Grade 4Reading: grades 3-4Place valueAdditionMultiplicationSkip countingDivision

The Whispering Vines Mystery

The priceless Golden Pineapple has vanished from the Jungle Basecamp! The culprit left a trail of muddy boots and mysterious gear. As a junior explorer, you must follow the clues, use your math skills, and find out which rogue explorer took it before they escape on the riverboat!

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	Primary Tool	Backpack Item	Wrist Accessory	Hat Style	Jungle Snack
Toby Trail	metal detector	walkie talkie	wears a watch	pith helmet	dried mango
Sam Sterling	grappling hook	camera	wears a watch	pith helmet	banana chips
Mia Thorne	machete	camera	wears a watch	brown fedora	trail mix
Indiana Jones	grappling hook	camera	wears a watch	brown fedora	banana chips
Max Hunter	metal detector	flashlight	wears a watch	red cap	dried mango
Ruby Rhodes	jungle compass	flashlight	wears a watch	red cap	dried mango
Lara Croft	machete	climbing rope	wears a watch	pith helmet	banana chips
Rex Rust	jungle compass	canteen	wears a compass	pith helmet	dried mango
Gemma Stone	metal detector	walkie talkie	wears a compass	red cap	banana chips
Leo Alvarez	metal detector	camera	wears a watch	brown fedora	trail mix
Ivy Vines	magnifying glass	walkie talkie	wears a compass	pith helmet	banana chips
Ben Mercer	machete	walkie talkie	wears a watch	red cap	banana chips
Luke Ledger	jungle compass	walkie talkie	wears a watch	red cap	trail mix
Jack Wilder	jungle compass	climbing rope	wears a compass	red cap	banana chips
Zoe Carter	jungle compass	walkie talkie	wears a watch	pith helmet	dried mango
Diego Marquez	jungle compass	walkie talkie	wears a watch	pith helmet	banana chips
Jane Goodall	grappling hook	climbing rope	wears a watch	pith helmet	banana chips
Dora Marquez	magnifying glass	flashlight	wears a compass	red cap	dried mango
Finn Fletcher	jungle compass	flashlight	wears a watch	pith helmet	dried mango
Penny Pine	jungle compass	canteen	wears a watch	pith helmet	banana chips
Chloe Canyon	jungle compass	canteen	wears a watch	brown fedora	banana chips

Clue 1

Place value

A locked digital chest holds the first clue! We need to read the code by looking at the hundreds, tens, and ones places on the keypad.

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

200

6000

400

8000

7000

4000

7000

100

400

200

400

100

What is the value of the 1 in 9,138?T

What is the value of the 4 in 6,341?I

What is the value of the 6 in 86,375?L

What is the value of the 9 in 598?N

What is the value of the 4 in 463?A

What is the value of the 7 in 57,503?O

What is the value of the 8 in 8,642?D

What is the value of the 2 in 260?V

What is the value of the 7 in 874?C

What is the value of the 6 in 360?E

What is the value of the 4 in 14,237?S

What is the value of the 1 in 6,716?H

0/12 letters found

Clue 2

Addition

We found footprints going in two directions. Let us add the left footprints to the right footprints to find the total count.

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

9636

7603

5379

9743

7204

9743

6367

5379

5732

9636

7877

5379

9108

9694

9743

9108

7877

9108

9636

5732

7603

4982

2167

9636

7603

5379

5583

5379

4215

9636

7877

9694

3494

9743

9636

5220 + 4416 =T

3480 + 4397 =W

1471 + 696 =N

3004 + 2375 =E

2149 + 2833 =O

2694 + 4510 =U

6243 + 3451 =R

2241 + 1253 =I

3180 + 2552 =C

5852 + 3891 =S

1398 + 2817 =F

3623 + 2744 =P

4511 + 3092 =H

2755 + 2828 =L

3067 + 6041 =A

0/15 letters found

Clue 3

Multiplication facts (1-12)

The suspect climbed up a wall of ancient tiles. The tiles are lined up in neat rows and columns. Multiply them to count the 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.

121

11 × 11 =C

3 × 2 =H

3 × 5 =F

11 × 6 =P

5 × 5 =D

5 × 8 =R

12 × 5 =B

4 × 11 =I

1 × 11 =O

4 × 7 =L

6 × 4 =T

9 × 9 =N

8 × 4 =S

4 × 1 =E

1 × 2 =W

6 × 9 =U

11 × 9 =A

0/17 letters found

Clue 4

Skip counting

The escape path goes across stepping stones over a muddy swamp. The stones are numbered by skip counting. Let us follow the pattern!

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

130

100

120

110

100

130

110

130

Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, ___, 140, 150T

Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, ___, 33, 36L

Skip-count by 10s. Fill the blank: 10, 20, 30, 40, ___, 60, 70A

Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65H

Skip-count by 5s. Fill the blank: 5, 10, ___, 20, 25F

Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, ___, 65, 70N

Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, ___, 130, 140W

Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110S

Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55E

Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14U

Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130P

Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, ___, 110, 120R

Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, ___, 24, 27M

Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, ___, 42, 45I

Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33D

Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, ___, 40, 45O

Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, ___, 39, 42G

0/17 letters found

Clue 5

Division facts (1-12) — the last clue

The team found a stash of banana slices left behind. If we share them equally among our rescue monkeys, we can find the final secret!

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

121 ÷ 11 = ?

84 ÷ 7 = ?

12 ÷ 3 = ?

30 ÷ 10 = ?

14 ÷ 2 = ?

60 ÷ 6 = ?

72 ÷ 9 = ?

66 ÷ 11 = ?

54 ÷ 6 = ?

24 ÷ 12 = ?

1 ÷ 1 = ?

Step 2 — cross out the sentence with each answer

1.The villain plotted a quick escape route using a jungle compass, then tied up the camp gate with climbing rope.

2.The villain examined the ancient lock with a magnifying glass, then spilled fresh water from a leaky canteen.

3.The villain searched the sandy floor with a metal detector, then whispered a secret radio code into a walkie talkie.

4.The villain cleared a path through the thick brush with a machete, then tied up the camp gate with climbing rope.

5.The villain plotted a quick escape route using a jungle compass, then whispered a secret radio code into a walkie talkie.

6.The villain swung across the camp fence using a grappling hook, then lit up the dark jungle trail with a flashlight.

7.The villain examined the ancient lock with a magnifying glass, then snapped a quick photo of the empty pedestal with a camera.

8.The villain plotted a quick escape route using a jungle compass, then lit up the dark jungle trail with a flashlight.

9.The villain examined the ancient lock with a magnifying glass, then whispered a secret radio code into a walkie talkie.

10.The villain cleared a path through the thick brush with a machete, then whispered a secret radio code into a walkie talkie.

11.The villain swung across the camp fence using a grappling hook, then snapped a quick photo of the empty pedestal with a camera.

12.The villain swung across the camp fence using a grappling hook, then tied up the camp gate with climbing rope.

Solve it

Name the culprit

Choose the one suspect left standing.

Answer Key — The Whispering Vines Mystery

Culprit: Diego Marquez (jungle compass · walkie talkie · wears a watch · pith helmet · banana chips)

Clue 1 (Place value): "THE VILLAIN DOES NOT HAVE A CANTEEN"
What is the value of the 1 in 9,138? = 100 (T) · What is the value of the 4 in 6,341? = 40 (I) · What is the value of the 6 in 86,375? = 6000 (L) · What is the value of the 9 in 598? = 90 (N) · What is the value of the 4 in 463? = 400 (A) · What is the value of the 7 in 57,503? = 7000 (O) · What is the value of the 8 in 8,642? = 8000 (D) · What is the value of the 2 in 260? = 200 (V) · What is the value of the 7 in 874? = 70 (C) · What is the value of the 6 in 360? = 60 (E) · What is the value of the 4 in 14,237? = 4000 (S) · What is the value of the 1 in 6,716? = 10 (H)
Clue 2 (Addition): "THE SUSPECT WEARS A WATCH ON THE LEFT WRIST"
5220 + 4416 = 9636 (T) · 3480 + 4397 = 7877 (W) · 1471 + 696 = 2167 (N) · 3004 + 2375 = 5379 (E) · 2149 + 2833 = 4982 (O) · 2694 + 4510 = 7204 (U) · 6243 + 3451 = 9694 (R) · 2241 + 1253 = 3494 (I) · 3180 + 2552 = 5732 (C) · 5852 + 3891 = 9743 (S) · 1398 + 2817 = 4215 (F) · 3623 + 2744 = 6367 (P) · 4511 + 3092 = 7603 (H) · 2755 + 2828 = 5583 (L) · 3067 + 6041 = 9108 (A)
Clue 3 (Multiplication facts (1-12)): "CRUNCHED BANANA CHIPS WERE LEFT ON THE PATH"
11 × 11 = 121 (C) · 3 × 2 = 6 (H) · 3 × 5 = 15 (F) · 11 × 6 = 66 (P) · 5 × 5 = 25 (D) · 5 × 8 = 40 (R) · 12 × 5 = 60 (B) · 4 × 11 = 44 (I) · 1 × 11 = 11 (O) · 4 × 7 = 28 (L) · 6 × 4 = 24 (T) · 9 × 9 = 81 (N) · 8 × 4 = 32 (S) · 4 × 1 = 4 (E) · 1 × 2 = 2 (W) · 6 × 9 = 54 (U) · 11 × 9 = 99 (A)
Clue 4 (Skip counting): "THE GROUND SHOWS IMPRINTS OF A PITH HELMET"
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, ___, 140, 150 = 130 (T) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, ___, 33, 36 = 30 (L) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, ___, 60, 70 = 50 (A) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65 = 55 (H) · Skip-count by 5s. Fill the blank: 5, 10, ___, 20, 25 = 15 (F) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, ___, 65, 70 = 60 (N) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, ___, 130, 140 = 120 (W) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110 = 90 (S) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55 = 45 (E) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14 = 10 (U) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130 = 110 (P) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, ___, 110, 120 = 100 (R) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, ___, 24, 27 = 21 (M) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, ___, 42, 45 = 39 (I) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33 = 27 (D) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, ___, 40, 45 = 35 (O) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, ___, 39, 42 = 36 (G)
Clue 5 (Division facts (1-12)): surviving statement (box 5) → Diego Marquez
121 ÷ 11 = 11 · 84 ÷ 7 = 12 · 12 ÷ 3 = 4 · 30 ÷ 10 = 3 · 14 ÷ 2 = 7 · 60 ÷ 6 = 10 · 72 ÷ 9 = 8 · 66 ÷ 11 = 6 · 54 ÷ 6 = 9 · 24 ÷ 12 = 2 · 1 ÷ 1 = 1

About this mystery

Grade level: Grade 4 math
Math topics: Place value, Addition, Multiplication, Skip counting, Division
Reading level: grades 3-4
Theme: The Whispering Vines Mystery — set in Whispering Vines Jungle Basecamp
Format: Interactive online & printable worksheet with answer key
Solution: One unique, verified culprit among 21 suspects

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