round 3,062 to the nearest thousand = 3000 (D) · Round 24 to the nearest ten = 20 (C) · Round 366 to the nearest ten = 370 (O)
- Clue 2 (Addition): "THE WITNESS SAW A LEFT HANDED WRITER"1389 + 1096 = 2485 (T) · 2833 + 2022 = 4855 (S) · 2665 + 3008 = 5673 (H) · 1148 + 1211 = 2359 (E) · 2253 + 4382 = 6635 (W) · 4436 + 3266 = 7702 (L) · 1107 + 1630 = 2737 (D) · 4193 + 2073 = 6266 (R) · 5109 + 3159 = 8268 (A) · 1544 + 2012 = 3556 (I) · 4004 + 3290 = 7294 (N) · 3013 + 4642 = 7655 (F)
- Clue 3 (Subtraction): "THE PRANKSTER GOT DISTRACTED BY A GOLD STAR"8807 - 1178 = 7629 (T) · 4952 - 3530 = 1422 (Y) · 11291 - 4179 = 7112 (R) · 6994 - 2189 = 4805 (L) · 7781 - 2138 = 5643 (D) · 12039 - 3207 = 8832 (K) · 4033 - 1428 = 2605 (A) · 5369 - 3110 = 2259 (E) · 5282 - 621 = 4661 (O) · 7562 - 273 = 7289 (C) · 5589 - 375 = 5214 (P) · 11306 - 2579 = 8727 (I) · 9702 - 4135 = 5567 (N) · 10033 - 4528 = 5505 (G) · 6558 - 1767 = 4791 (H) · 9403 - 4855 = 4548 (S) · 2811 - 680 = 2131 (B)
- Clue 4 (Multiplication facts (1-12)): "SANDY BLOND HAIR WAS CAUGHT ON THE LATCH"7 × 7 = 49 (S) · 11 × 8 = 88 (L) · 9 × 8 = 72 (H) · 10 × 10 = 100 (E) · 3 × 9 = 27 (U) · 11 × 4 = 44 (D) · 4 × 8 = 32 (O) · 5 × 6 = 30 (T) · 10 × 2 = 20 (R) · 7 × 4 = 28 (I) · 3 × 6 = 18 (G) · 9 × 1 = 9 (B) · 3 × 5 = 15 (Y) · 10 × 5 = 50 (A) · 7 × 8 = 56 (W) · 5 × 1 = 5 (C) · 7 × 11 = 77 (N)
- Clue 5 (Division facts (1-12)): surviving statement (box 4) → Ian Gomez9 ÷ 1 = 9 · 10 ÷ 10 = 1 · 8 ÷ 4 = 2 · 60 ÷ 12 = 5 · 84 ÷ 7 = 12 · 33 ÷ 11 = 3 · 80 ÷ 8 = 10 · 63 ÷ 9 = 7 · 99 ÷ 9 = 11 · 24 ÷ 4 = 6 · 96 ÷ 12 = 8
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Rounding, Addition, Subtraction, Multiplication, Division
- Reading level
- grades 3-4
- Theme
- The Great Schoolhouse Scramble — set in Oak Creek Elementary School
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects