Math Mysteries
🔎 PornGrade 3Reading: grades 3-4RoundingAdditionSubtractionMultiplicationDivision

The Mystery of the Starlight Bandit

The Starlight Cinema is in trouble! Someone is sneaking into the theaters, mixing up the movie reels, and eating all the snacks. The Theater Manager needs your help to find the Popcorn Bandit before the big evening show starts!

Suspects

Possible suspects

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

21 of 21 still in play
NameFavorite Movie GenreStolen SnackSuspect RoleHeadwearWeakness
Lucy LobbyComedyGummy BearsActressRed CapLoud Sneeze
Ella EditorActionSour CandyActressGolden CrownSticky Floor
Penny PopcornCartoonSoda PopActressGolden CrownBright Flashlight
Ruby ReelSci-FiButtered PopcornActressGolden CrownSticky Floor
Finn FilmComedyButtered PopcornActorRed CapLoud Sneeze
Benny ButterSci-FiButtered PopcornActressRed CapBright Flashlight
Bella BoxofficeComedySour CandyActorGolden CrownBright Flashlight
Leo LightsSci-FiButtered PopcornActressRed CapSticky Floor
Zoe ZoomCartoonButtered PopcornActressGolden CrownLoud Sneeze
Molly MusicSci-FiNacho CheeseActressGolden CrownSticky Floor
Mia MovieComedySour CandyActressGolden CrownBright Flashlight
Toby TicketCartoonGummy BearsActressGolden CrownBright Flashlight
Clara CandyMysteryGummy BearsActorRed CapLoud Sneeze
Danny DramaComedyNacho CheeseActorGolden CrownBright Flashlight
Oliver OscarMysteryNacho CheeseActressRed CapLoud Sneeze
Peter PosterMysterySoda PopActressGolden CrownBright Flashlight
Sammy ScreenComedyGummy BearsActressVelvet BeretSticky Floor
Noah NachoMysterySour CandyActressRed CapBright Flashlight
Grace GlamourCartoonNacho CheeseActressGolden CrownBright Flashlight
Charlie CameraComedySoda PopActorVelvet BeretLoud Sneeze
Max MatineeActionSoda PopActorGolden CrownBright Flashlight
Clue 1

Rounding

We check the popcorn machine digital counter. It only shows rounded numbers, but it helps us rule out one snack!

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
2000
3000
4000
9000
20
800
400
80
T
2000
400
500
4000
70
800
500
T
2000
4000
20
T
2000
600
6000
50
50
300
9000
4000
20
200
70
Round 2,492 to the nearest thousandT
Round 644 to the nearest hundredG
Round 8,667 to the nearest thousandB
Round 21 to the nearest tenA
Round 6,430 to the nearest thousandU
Round 4,252 to the nearest thousandE
Round 797 to the nearest hundredN
Round 2,873 to the nearest thousandH
Round 52 to the nearest tenM
Round 370 to the nearest hundredD
Round 198 to the nearest hundredR
Round 79 to the nearest tenI
Round 512 to the nearest hundredO
Round 74 to the nearest tenS
Round 307 to the nearest hundredY
0/15 letters found
Clue 2

Addition

We count the spilled movie tickets on the lobby floor. Adding them all up tells us if the villain is an actor or actress.

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
811
435
986
861
866
T
811
235
986
925
925
423
986
898
T
811
861
676
423
649
T
811
T
811
986
235
297
435
861
649
235
644
649
877
426 + 385 =T
388 + 473 =A
220 + 215 =H
286 + 137 =L
275 + 602 =N
542 + 444 =E
491 + 375 =C
381 + 268 =I
371 + 305 =G
479 + 446 =S
223 + 421 =P
400 + 498 =F
131 + 104 =R
156 + 141 =Y
0/14 letters found
Clue 3

Subtraction

Some soda cups are missing from the snack bar. Subtracting the left-over cups from the starting box reveals a clue about their weakness.

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
579
846
149
309
308
195
702
610
874
A
579
796
195
874
309
308
195
702
796
220
A
579
149
336
796
702
195
336
786
A
579
821
A
579
843
742 - 163 =A
728 - 392 =E
831 - 45 =M
1131 - 335 =S
269 - 49 =C
401 - 92 =I
926 - 224 =T
473 - 165 =G
296 - 101 =H
693 - 83 =F
416 - 267 =R
1238 - 392 =B
1124 - 250 =L
888 - 45 =Y
880 - 59 =W
0/15 letters found
Clue 4

Multiplication facts (1-12)

We look at the rows of theater seats. Multiplying the rows by the seats in each row helps us find a clue about what they wear on their head.

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
66
16
110
144
36
33
88
110
21
3
56
36
2
21
4
16
22
21
110
4
22
21
88
90
56
42
11 × 6 =T
7 × 8 =R
6 × 6 =O
3 × 11 =L
6 × 7 =K
11 × 2 =I
10 × 9 =A
10 × 11 =E
8 × 11 =D
12 × 12 =G
8 × 2 =H
2 × 1 =W
3 × 1 =C
7 × 3 =N
2 × 2 =S
0/15 letters found
Clue 5

Division facts (1-12) — the last clue

We share a bag of giant pretzels evenly among the detectives. Dividing the pretzels gives us the final clue we need.

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
30 ÷ 10 = ?
7 ÷ 1 = ?
40 ÷ 8 = ?
36 ÷ 4 = ?
36 ÷ 9 = ?
22 ÷ 2 = ?
4 ÷ 2 = ?
72 ÷ 12 = ?
3 ÷ 3 = ?
30 ÷ 3 = ?
108 ÷ 9 = ?
Step 2 — cross out the sentence with each answer
1.The villain tangles the cartoon reel, then steals the bag of gummy bears.
2.The villain swaps the sci-fi movie reel, then gobbles up the buttered popcorn.
3.The villain tangles the cartoon reel, then spills the hot nacho cheese.
4.The villain swaps the sci-fi movie reel, then drinks the fizzy soda pop.
5.The villain messes up the comedy film, then munchies on the sour candy.
6.The villain swaps the sci-fi movie reel, then munchies on the sour candy.
7.The villain hides the mystery movie, then drinks the fizzy soda pop.
8.The villain tangles the cartoon reel, then drinks the fizzy soda pop.
9.The villain scrambles the action movie, then steals the bag of gummy bears.
10.The villain hides the mystery movie, then steals the bag of gummy bears.
11.The villain hides the mystery movie, then munchies on the sour candy.
12.The villain messes up the comedy film, then drinks the fizzy soda pop.
Solve it

Name the culprit

Choose the one suspect left standing.

About this mystery

Grade level
Grade 3 math
Math topics
Rounding, Addition, Subtraction, Multiplication, Division
Reading level
grades 3-4
Theme
The Mystery of the Starlight Bandit — set in The Starlight Cinema
Format
Interactive online & printable worksheet with answer key
Solution
One unique, verified culprit among 21 suspects
The Mystery of the Starlight Bandit · Grade 3 Math Mystery — Math Mysteries