Grade 4Reading: grades 5-6AdditionRoundingSubtractionMultiplicationDivision

Mystery of the Sunken Sun Stone

Someone broke into the inner vault of the Temple of the Golden Jaguar and snatched the ancient Sun Stone! Dr Aris Thorne needs your detective skills to decode clues, analyze trail markers, and unmask the thief before they flee the 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	Gadget	Accessory	Helmet Color	Weakness
Dash Wilder	Night Goggles	Pocket Drill	Compass Watch	Blue Helmet	Loud Whistle
Zoe Thorne	Glider Wings	Pocket Drill	Solar Badge	Silver Helmet	Bright Flash
Hugo Vance	Smoke Bombs	Stealth Camo	Solar Badge	Gold Helmet	Bright Flash
Zack Vance	Smoke Bombs	Turbo Jetpack	Solar Badge	Blue Helmet	Bright Flash
Kobe Brooks	Smoke Bombs	Armored Buggy	Solar Badge	Blue Helmet	Bright Flash
Talia Frost	Grappling Hook	Turbo Jetpack	Solar Badge	Blue Helmet	Bright Flash
Gabe Mercer	Grappling Hook	Turbo Jetpack	Compass Watch	Blue Helmet	Bright Flash
Sienna West	Night Goggles	Stealth Camo	Solar Badge	Gold Helmet	Loud Whistle
Sam Rivers	Sound Blaster	Armored Buggy	Compass Watch	Gold Helmet	Sticky Foam
Mason Reed	Grappling Hook	Stealth Camo	Compass Watch	Silver Helmet	Bright Flash
Maya Lin	Glider Wings	Turbo Jetpack	Compass Watch	Gold Helmet	Bright Flash
Ruby Sparks	Night Goggles	Hover Drone	Solar Badge	Blue Helmet	Bright Flash
Nora Stone	Night Goggles	Turbo Jetpack	Compass Watch	Silver Helmet	Bright Flash
Elena Cruz	Grappling Hook	Hover Drone	Solar Badge	Blue Helmet	Bright Flash
Professor Bram	Night Goggles	Stealth Camo	Solar Badge	Blue Helmet	Loud Whistle
Lila Vance	Grappling Hook	Stealth Camo	Solar Badge	Silver Helmet	Sticky Foam
Leo Drake	Glider Wings	Turbo Jetpack	Solar Badge	Silver Helmet	Bright Flash
Felix Sterling	Smoke Bombs	Pocket Drill	Solar Badge	Gold Helmet	Bright Flash
Ivy Chen	Glider Wings	Pocket Drill	Solar Badge	Blue Helmet	Sticky Foam
Oscar Finch	Glider Wings	Stealth Camo	Compass Watch	Gold Helmet	Sticky Foam
Chloe Park	Night Goggles	Stealth Camo	Compass Watch	Blue Helmet	Sticky Foam

Clue 1

Addition

We need to tally up all the jungle trail markers discovered by our scouts today.

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

6475

7315

2341

3413

2864

5243

4476

2864

3568

4145

6981

2341

8605

3568

6981

6475

6840

8605

2341

6475

7315

2341

4476

9750

8794

6981

9750

2341

4145

6925

6840

9728

6424

2231 + 4244 =T

1460 + 2108 =N

3187 + 5607 =M

3292 + 6436 =G

1603 + 1810 =V

5670 + 4080 =R

907 + 1957 =I

2614 + 4226 =U

1043 + 1298 =E

1994 + 2151 =D

4142 + 2839 =O

4898 + 2417 =H

2707 + 1769 =A

3252 + 3172 =Y

2119 + 3124 =L

2191 + 4734 =B

5203 + 3402 =S

0/17 letters found

Clue 2

Rounding

The sensor array on the expedition helicopter only displays rounded distance readings.

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

3700

2000

1300

290

3700

2300

230

3700

700

500

4300

3700

2000

700

2300

1300

9000

500

700

430

500

3700

2300

1100

1700

500

300

3700

110

290

1100

Round 3,682 to the nearest hundredA

Round 2,315 to the nearest hundredR

Round 109 to the nearest tenU

Round 4,260 to the nearest hundredW

Round 1,074 to the nearest hundredT

Round 433 to the nearest tenN

Round 2,086 to the nearest thousandS

Round 50 to the nearest tenG

Round 510 to the nearest hundredE

Round 230 to the nearest tenB

Round 1,252 to the nearest hundredO

Round 1,684 to the nearest hundredH

Round 715 to the nearest hundredD

Round 290 to the nearest tenL

Round 257 to the nearest hundredV

Round 9,067 to the nearest thousandP

0/16 letters found

Clue 3

Subtraction

Let us calculate how many supplies remain in the temple storehouse after the raid.

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

5845

6460

4074

5845

6460

6166

4074

7143

4223

2111

8512

5845

7138

7537

4074

4291

7943

8606

2111

7943

3256

6166

5520

6460

5845

7143

7988

2111

8512

6460

5862 - 17 =T

9903 - 2366 =N

7990 - 2470 =G

11884 - 3278 =Y

11964 - 4021 =B

6482 - 2259 =W

7526 - 4270 =R

9294 - 1306 =L

9224 - 2764 =H

7330 - 1164 =I

11805 - 4667 =U

12762 - 4250 =S

8335 - 1192 =F

5310 - 3199 =A

6273 - 2199 =E

7478 - 3187 =D

0/16 letters found

Clue 4

Multiplication facts (1-12)

The team found organized rows of artifact crates stacked neatly in the jungle 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.

100

7 × 1 =B

3 × 3 =I

7 × 9 =M

1 × 8 =N

5 × 7 =L

5 × 10 =E

11 × 9 =C

10 × 10 =R

4 × 6 =A

6 × 9 =F

9 × 9 =O

11 × 1 =G

11 × 6 =S

4 × 8 =U

4 × 7 =H

5 × 4 =P

9 × 3 =T

0/17 letters found

Clue 5

Division facts (1-12) — the last clue

We must divide the remaining expedition rations equally among all field researchers.

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

6 ÷ 3 = ?

7 ÷ 1 = ?

48 ÷ 12 = ?

21 ÷ 7 = ?

12 ÷ 1 = ?

30 ÷ 6 = ?

110 ÷ 11 = ?

4 ÷ 4 = ?

22 ÷ 2 = ?

60 ÷ 10 = ?

40 ÷ 5 = ?

Step 2 — cross out the sentence with each answer

1.The villain scouted the dark corridor using night goggles, then drilled through the stone slab with a pocket drill.

2.The villain scouted the dark corridor using night goggles, then scouted ahead using a hover drone.

3.The villain blasted the stone door open with a sound blaster, then scouted ahead using a hover drone.

4.The villain scaled the temple wall with a grappling hook, then zoomed up the ravine with a turbo jetpack.

5.The villain scouted the dark corridor using night goggles, then zoomed up the ravine with a turbo jetpack.

6.The villain glided across the canopy with glider wings, then escaped through the muddy track in an armored buggy.

7.The villain scaled the temple wall with a grappling hook, then scouted ahead using a hover drone.

8.The villain blasted the stone door open with a sound blaster, then drilled through the stone slab with a pocket drill.

9.The villain vanished behind thick smoke bombs, then zoomed up the ravine with a turbo jetpack.

10.The villain scaled the temple wall with a grappling hook, then drilled through the stone slab with a pocket drill.

11.The villain vanished behind thick smoke bombs, then slipped past the guards in stealth camo.

12.The villain glided across the canopy with glider wings, then drilled through the stone slab with a pocket drill.

Solve it

Name the culprit

Choose the one suspect left standing.

Answer Key — Mystery of the Sunken Sun Stone

Culprit: Zack Vance (Smoke Bombs · Turbo Jetpack · Solar Badge · Blue Helmet · Bright Flash)

Clue 1 (Addition): "THE VILLAIN DOES NOT USE THE ARMORED BUGGY"
2231 + 4244 = 6475 (T) · 1460 + 2108 = 3568 (N) · 3187 + 5607 = 8794 (M) · 3292 + 6436 = 9728 (G) · 1603 + 1810 = 3413 (V) · 5670 + 4080 = 9750 (R) · 907 + 1957 = 2864 (I) · 2614 + 4226 = 6840 (U) · 1043 + 1298 = 2341 (E) · 1994 + 2151 = 4145 (D) · 4142 + 2839 = 6981 (O) · 4898 + 2417 = 7315 (H) · 2707 + 1769 = 4476 (A) · 3252 + 3172 = 6424 (Y) · 2119 + 3124 = 5243 (L) · 2191 + 4734 = 6925 (B) · 5203 + 3402 = 8605 (S)
Clue 2 (Rounding): "A SOLAR BADGE WAS DROPPED NEAR THE VAULT"
Round 3,682 to the nearest hundred = 3700 (A) · Round 2,315 to the nearest hundred = 2300 (R) · Round 109 to the nearest ten = 110 (U) · Round 4,260 to the nearest hundred = 4300 (W) · Round 1,074 to the nearest hundred = 1100 (T) · Round 433 to the nearest ten = 430 (N) · Round 2,086 to the nearest thousand = 2000 (S) · Round 50 to the nearest ten = 50 (G) · Round 510 to the nearest hundred = 500 (E) · Round 230 to the nearest ten = 230 (B) · Round 1,252 to the nearest hundred = 1300 (O) · Round 1,684 to the nearest hundred = 1700 (H) · Round 715 to the nearest hundred = 700 (D) · Round 290 to the nearest ten = 290 (L) · Round 257 to the nearest hundred = 300 (V) · Round 9,067 to the nearest thousand = 9000 (P)
Clue 3 (Subtraction): "THE THIEF WAS STUNNED BY A BRIGHT FLASH"
5862 - 17 = 5845 (T) · 9903 - 2366 = 7537 (N) · 7990 - 2470 = 5520 (G) · 11884 - 3278 = 8606 (Y) · 11964 - 4021 = 7943 (B) · 6482 - 2259 = 4223 (W) · 7526 - 4270 = 3256 (R) · 9294 - 1306 = 7988 (L) · 9224 - 2764 = 6460 (H) · 7330 - 1164 = 6166 (I) · 11805 - 4667 = 7138 (U) · 12762 - 4250 = 8512 (S) · 8335 - 1192 = 7143 (F) · 5310 - 3199 = 2111 (A) · 6273 - 2199 = 4074 (E) · 7478 - 3187 = 4291 (D)
Clue 4 (Multiplication facts (1-12)): "BLUE SCRAPINGS CAME FROM A BLUE HELMET"
7 × 1 = 7 (B) · 3 × 3 = 9 (I) · 7 × 9 = 63 (M) · 1 × 8 = 8 (N) · 5 × 7 = 35 (L) · 5 × 10 = 50 (E) · 11 × 9 = 99 (C) · 10 × 10 = 100 (R) · 4 × 6 = 24 (A) · 6 × 9 = 54 (F) · 9 × 9 = 81 (O) · 11 × 1 = 11 (G) · 11 × 6 = 66 (S) · 4 × 8 = 32 (U) · 4 × 7 = 28 (H) · 5 × 4 = 20 (P) · 9 × 3 = 27 (T)
Clue 5 (Division facts (1-12)): surviving statement (box 9) → Zack Vance
6 ÷ 3 = 2 · 7 ÷ 1 = 7 · 48 ÷ 12 = 4 · 21 ÷ 7 = 3 · 12 ÷ 1 = 12 · 30 ÷ 6 = 5 · 110 ÷ 11 = 10 · 4 ÷ 4 = 1 · 22 ÷ 2 = 11 · 60 ÷ 10 = 6 · 40 ÷ 5 = 8

About this mystery

Grade level: Grade 4 math
Math topics: Addition, Rounding, Subtraction, Multiplication, Division
Reading level: grades 5-6
Theme: Mystery of the Sunken Sun Stone — set in Temple of the Golden Jaguar
Format: Interactive online & printable worksheet with answer key
Solution: One unique, verified culprit among 21 suspects

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