Grade 3Reading: grades 3-4AdditionRoundingSubtractionMultiplicationDivision

The Lost Sapphire of Jungle Peak

During an expedition on Jungle Peak Island, someone sneaked into camp and stole the ancient Sapphire Map! Use your detective skills to figure out who did it.

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	Special Gear	Animal Companion	Dominant Hand	Hat Style	Weakness
Scout Finn	Map Compass	Owl	Right Handed	Brown Felt	Bright Lights
Ranger Ivy	Hook Claw	Owl	Right Handed	Olive Green	Cold Water
Scout Ben	Map Compass	Fox	Left Handed	Brown Felt	Bright Lights
Hiker Nina	Solar Torch	Owl	Right Handed	Tan Straw	Bright Lights
Nav Rex	Rope Launcher	Owl	Left Handed	Brown Felt	Bright Lights
Adventurer Eli	Rope Launcher	Monkey	Right Handed	Tan Straw	Bright Lights
Guide Dax	Hook Claw	Monkey	Right Handed	Brown Felt	Cold Water
Tracker Zoe	Solar Torch	Fox	Left Handed	Brown Felt	Bright Lights
Climber Max	Rope Launcher	Fox	Right Handed	Brown Felt	Cold Water
Dr Chloe	Solar Torch	Owl	Left Handed	Tan Straw	Bright Lights
Guide Otis	Solar Torch	Monkey	Left Handed	Brown Felt	Cold Water
Pilot Tess	Smoke Bomb	Parrot	Right Handed	Brown Felt	Bright Lights
Professor Hugh	Smoke Bomb	Parrot	Right Handed	Brown Felt	Loud Drums
Captain Leo	Solar Torch	Owl	Left Handed	Olive Green	Cold Water
Ranger Sam	Smoke Bomb	Owl	Left Handed	Brown Felt	Bright Lights
Nav Jack	Solar Torch	Monkey	Right Handed	Olive Green	Bright Lights
Pilot Nora	Rope Launcher	Lizard	Right Handed	Brown Felt	Cold Water
Professor Ray	Rope Launcher	Owl	Left Handed	Brown Felt	Loud Drums
Hiker Ruby	Solar Torch	Fox	Right Handed	Olive Green	Cold Water
Climber Tara	Hook Claw	Lizard	Left Handed	Brown Felt	Bright Lights
Agent Luke	Map Compass	Fox	Left Handed	Tan Straw	Cold Water

Clue 1

Addition

We counted all the ancient gold coins found in the supply tent to uncover our 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.

458

957

533

925

429

809

899

458

533

983

537

476

582

476

931

899

458

957

429

635

533

429

228

582

765

429

537

476

241 + 217 =T

559 + 372 =N

376 + 607 =U

200 + 333 =E

399 + 236 =V

321 + 604 =S

384 + 198 =I

553 + 256 =B

146 + 283 =A

285 + 191 =D

429 + 528 =H

102 + 126 =L

433 + 466 =O

319 + 218 =R

442 + 323 =Z

0/15 letters found

Clue 2

Rounding

The expedition radar gives distances rounded to the nearest ten meters.

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

8000

300

900

200

4000

200

3000

900

8000

300

900

200

6000

4000

900

500

8000

300

500

800

6000

4000

800

600

7000

Round 7,877 to the nearest thousandT

Round 67 to the nearest tenV

Round 6,969 to the nearest thousandK

Round 641 to the nearest hundredC

Round 38 to the nearest tenN

Round 507 to the nearest hundredF

Round 4,398 to the nearest thousandL

Round 21 to the nearest tenA

Round 287 to the nearest hundredH

Round 933 to the nearest hundredE

Round 78 to the nearest tenD

Round 5,890 to the nearest thousandR

Round 64 to the nearest tenS

Round 229 to the nearest hundredI

Round 3,314 to the nearest thousandU

Round 762 to the nearest hundredO

0/16 letters found

Clue 3

Subtraction

We calculated how many trail maps remained after the sudden storm destroyed some.

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

466

620

136

551

185

575

630

185

694

181

620

185

136

417

630

887

630

591

581

571

602

567

775

571

185

437

620

466

575

185

437

620

466

181

678 - 212 =T

509 - 72 =G

609 - 18 =Y

826 - 275 =V

589 - 14 =L

352 - 216 =E

748 - 181 =M

584 - 167 =D

558 - 377 =S

1165 - 278 =W

641 - 39 =O

811 - 191 =H

708 - 14 =N

534 - 349 =I

729 - 99 =A

863 - 88 =B

907 - 326 =F

686 - 115 =R

0/18 letters found

Clue 4

Multiplication facts (1-12)

We checked the crate inventory arranged in equal rows and columns inside the camp.

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

120

1 × 7 =T

3 × 9 =W

5 × 7 =I

1 × 1 =F

12 × 10 =D

12 × 7 =U

10 × 5 =N

3 × 6 =A

5 × 3 =H

11 × 7 =M

3 × 11 =L

2 × 1 =R

10 × 2 =C

5 × 5 =B

1 × 11 =E

6 × 5 =O

0/16 letters found

Clue 5

Division facts (1-12) — the last clue

We divided the remaining emergency rations equally among the scout teams.

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 ÷ 1 = ?

80 ÷ 8 = ?

18 ÷ 3 = ?

32 ÷ 4 = ?

10 ÷ 10 = ?

32 ÷ 8 = ?

77 ÷ 7 = ?

10 ÷ 5 = ?

70 ÷ 10 = ?

3 ÷ 1 = ?

18 ÷ 2 = ?

Step 2 — cross out the sentence with each answer

1.The villain swung with the hook claw, then petted a fox.

2.The villain dropped a smoke bomb, then petted a fox.

3.The villain checked the map compass, then called an owl.

4.The villain checked the map compass, then signaled a lizard.

5.The villain dropped a smoke bomb, then called an owl.

6.The villain lit the solar torch, then petted a fox.

7.The villain swung with the hook claw, then called an owl.

8.The villain lit the solar torch, then called an owl.

9.The villain fired the rope launcher, then whistled to a parrot.

10.The villain checked the map compass, then petted a fox.

11.The villain checked the map compass, then whistled to a parrot.

12.The villain fired the rope launcher, then called an owl.

Solve it

Name the culprit

Choose the one suspect left standing.

Answer Key — The Lost Sapphire of Jungle Peak

Culprit: Nav Rex (Rope Launcher · Owl · Left Handed · Brown Felt · Bright Lights)

Clue 1 (Addition): "THE SABOTEUR DID NOT HAVE A LIZARD"
241 + 217 = 458 (T) · 559 + 372 = 931 (N) · 376 + 607 = 983 (U) · 200 + 333 = 533 (E) · 399 + 236 = 635 (V) · 321 + 604 = 925 (S) · 384 + 198 = 582 (I) · 553 + 256 = 809 (B) · 146 + 283 = 429 (A) · 285 + 191 = 476 (D) · 429 + 528 = 957 (H) · 102 + 126 = 228 (L) · 433 + 466 = 899 (O) · 319 + 218 = 537 (R) · 442 + 323 = 765 (Z)
Clue 2 (Rounding): "THE VILLAIN USED THEIR LEFT HAND FOR LOCKS"
Round 7,877 to the nearest thousand = 8000 (T) · Round 67 to the nearest ten = 70 (V) · Round 6,969 to the nearest thousand = 7000 (K) · Round 641 to the nearest hundred = 600 (C) · Round 38 to the nearest ten = 40 (N) · Round 507 to the nearest hundred = 500 (F) · Round 4,398 to the nearest thousand = 4000 (L) · Round 21 to the nearest ten = 20 (A) · Round 287 to the nearest hundred = 300 (H) · Round 933 to the nearest hundred = 900 (E) · Round 78 to the nearest ten = 80 (D) · Round 5,890 to the nearest thousand = 6000 (R) · Round 64 to the nearest ten = 60 (S) · Round 229 to the nearest hundred = 200 (I) · Round 3,314 to the nearest thousand = 3000 (U) · Round 762 to the nearest hundred = 800 (O)
Clue 3 (Subtraction): "THE VILLAIN SHIED AWAY FROM BRIGHT LIGHTS"
678 - 212 = 466 (T) · 509 - 72 = 437 (G) · 609 - 18 = 591 (Y) · 826 - 275 = 551 (V) · 589 - 14 = 575 (L) · 352 - 216 = 136 (E) · 748 - 181 = 567 (M) · 584 - 167 = 417 (D) · 558 - 377 = 181 (S) · 1165 - 278 = 887 (W) · 641 - 39 = 602 (O) · 811 - 191 = 620 (H) · 708 - 14 = 694 (N) · 534 - 349 = 185 (I) · 729 - 99 = 630 (A) · 863 - 88 = 775 (B) · 907 - 326 = 581 (F) · 686 - 115 = 571 (R)
Clue 4 (Multiplication facts (1-12)): "THE TEAM FOUND FABRIC FROM A BROWN FELT HAT"
1 × 7 = 7 (T) · 3 × 9 = 27 (W) · 5 × 7 = 35 (I) · 1 × 1 = 1 (F) · 12 × 10 = 120 (D) · 12 × 7 = 84 (U) · 10 × 5 = 50 (N) · 3 × 6 = 18 (A) · 5 × 3 = 15 (H) · 11 × 7 = 77 (M) · 3 × 11 = 33 (L) · 2 × 1 = 2 (R) · 10 × 2 = 20 (C) · 5 × 5 = 25 (B) · 1 × 11 = 11 (E) · 6 × 5 = 30 (O)
Clue 5 (Division facts (1-12)): surviving statement (box 12) → Nav Rex
5 ÷ 1 = 5 · 80 ÷ 8 = 10 · 18 ÷ 3 = 6 · 32 ÷ 4 = 8 · 10 ÷ 10 = 1 · 32 ÷ 8 = 4 · 77 ÷ 7 = 11 · 10 ÷ 5 = 2 · 70 ÷ 10 = 7 · 3 ÷ 1 = 3 · 18 ÷ 2 = 9

About this mystery

Grade level: Grade 3 math
Math topics: Addition, Rounding, Subtraction, Multiplication, Division
Reading level: grades 3-4
Theme: The Lost Sapphire of Jungle Peak — set in Jungle Peak Island
Format: Interactive online & printable worksheet with answer key
Solution: One unique, verified culprit among 21 suspects

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