Grade 4Reading: grades 3-4Fractions of a numberRoundingAdditionSubtraction

The Golden Idol Adventure

The golden monkey idol has been snatched from the camp tent! Our team of Junior Explorers must search the island, solve clues, and identify the jungle bandit before they sail away.

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	Jungle Tool	Special Gear	Writing Style	Headwear Color	Secret Fear
Mia	camo cloak	snorkel	uses left hand to write	blue headband	dislikes loud parrot squawks
Leo	speed boots	decoder ring	uses left hand to write	muddy safari cap	afraid of tiny spiders
Cole	lasso of vines	decoder ring	uses left hand to write	muddy safari cap	afraid of tiny spiders
Chloe	lasso of vines	snorkel	uses left hand to write	bright red hat	afraid of tiny spiders
Ben	sonar compass	grappling hook	uses right hand to write	bright red hat	allergic to jungle flowers
Maya	camo cloak	night vision goggles	uses right hand to write	blue headband	dislikes loud parrot squawks
Zoe	climbing claws	snorkel	uses right hand to write	muddy safari cap	afraid of tiny spiders
Noah	camo cloak	jetpack	uses right hand to write	bright red hat	afraid of tiny spiders
Lily	speed boots	jetpack	uses right hand to write	blue headband	dislikes loud parrot squawks
Ava	sonar compass	decoder ring	uses left hand to write	bright red hat	allergic to jungle flowers
Toby	speed boots	jetpack	uses right hand to write	muddy safari cap	afraid of tiny spiders
Jack	climbing claws	snorkel	uses left hand to write	bright red hat	allergic to jungle flowers
Finn	climbing claws	snorkel	uses left hand to write	muddy safari cap	afraid of tiny spiders
Owen	lasso of vines	grappling hook	uses left hand to write	bright red hat	dislikes loud parrot squawks
Luke	lasso of vines	decoder ring	uses right hand to write	blue headband	dislikes loud parrot squawks
Ella	camo cloak	snorkel	uses left hand to write	muddy safari cap	afraid of tiny spiders
Sam	climbing claws	jetpack	uses right hand to write	blue headband	allergic to jungle flowers
Emma	speed boots	jetpack	uses right hand to write	blue headband	afraid of tiny spiders
Max	speed boots	night vision goggles	uses left hand to write	muddy safari cap	afraid of tiny spiders
Zack	camo cloak	jetpack	uses left hand to write	muddy safari cap	allergic to jungle flowers
Indy	camo cloak	grappling hook	uses left hand to write	bright red hat	afraid of tiny spiders

Clue 1

Fractions of a number

Our Junior Explorers need to share their secret safari maps. We must calculate the exact fraction of maps for each camp to unlock the first radio channel!

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

6/10 of 55 =T

5/10 of 68 =E

4/6 of 12 =B

4/10 of 40 =S

3/6 of 58 =A

2/6 of 120 =U

2/3 of 3 =L

2/4 of 44 =N

1/8 of 40 =G

1/4 of 92 =I

3/10 of 10 =V

1/4 of 152 =O

2/8 of 48 =D

2/10 of 155 =H

0/14 letters found

Clue 2

Rounding

A bumpy helicopter ride makes the altitude tracker wobble. Round the distance to the nearest ten meters to get a clean signal on the radar screen.

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

1300

130

500

2900

5000

230

1700

1300

700

230

500

9000

5000

500

1100

1300

130

9000

7000

500

370

9000

230

Round 1,268 to the nearest hundredT

Round 134 to the nearest tenH

Round 4,648 to the nearest thousandL

Round 2,903 to the nearest hundredU

Round 1,129 to the nearest hundredF

Round 233 to the nearest tenP

Round 8,526 to the nearest thousandA

Round 88 to the nearest tenC

Round 670 to the nearest hundredO

Round 66 to the nearest tenD

Round 366 to the nearest tenM

Round 6,717 to the nearest thousandN

Round 1,702 to the nearest hundredI

Round 23 to the nearest tenR

Round 494 to the nearest hundredE

0/15 letters found

Clue 3

Addition

We found footprints along the muddy riverbank. Tally up all the boot prints we counted in the mud to find the secret jungle path.

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

8157

4122

7648

5483

5240

6803

6890

3468

4886

9343

6281

7648

6638

9343

3468

5240

5406

8157

7648

4393

6586

6638

5934

6961

4886

7648

3468

6638

5119 + 3038 =T

1873 + 3367 =O

4514 + 2447 =I

4603 + 1983 =Y

3523 + 1960 =C

2439 + 5209 =E

1995 + 3411 =M

3304 + 1582 =D

2308 + 1160 =R

2642 + 1751 =N

3283 + 2998 =L

2782 + 4108 =A

2843 + 1279 =H

2491 + 3443 =P

4094 + 5249 =F

3475 + 3328 =W

4556 + 2082 =S

0/17 letters found

Clue 4

Subtraction

The water flasks are leaking on this hot trail. Subtract the spilled water from our total supply to see how much we have left for the trek.

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

7810

1374

8975

1263

5951

6378

6324

5749

5951

6324

5281

1662

6449

8975

6449

8922

4283

6365

6449

6529

6324

5951

1662

5027

1263

6378

6449

1715

1374

6449

8975

11490 - 3680 =W

9212 - 3463 =M

4015 - 2353 =S

10634 - 4683 =U

8233 - 2952 =Y

3230 - 1856 =E

13330 - 4355 =F

8440 - 4157 =I

2480 - 765 =L

7707 - 1383 =D

7566 - 1037 =P

2540 - 1277 =O

9848 - 926 =R

6978 - 1951 =T

8123 - 1745 =N

10657 - 4292 =C

7091 - 642 =A

0/17 letters found

Clue 5

Fractions of a number — the last clue

The lock on the temple door requires a fraction of the gold coins to be placed in the tray. Solve the math to open the heavy stone gate.

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

3/4 of 4 = ?

2/8 of 8 = ?

2/6 of 3 = ?

1/8 of 64 = ?

4/8 of 18 = ?

1/6 of 66 = ?

2/6 of 30 = ?

3/6 of 8 = ?

2/5 of 15 = ?

1/8 of 56 = ?

5/10 of 10 = ?

Step 2 — cross out the sentence with each answer

1.The villain sneaks past the sleeping monkey, then hides inside the hollow tree.

2.The villain crosses the rickety rope bridge, then zooms off on a mud bike.

3.The villain swings across the canyon, then zooms off on a mud bike.

4.The villain paddles down the rushing river, then flies away in a hot air balloon.

5.The villain crosses the rickety rope bridge, then escapes in a yellow jeep.

6.The villain swings across the canyon, then dives into the secret lagoon.

7.The villain decodes the secret stone wall, then flies away in a hot air balloon.

8.The villain crosses the rickety rope bridge, then dives into the secret lagoon.

9.The villain sneaks past the sleeping monkey, then dives into the secret lagoon.

10.The villain decodes the secret stone wall, then zooms off on a mud bike.

11.The villain crosses the rickety rope bridge, then flies away in a hot air balloon.

12.The villain paddles down the rushing river, then hides inside the hollow tree.

Solve it

Name the culprit

Choose the one suspect left standing.

Answer Key — The Golden Idol Adventure

Culprit: Cole (lasso of vines · decoder ring · uses left hand to write · muddy safari cap · afraid of tiny spiders)

Clue 1 (Fractions of a number): "THE BANDIT DOES NOT USE NIGHT VISION GOGGLES"
6/10 of 55 = 33 (T) · 5/10 of 68 = 34 (E) · 4/6 of 12 = 8 (B) · 4/10 of 40 = 16 (S) · 3/6 of 58 = 29 (A) · 2/6 of 120 = 40 (U) · 2/3 of 3 = 2 (L) · 2/4 of 44 = 22 (N) · 1/8 of 40 = 5 (G) · 1/4 of 92 = 23 (I) · 3/10 of 10 = 3 (V) · 1/4 of 152 = 38 (O) · 2/8 of 48 = 12 (D) · 2/10 of 155 = 31 (H)
Clue 2 (Rounding): "THE CULPRIT DROPPED A LEFT HANDED MAP"
Round 1,268 to the nearest hundred = 1300 (T) · Round 134 to the nearest ten = 130 (H) · Round 4,648 to the nearest thousand = 5000 (L) · Round 2,903 to the nearest hundred = 2900 (U) · Round 1,129 to the nearest hundred = 1100 (F) · Round 233 to the nearest ten = 230 (P) · Round 8,526 to the nearest thousand = 9000 (A) · Round 88 to the nearest ten = 90 (C) · Round 670 to the nearest hundred = 700 (O) · Round 66 to the nearest ten = 70 (D) · Round 366 to the nearest ten = 370 (M) · Round 6,717 to the nearest thousand = 7000 (N) · Round 1,702 to the nearest hundred = 1700 (I) · Round 23 to the nearest ten = 20 (R) · Round 494 to the nearest hundred = 500 (E)
Clue 3 (Addition): "THE COWARD FLEES FROM TEENY SPIDERS"
5119 + 3038 = 8157 (T) · 1873 + 3367 = 5240 (O) · 4514 + 2447 = 6961 (I) · 4603 + 1983 = 6586 (Y) · 3523 + 1960 = 5483 (C) · 2439 + 5209 = 7648 (E) · 1995 + 3411 = 5406 (M) · 3304 + 1582 = 4886 (D) · 2308 + 1160 = 3468 (R) · 2642 + 1751 = 4393 (N) · 3283 + 2998 = 6281 (L) · 2782 + 4108 = 6890 (A) · 2843 + 1279 = 4122 (H) · 2491 + 3443 = 5934 (P) · 4094 + 5249 = 9343 (F) · 3475 + 3328 = 6803 (W) · 4556 + 2082 = 6638 (S)
Clue 4 (Subtraction): "WE FOUND MUDDY SAFARI CAP DUST ON A LEAF"
11490 - 3680 = 7810 (W) · 9212 - 3463 = 5749 (M) · 4015 - 2353 = 1662 (S) · 10634 - 4683 = 5951 (U) · 8233 - 2952 = 5281 (Y) · 3230 - 1856 = 1374 (E) · 13330 - 4355 = 8975 (F) · 8440 - 4157 = 4283 (I) · 2480 - 765 = 1715 (L) · 7707 - 1383 = 6324 (D) · 7566 - 1037 = 6529 (P) · 2540 - 1277 = 1263 (O) · 9848 - 926 = 8922 (R) · 6978 - 1951 = 5027 (T) · 8123 - 1745 = 6378 (N) · 10657 - 4292 = 6365 (C) · 7091 - 642 = 6449 (A)
Clue 5 (Fractions of a number): surviving statement (box 12) → Cole
3/4 of 4 = 3 · 2/8 of 8 = 2 · 2/6 of 3 = 1 · 1/8 of 64 = 8 · 4/8 of 18 = 9 · 1/6 of 66 = 11 · 2/6 of 30 = 10 · 3/6 of 8 = 4 · 2/5 of 15 = 6 · 1/8 of 56 = 7 · 5/10 of 10 = 5

About this mystery

Grade level: Grade 4 math
Math topics: Fractions of a number, Rounding, Addition, Subtraction
Reading level: grades 3-4
Theme: The Golden Idol Adventure — set in Mist Island Jungle
Format: Interactive online & printable worksheet with answer key
Solution: One unique, verified culprit among 21 suspects

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