Grade 4Reading: grades 3-4RoundingAdditionSubtractionMultiplicationDivision

The Golden Compass Caper

Someone snuck into the Chief Archeologist's tent and took the legendary Golden Compass! The camp is full of suspect adventurers. Follow the clues, solve the math problems, and find the Rogue Explorer before they escape into the deep jungle!

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	Gear Choice	Gadget Companion	Dominant Hand	Headwear Disguise	Camp Phobia
Alex	pocket compass	walkie talkie	right handed	green camo bandanna	spider webs
Zoe	glider wing	pet monkey	left handed	muddy safari hat	banana peels
Ruby	jungle machete	pet monkey	right handed	muddy safari hat	banana peels
Finn	jungle machete	walkie talkie	left handed	blue baseball cap	spider webs
Cleo	jungle machete	smoke bomb	left handed	muddy safari hat	shiny mirrors
Wyatt	grappling hook	spy glass	right handed	green camo bandanna	spider webs
Jake	glider wing	walkie talkie	right handed	blue baseball cap	spider webs
Gemma	rope dart	walkie talkie	left handed	muddy safari hat	spider webs
Amy	rope dart	smoke bomb	left handed	green camo bandanna	banana peels
Ben	glider wing	smoke bomb	left handed	blue baseball cap	banana peels
Kira	jungle machete	walkie talkie	right handed	muddy safari hat	shiny mirrors
Lara	glider wing	spy glass	right handed	blue baseball cap	shiny mirrors
Ollie	jungle machete	spy glass	left handed	muddy safari hat	banana peels
Sam	pocket compass	walkie talkie	right handed	blue baseball cap	shiny mirrors
Mia	pocket compass	walkie talkie	left handed	green camo bandanna	spider webs
Toby	rope dart	pet monkey	left handed	muddy safari hat	spider webs
Gabe	grappling hook	smoke bomb	right handed	muddy safari hat	spider webs
Penny	jungle machete	walkie talkie	right handed	muddy safari hat	spider webs
Ned	jungle machete	flash light	right handed	muddy safari hat	spider webs
May	rope dart	pet monkey	right handed	muddy safari hat	spider webs
Max	glider wing	spy glass	right handed	muddy safari hat	spider webs

Clue 1

Rounding

The camp radar screen only shows rounded distances to keep the map clear. Round these numbers to find where the thief fled.

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

300

2900

300

2300

7000

300

700

1700

370

700

300

700

3700

430

300

3000

3700

3000

700

Round 49 to the nearest tenT

Round 3,696 to the nearest hundredM

Round 1,675 to the nearest hundredN

Round 27 to the nearest tenO

Round 433 to the nearest tenK

Round 90 to the nearest tenH

Round 704 to the nearest hundredS

Round 314 to the nearest hundredE

Round 3,073 to the nearest thousandB

Round 2,928 to the nearest hundredI

Round 7,068 to the nearest thousandD

Round 2,271 to the nearest hundredF

Round 368 to the nearest tenU

0/13 letters found

Clue 2

Addition

We need to add up all the heavy climbing supplies left in the crates to see who packed light.

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

8418

8686

9378

9128

6860

9451

8686

8418

8686

4880

7609

7931

9378

7931

8418

8686

6860

9378

5662

2528

7874

9378

7931

4880

9128

6860

9451

8686

8418

9451

4236

6410

5278

9378

2849 + 5569 =T

2999 + 4932 =D

1193 + 1335 =U

3338 + 4536 =S

5554 + 3824 =E

3830 + 5621 =G

4907 + 3779 =H

4197 + 2663 =I

3538 + 1740 =V

1862 + 3800 =F

5113 + 4015 =R

2596 + 5013 =N

2669 + 3741 =O

2074 + 2162 =L

3080 + 1800 =A

0/15 letters found

Clue 3

Subtraction

A troop of monkeys swiped some of our gear! Subtract the missing items from our total count to see what remains.

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

5000

3441

3777

5000

3441

3150

3777

1731

8909

3128

2368

3128

1658

3128

6836

1731

8909

5850

7452

8664

4534

3150

4612

3777

8909

1658

3777

7764

8664

6014 - 1014 =T

6131 - 2354 =E

12230 - 4466 =B

7661 - 4533 =A

9207 - 1755 =M

6142 - 1608 =P

7387 - 1537 =O

5764 - 3396 =N

4338 - 897 =H

5980 - 4249 =F

4847 - 235 =D

11834 - 3170 =S

10710 - 1801 =R

6145 - 2995 =I

10146 - 3310 =Y

6438 - 4780 =W

0/16 letters found

Clue 4

Multiplication facts (1-12)

The survival bars are packed in neat rows inside the pantry. Multiply the rows to see how many snacks we have 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.

108

110

1 × 3 =M

10 × 11 =N

7 × 7 =H

6 × 7 =D

7 × 12 =W

6 × 2 =O

12 × 2 =S

1 × 7 =F

9 × 7 =U

9 × 5 =R

11 × 1 =I

9 × 12 =T

9 × 9 =A

0/13 letters found

Clue 5

Division facts (1-12) — the last clue

We have to divide the rescue radios equally among our search teams before we head into the thick trees.

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 ÷ 3 = ?

132 ÷ 11 = ?

28 ÷ 7 = ?

24 ÷ 12 = ?

16 ÷ 2 = ?

7 ÷ 1 = ?

10 ÷ 10 = ?

10 ÷ 2 = ?

42 ÷ 7 = ?

20 ÷ 2 = ?

55 ÷ 5 = ?

Step 2 — cross out the sentence with each answer

1.The villain shot a grappling hook, then chattered on a walkie talkie.

2.The villain swung on a rope dart, then peered through a spy glass.

3.The villain slashed a jungle machete, then shined a bright flash light.

4.The villain slashed a jungle machete, then chattered on a walkie talkie.

5.The villain soared on a glider wing, then chattered on a walkie talkie.

6.The villain swung on a rope dart, then chattered on a walkie talkie.

7.The villain soared on a glider wing, then distracted guards with a pet monkey.

8.The villain checked a pocket compass, then distracted guards with a pet monkey.

9.The villain swung on a rope dart, then distracted guards with a pet monkey.

10.The villain shot a grappling hook, then peered through a spy glass.

11.The villain soared on a glider wing, then shined a bright flash light.

12.The villain soared on a glider wing, then peered through a spy glass.

Solve it

Name the culprit

Choose the one suspect left standing.

Answer Key — The Golden Compass Caper

Culprit: May (rope dart · pet monkey · right handed · muddy safari hat · spider webs)

Clue 1 (Rounding): "THE THIEF DOES NOT USE SMOKE BOMBS"
Round 49 to the nearest ten = 50 (T) · Round 3,696 to the nearest hundred = 3700 (M) · Round 1,675 to the nearest hundred = 1700 (N) · Round 27 to the nearest ten = 30 (O) · Round 433 to the nearest ten = 430 (K) · Round 90 to the nearest ten = 90 (H) · Round 704 to the nearest hundred = 700 (S) · Round 314 to the nearest hundred = 300 (E) · Round 3,073 to the nearest thousand = 3000 (B) · Round 2,928 to the nearest hundred = 2900 (I) · Round 7,068 to the nearest thousand = 7000 (D) · Round 2,271 to the nearest hundred = 2300 (F) · Round 368 to the nearest ten = 370 (U)
Clue 2 (Addition): "THE RIGHT HANDED THIEF USED A RIGHT GLOVE"
2849 + 5569 = 8418 (T) · 2999 + 4932 = 7931 (D) · 1193 + 1335 = 2528 (U) · 3338 + 4536 = 7874 (S) · 5554 + 3824 = 9378 (E) · 3830 + 5621 = 9451 (G) · 4907 + 3779 = 8686 (H) · 4197 + 2663 = 6860 (I) · 3538 + 1740 = 5278 (V) · 1862 + 3800 = 5662 (F) · 5113 + 4015 = 9128 (R) · 2596 + 5013 = 7609 (N) · 2669 + 3741 = 6410 (O) · 2074 + 2162 = 4236 (L) · 3080 + 1800 = 4880 (A)
Clue 3 (Subtraction): "THE THIEF RAN AWAY FROM SPIDER WEBS"
6014 - 1014 = 5000 (T) · 6131 - 2354 = 3777 (E) · 12230 - 4466 = 7764 (B) · 7661 - 4533 = 3128 (A) · 9207 - 1755 = 7452 (M) · 6142 - 1608 = 4534 (P) · 7387 - 1537 = 5850 (O) · 5764 - 3396 = 2368 (N) · 4338 - 897 = 3441 (H) · 5980 - 4249 = 1731 (F) · 4847 - 235 = 4612 (D) · 11834 - 3170 = 8664 (S) · 10710 - 1801 = 8909 (R) · 6145 - 2995 = 3150 (I) · 10146 - 3310 = 6836 (Y) · 6438 - 4780 = 1658 (W)
Clue 4 (Multiplication facts (1-12)): "MUD FROM A SAFARI HAT WAS FOUND"
1 × 3 = 3 (M) · 10 × 11 = 110 (N) · 7 × 7 = 49 (H) · 6 × 7 = 42 (D) · 7 × 12 = 84 (W) · 6 × 2 = 12 (O) · 12 × 2 = 24 (S) · 1 × 7 = 7 (F) · 9 × 7 = 63 (U) · 9 × 5 = 45 (R) · 11 × 1 = 11 (I) · 9 × 12 = 108 (T) · 9 × 9 = 81 (A)
Clue 5 (Division facts (1-12)): surviving statement (box 9) → May
9 ÷ 3 = 3 · 132 ÷ 11 = 12 · 28 ÷ 7 = 4 · 24 ÷ 12 = 2 · 16 ÷ 2 = 8 · 7 ÷ 1 = 7 · 10 ÷ 10 = 1 · 10 ÷ 2 = 5 · 42 ÷ 7 = 6 · 20 ÷ 2 = 10 · 55 ÷ 5 = 11

About this mystery

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

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