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The Pearl Harbor Ship Mystery

A priceless historic brass bell has been stolen from the main deck of the USS Missouri. The Chief Curator needs your help to search the historic battleship, decode clues, and find which crew member took the relic before the ship opens for visitors.

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	Duty Station	Security Pass	Dominant Hand	Haircut Style	Suspect Weakness
Historian Brooks	Deck Officer	Security Badge	Right-handed	High Fade	Loud Noises
Gunner Thompson	Steam Engineer	Master Keyring	Left-handed	Slick Back	Fear of Heights
Lieutenant Bell	Radio Operator	Security Badge	Right-handed	Slick Back	Fear of Heights
Navigator Fletcher	Deck Officer	Captains Decal	Right-handed	Slick Back	Fear of Heights
Lieutenant Vance	Radar Specialist	Master Keyring	Left-handed	Slick Back	Motion Sickness
Officer Mason	Steam Engineer	Security Badge	Right-handed	High Fade	Loud Noises
Commander Wright	Deck Officer	Captains Decal	Left-handed	Slick Back	Fear of Heights
Engineer Kowalski	Deck Officer	Maintenance Pass	Right-handed	Slick Back	Fear of Heights
Chief Petty Officer Davis	Steam Engineer	Brass Keycard	Right-handed	Slick Back	Loud Noises
Seaman Taylor	Signal Corps	Master Keyring	Right-handed	Slick Back	Loud Noises
Officer Bradley	Radar Specialist	Maintenance Pass	Right-handed	Slick Back	Fear of Heights
Curator Jenkins	Deck Officer	Captains Decal	Left-handed	Slick Back	Loud Noises
Seaman Carter	Radio Operator	Master Keyring	Left-handed	Slick Back	Fear of Heights
Engineer Reynolds	Signal Corps	Maintenance Pass	Right-handed	Slick Back	Loud Noises
Admiral Spruance	Signal Corps	Master Keyring	Right-handed	Slick Back	Fear of Heights
Gunner Henderson	Radio Operator	Brass Keycard	Left-handed	Buzz Cut	Loud Noises
Cadet Murphy	Radar Specialist	Maintenance Pass	Right-handed	High Fade	Fear of Heights
Commander Nimitz	Steam Engineer	Master Keyring	Left-handed	High Fade	Loud Noises
Captain Halsey	Deck Officer	Captains Decal	Left-handed	High Fade	Loud Noises
Sergeant Cooper	Steam Engineer	Maintenance Pass	Left-handed	Buzz Cut	Motion Sickness
Ensign Miller	Radar Specialist	Security Badge	Right-handed	Buzz Cut	Fear of Heights

Clue 1

Addition

We found a logbook in the galley listing the boxes of supplies delivered today. To find out how many crew members were on duty, we must total all the boxes.

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

2398

3879

4879

2398

3879

5287

4879

9198

8061

6586

4879

2288

5556

6586

2398

3879

7881

2502

4879

2398

3879

4879

8363

7881

7868

2398

7881

5287

5556

2288

8061

4879

8363

7881

9852

1498 + 900 =T

3491 + 4872 =C

3004 + 6194 =F

6099 + 3753 =L

3330 + 2226 =N

815 + 1473 =S

1116 + 1386 =V

1849 + 3438 =I

4691 + 3370 =D

3825 + 2761 =O

5404 + 2464 =P

5422 + 2459 =A

2680 + 1199 =H

1499 + 3380 =E

0/14 letters found

Clue 2

Subtraction

The engine room steam pressure gauge dropped suddenly. We need to find the difference between the starting pressure and the ending pressure to see how much steam was lost.

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

3826

5387

1288

4481

5711

4481

8748

1288

5753

3826

5711

4481

1288

8446

3826

5387

1288

5040

7189

5040

5668

5387

3826

5387

2451

5287

8446

5709 - 1883 =T

8539 - 3499 =I

10751 - 3562 =R

7722 - 2335 =H

11698 - 3252 =D

9809 - 1061 =P

8007 - 2720 =N

10396 - 4728 =G

3173 - 1885 =E

6747 - 2266 =S

8917 - 3206 =U

4984 - 2533 =A

8834 - 3081 =C

0/13 letters found

Clue 3

Multiplication facts (1-12)

An observer spotted several rows of signal flags hanging on the main mast. If we multiply the number of rows by the flags in each row, we can unlock the security cabinet.

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

2 × 7 =T

3 × 12 =H

9 × 5 =I

9 × 8 =U

7 × 3 =P

10 × 8 =D

4 × 11 =G

5 × 4 =E

9 × 9 =S

8 × 11 =O

1 × 7 =V

10 × 1 =C

7 × 8 =A

5 × 1 =M

0/14 letters found

Clue 4

Fractions of a number

Only a fraction of the ship's hundred emergency flashlights are currently fully charged. Calculating this exact fraction will help us pinpoint which storage locker was opened.

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

3/6 of 68 =T

1/2 of 28 =D

2/8 of 112 =C

1/3 of 93 =S

4/8 of 34 =L

2/4 of 64 =O

1/3 of 81 =E

1/4 of 160 =A

2/8 of 156 =B

1/10 of 180 =R

1/3 of 105 =H

1/4 of 8 =N

3/6 of 74 =K

3/5 of 25 =I

4/6 of 30 =M

0/15 letters found

Clue 5

Fractions of a number — the last clue

A box of spare brass rivets is partially empty. Finding the exact fraction of the remaining sixty rivets will reveal the combination to the captain's desk drawer.

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

2/10 of 40 = ?

3/6 of 10 = ?

2/10 of 20 = ?

4/10 of 5 = ?

6/10 of 15 = ?

1/3 of 21 = ?

4/8 of 20 = ?

3/10 of 40 = ?

3/10 of 20 = ?

2/10 of 55 = ?

1/5 of 15 = ?

Step 2 — cross out the sentence with each answer

1.The villain bypassed the boiler room lock, then then hurried past the officer quarters.

2.The villain tapped into the radio transmitter, then then escaped via the lower gangway.

3.The villain snuck through the gun turret hatch, then then locked the engine room door.

4.The villain tapped into the radio transmitter, then then locked the engine room door.

5.The villain climbed the teak wood deck, then then hurried past the officer quarters.

6.The villain climbed the teak wood deck, then then locked the engine room door.

7.The villain snuck through the gun turret hatch, then then escaped via the lower gangway.

8.The villain snuck through the gun turret hatch, then then dropped a brass flashlight.

9.The villain disabled the main radar screen, then then escaped via the lower gangway.

10.The villain bypassed the boiler room lock, then then escaped via the lower gangway.

11.The villain bypassed the boiler room lock, then then fled toward the observation deck.

12.The villain climbed the teak wood deck, then then dropped a brass flashlight.

Solve it

Name the culprit

Choose the one suspect left standing.

Answer Key — The Pearl Harbor Ship Mystery

Culprit: Officer Bradley (Radar Specialist · Maintenance Pass · Right-handed · Slick Back · Fear of Heights)

Clue 1 (Addition): "THE THIEF DOES NOT HAVE THE CAPTAINS DECAL"
1498 + 900 = 2398 (T) · 3491 + 4872 = 8363 (C) · 3004 + 6194 = 9198 (F) · 6099 + 3753 = 9852 (L) · 3330 + 2226 = 5556 (N) · 815 + 1473 = 2288 (S) · 1116 + 1386 = 2502 (V) · 1849 + 3438 = 5287 (I) · 4691 + 3370 = 8061 (D) · 3825 + 2761 = 6586 (O) · 5404 + 2464 = 7868 (P) · 5422 + 2459 = 7881 (A) · 2680 + 1199 = 3879 (H) · 1499 + 3380 = 4879 (E)
Clue 2 (Subtraction): "THE SUSPECT USED THEIR RIGHT HAND"
5709 - 1883 = 3826 (T) · 8539 - 3499 = 5040 (I) · 10751 - 3562 = 7189 (R) · 7722 - 2335 = 5387 (H) · 11698 - 3252 = 8446 (D) · 9809 - 1061 = 8748 (P) · 8007 - 2720 = 5287 (N) · 10396 - 4728 = 5668 (G) · 3173 - 1885 = 1288 (E) · 6747 - 2266 = 4481 (S) · 8917 - 3206 = 5711 (U) · 4984 - 2533 = 2451 (A) · 8834 - 3081 = 5753 (C)
Clue 3 (Multiplication facts (1-12)): "THE SUSPECT AVOIDED THE HIGH MAST"
2 × 7 = 14 (T) · 3 × 12 = 36 (H) · 9 × 5 = 45 (I) · 9 × 8 = 72 (U) · 7 × 3 = 21 (P) · 10 × 8 = 80 (D) · 4 × 11 = 44 (G) · 5 × 4 = 20 (E) · 9 × 9 = 81 (S) · 8 × 11 = 88 (O) · 1 × 7 = 7 (V) · 10 × 1 = 10 (C) · 7 × 8 = 56 (A) · 5 × 1 = 5 (M)
Clue 4 (Fractions of a number): "THE SCENE HAD COMBED SLICK HAIR"
3/6 of 68 = 34 (T) · 1/2 of 28 = 14 (D) · 2/8 of 112 = 28 (C) · 1/3 of 93 = 31 (S) · 4/8 of 34 = 17 (L) · 2/4 of 64 = 32 (O) · 1/3 of 81 = 27 (E) · 1/4 of 160 = 40 (A) · 2/8 of 156 = 39 (B) · 1/10 of 180 = 18 (R) · 1/3 of 105 = 35 (H) · 1/4 of 8 = 2 (N) · 3/6 of 74 = 37 (K) · 3/5 of 25 = 15 (I) · 4/6 of 30 = 20 (M)
Clue 5 (Fractions of a number): surviving statement (box 1) → Officer Bradley
2/10 of 40 = 8 · 3/6 of 10 = 5 · 2/10 of 20 = 4 · 4/10 of 5 = 2 · 6/10 of 15 = 9 · 1/3 of 21 = 7 · 4/8 of 20 = 10 · 3/10 of 40 = 12 · 3/10 of 20 = 6 · 2/10 of 55 = 11 · 1/5 of 15 = 3

About this mystery

Grade level: Grade 5 math
Math topics: Addition, Subtraction, Multiplication, Fractions of a number
Reading level: grades 5-6
Theme: The Pearl Harbor Ship Mystery — set in The historic battleship USS Missouri, anchored in Pearl Harbor
Format: Interactive online & printable worksheet with answer key
Solution: One unique, verified culprit among 21 suspects

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