🔎 LouvreGrade 4Reading: grades 1-2RoundingAdditionSubtractionMultiplicationDivision

The Louvre Museum Mystery

Oh no! A famous painting is missing from the museum. The golden frame is empty. We must search the rooms of the Louvre. Help the guards find the sneaky Art Snatcher before the morning visitors arrive!

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	Stealth Gear	Bag Spy Gadget	Eye Gear	Hair Style	Museum Trap
Georges	Smoke Paint Bomb	Flashlight Pen	Wears dark glasses	Messy Paint Splashed	Bright Flash Cameras
Vincent	Silent Rope Ladder	Glow Sketchbook	Wears dark glasses	Curly Sunset Red	Sticky Palette Paint
Hugo	Suction Cup Shoes	Grappling Brush	Does not wear glasses	Messy Paint Splashed	Bright Flash Cameras
Rene	Suction Cup Shoes	Squeaky Beret	Wears dark glasses	Spiky Neon Blue	Slippery Floor Wax
Marc	Silent Rope Ladder	Grappling Brush	Wears dark glasses	Spiky Neon Blue	Bright Flash Cameras
Jules	Suction Cup Shoes	Flashlight Pen	Does not wear glasses	Spiky Neon Blue	Sticky Palette Paint
Claude	Smoke Paint Bomb	Grappling Brush	Does not wear glasses	Messy Paint Splashed	Slippery Floor Wax
Jean	Suction Cup Shoes	Glow Sketchbook	Wears dark glasses	Spiky Neon Blue	Slippery Floor Wax
Edgar	Laser Glass Cutter	Magnifying Lens	Wears dark glasses	Curly Sunset Red	Bright Flash Cameras
Camille	Smoke Paint Bomb	Flashlight Pen	Does not wear glasses	Messy Paint Splashed	Bright Flash Cameras
Pierre	Suction Cup Shoes	Magnifying Lens	Wears dark glasses	Messy Paint Splashed	Bright Flash Cameras
Chloe	Smoke Paint Bomb	Magnifying Lens	Wears dark glasses	Spiky Neon Blue	Slippery Floor Wax
Sophie	Smoke Paint Bomb	Magnifying Lens	Wears dark glasses	Curly Sunset Red	Slippery Floor Wax
Paul	Silent Rope Ladder	Magnifying Lens	Wears dark glasses	Spiky Neon Blue	Sticky Palette Paint
Marie	Invisibility Paint	Grappling Brush	Does not wear glasses	Spiky Neon Blue	Sticky Palette Paint
Henri	Silent Rope Ladder	Flashlight Pen	Wears dark glasses	Spiky Neon Blue	Slippery Floor Wax
Odilon	Silent Rope Ladder	Magnifying Lens	Does not wear glasses	Messy Paint Splashed	Bright Flash Cameras
Auguste	Laser Glass Cutter	Flashlight Pen	Wears dark glasses	Spiky Neon Blue	Slippery Floor Wax
Leo	Laser Glass Cutter	Glow Sketchbook	Does not wear glasses	Messy Paint Splashed	Slippery Floor Wax
Pablo	Invisibility Paint	Grappling Brush	Does not wear glasses	Spiky Neon Blue	Slippery Floor Wax
Adele	Laser Glass Cutter	Magnifying Lens	Wears dark glasses	Messy Paint Splashed	Sticky Palette Paint

Clue 1

Rounding

We checked the security radar. It only shows rounded numbers. We rounded the steps to find this 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.

110

2000

110

2000

290

1300

200

9000

3700

9000

110

500

900

1100

110

2000

370

170

900

7000

300

1700

1100

110

Round 110 to the nearest tenT

Round 154 to the nearest hundredD

Round 16 to the nearest tenS

Round 495 to the nearest hundredW

Round 1,718 to the nearest hundredB

Round 290 to the nearest hundredY

Round 28 to the nearest tenE

Round 8,774 to the nearest thousandO

Round 291 to the nearest tenI

Round 1,148 to the nearest hundredR

Round 3,715 to the nearest hundredN

Round 374 to the nearest tenQ

Round 6,785 to the nearest thousandK

Round 1,297 to the nearest hundredF

Round 171 to the nearest tenU

Round 2,405 to the nearest thousandH

Round 941 to the nearest hundredA

0/17 letters found

Clue 2

Addition

Let us count the wet paintbrushes left on the floor. Adding them up gives us a new 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.

6032

3501

6365

5870

4780

6934

8155

2295

8770

7480

4145

4780

6934

6738

3492

2295

4145

3501

4145

7799

6457

6682

2043

3501

8518

7666

6682

6457

6365

8770

2295

8518

3501

1949 + 4083 =W

2266 + 3604 =O

1594 + 1898 =L

2598 + 4882 =K

4628 + 2054 =T

826 + 1469 =A

1193 + 850 =H

2943 + 4723 =P

3083 + 3851 =N

4240 + 2125 =F

3992 + 4163 =D

5014 + 3504 =M

2529 + 5270 =B

3343 + 3114 =Y

4617 + 4153 =R

4486 + 2252 =G

2725 + 2055 =U

1990 + 1511 =E

1645 + 2500 =S

0/19 letters found

Clue 3

Subtraction

The thief dropped some crayons. We take away the broken ones to see what is left!

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

8510

4974

5991

8510

4974

8326

5991

5972

5164

1721

8326

1021

5164

1950

8324

5972

3661

5991

5164

4974

1721

8771

3280

8015

7540

5991

7365

5972

1721

1950

3661

5164

8602 - 92 =T

9293 - 522 =Y

7891 - 2727 =S

10219 - 1895 =N

12013 - 3998 =A

4697 - 1036 =R

12539 - 4999 =X

9746 - 3755 =E

4409 - 2459 =O

9193 - 4219 =H

3767 - 2046 =L

7420 - 1448 =F

9170 - 1805 =D

7534 - 4254 =W

11232 - 2906 =I

4272 - 3251 =P

0/16 letters found

Clue 4

Multiplication facts (1-12)

We see neat rows of clay pots. We multiply the rows to unlock the next secret!

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

132

121

132

5 × 7 =W

7 × 9 =U

12 × 11 =D

8 × 2 =R

11 × 1 =O

11 × 5 =I

2 × 1 =F

11 × 9 =H

10 × 4 =N

11 × 11 =K

4 × 6 =P

1 × 5 =B

8 × 8 =Y

7 × 10 =L

7 × 4 =T

8 × 7 =A

7 × 11 =S

5 × 5 =E

0/18 letters found

Clue 5

Division facts (1-12) — the last clue

We must share the heavy keys equally among the guards. This math shows us the last 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

10 ÷ 2 = ?

36 ÷ 3 = ?

12 ÷ 4 = ?

36 ÷ 4 = ?

40 ÷ 4 = ?

4 ÷ 4 = ?

44 ÷ 11 = ?

70 ÷ 10 = ?

60 ÷ 10 = ?

8 ÷ 4 = ?

64 ÷ 8 = ?

Step 2 — cross out the sentence with each answer

1.The villain cuts the thick glass case, then dashes down the long museum hallway.

2.The villain paints a fake copy of the art, then dashes down the long museum hallway.

3.The villain sneaks past the sleepy night guards, then hides behind a giant marble statue.

4.The villain climbs down from the high skylight, then hides behind a giant marble statue.

5.The villain swipes the golden picture frame, then escapes into the dark sculpture room.

6.The villain paints a fake copy of the art, then escapes into the dark sculpture room.

7.The villain climbs down from the high skylight, then escapes into the dark sculpture room.

8.The villain swipes the golden picture frame, then slides under the laser security beams.

9.The villain paints a fake copy of the art, then runs out into the beautiful Paris night.

10.The villain swipes the golden picture frame, then hides behind a giant marble statue.

11.The villain climbs down from the high skylight, then slides under the laser security beams.

12.The villain cuts the thick glass case, then escapes into the dark sculpture room.

Solve it

Name the culprit

Choose the one suspect left standing.

Answer Key — The Louvre Museum Mystery

Culprit: Jean (Suction Cup Shoes · Glow Sketchbook · Wears dark glasses · Spiky Neon Blue · Slippery Floor Wax)

Clue 1 (Rounding): "THE THIEF DOES NOT WEAR THE SQUEAKY BERET"
Round 110 to the nearest ten = 110 (T) · Round 154 to the nearest hundred = 200 (D) · Round 16 to the nearest ten = 20 (S) · Round 495 to the nearest hundred = 500 (W) · Round 1,718 to the nearest hundred = 1700 (B) · Round 290 to the nearest hundred = 300 (Y) · Round 28 to the nearest ten = 30 (E) · Round 8,774 to the nearest thousand = 9000 (O) · Round 291 to the nearest ten = 290 (I) · Round 1,148 to the nearest hundred = 1100 (R) · Round 3,715 to the nearest hundred = 3700 (N) · Round 374 to the nearest ten = 370 (Q) · Round 6,785 to the nearest thousand = 7000 (K) · Round 1,297 to the nearest hundred = 1300 (F) · Round 171 to the nearest ten = 170 (U) · Round 2,405 to the nearest thousand = 2000 (H) · Round 941 to the nearest hundred = 900 (A)
Clue 2 (Addition): "WE FOUND DARK SUNGLASSES BY THE EMPTY FRAME"
1949 + 4083 = 6032 (W) · 2266 + 3604 = 5870 (O) · 1594 + 1898 = 3492 (L) · 2598 + 4882 = 7480 (K) · 4628 + 2054 = 6682 (T) · 826 + 1469 = 2295 (A) · 1193 + 850 = 2043 (H) · 2943 + 4723 = 7666 (P) · 3083 + 3851 = 6934 (N) · 4240 + 2125 = 6365 (F) · 3992 + 4163 = 8155 (D) · 5014 + 3504 = 8518 (M) · 2529 + 5270 = 7799 (B) · 3343 + 3114 = 6457 (Y) · 4617 + 4153 = 8770 (R) · 4486 + 2252 = 6738 (G) · 2725 + 2055 = 4780 (U) · 1990 + 1511 = 3501 (E) · 1645 + 2500 = 4145 (S)
Clue 3 (Subtraction): "THE THIEF SLIPS ON FRESHLY WAXED FLOORS"
8602 - 92 = 8510 (T) · 9293 - 522 = 8771 (Y) · 7891 - 2727 = 5164 (S) · 10219 - 1895 = 8324 (N) · 12013 - 3998 = 8015 (A) · 4697 - 1036 = 3661 (R) · 12539 - 4999 = 7540 (X) · 9746 - 3755 = 5991 (E) · 4409 - 2459 = 1950 (O) · 9193 - 4219 = 4974 (H) · 3767 - 2046 = 1721 (L) · 7420 - 1448 = 5972 (F) · 9170 - 1805 = 7365 (D) · 7534 - 4254 = 3280 (W) · 11232 - 2906 = 8326 (I) · 4272 - 3251 = 1021 (P)
Clue 4 (Multiplication facts (1-12)): "WE FOUND SPIKY BLUE STRANDS ON THE STATUE"
5 × 7 = 35 (W) · 7 × 9 = 63 (U) · 12 × 11 = 132 (D) · 8 × 2 = 16 (R) · 11 × 1 = 11 (O) · 11 × 5 = 55 (I) · 2 × 1 = 2 (F) · 11 × 9 = 99 (H) · 10 × 4 = 40 (N) · 11 × 11 = 121 (K) · 4 × 6 = 24 (P) · 1 × 5 = 5 (B) · 8 × 8 = 64 (Y) · 7 × 10 = 70 (L) · 7 × 4 = 28 (T) · 8 × 7 = 56 (A) · 7 × 11 = 77 (S) · 5 × 5 = 25 (E)
Clue 5 (Division facts (1-12)): surviving statement (box 11) → Jean
10 ÷ 2 = 5 · 36 ÷ 3 = 12 · 12 ÷ 4 = 3 · 36 ÷ 4 = 9 · 40 ÷ 4 = 10 · 4 ÷ 4 = 1 · 44 ÷ 11 = 4 · 70 ÷ 10 = 7 · 60 ÷ 10 = 6 · 8 ÷ 4 = 2 · 64 ÷ 8 = 8

About this mystery

Grade level: Grade 4 math
Math topics: Rounding, Addition, Subtraction, Multiplication, Division
Reading level: grades 1-2
Theme: The Louvre Museum Mystery — set in The Grand Gallery of the Louvre
Format: Interactive online & printable worksheet with answer key
Solution: One unique, verified culprit among 21 suspects

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