Grade 4Reading: grades 3-4Place valueRoundingAdditionSubtractionDivision
The Mystery of the Golden Pineapple
The legendary Golden Pineapple has been snatched from the central altar of the Whispering Vines temple! Our expedition needs you to follow the trails of jungle gear, sneaky tools, and unique habits to unmask the rogue explorer who took 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 | Jungle Skill | Special Tool | Compass Grip | Headwear | Funny Weakness |
|---|---|---|---|---|---|
| Forrest Fern | swings on jungle vines | blows a golden whistle | right handed compass | green explorer cap | tickled by hanging vines |
| Quinn Quick | decodes stone wall maps | uses a laser pointer | left handed compass | yellow pith helmet | fear of tiny frogs |
| Indiana Smith | swings on jungle vines | blows a golden whistle | left handed compass | green explorer cap | sneezes near wild orchids |
| Val Valley | tames the wild jaguars | throws a sticky grapple | right handed compass | brown safari helmet | sneezes near wild orchids |
| Lara Crate | disarms ancient dart traps | uses a laser pointer | right handed compass | brown safari helmet | fear of tiny frogs |
| Danny Daring | disarms ancient dart traps | rides a pocket dirtbike | right handed compass | green explorer cap | tickled by hanging vines |
| Dora Map | decodes stone wall maps | uses a laser pointer | left handed compass | brown safari helmet | fear of tiny frogs |
| Jack Journey | leaps over quicksand pits | blows a golden whistle | left handed compass | yellow pith helmet | fear of tiny frogs |
| Leo Leaf | leaps over quicksand pits | flies a pocket drone | right handed compass | yellow pith helmet | sneezes near wild orchids |
| Olivia Oasis | leaps over quicksand pits | uses a laser pointer | right handed compass | yellow pith helmet | fear of tiny frogs |
| Diego Rescue | swings on jungle vines | uses a laser pointer | left handed compass | green explorer cap | tickled by hanging vines |
| Hunter Hill | swings on jungle vines | rides a pocket dirtbike | left handed compass | green explorer cap | fear of tiny frogs |
| Parker Path | leaps over quicksand pits | blows a golden whistle | left handed compass | green explorer cap | tickled by hanging vines |
| Kira King | leaps over quicksand pits | rides a pocket dirtbike | left handed compass | green explorer cap | sneezes near wild orchids |
| Gemma Green | tames the wild jaguars | throws a sticky grapple | left handed compass | yellow pith helmet | fear of tiny frogs |
| River Runner | swings on jungle vines | flies a pocket drone | left handed compass | yellow pith helmet | fear of tiny frogs |
| Sally Scout | decodes stone wall maps | throws a sticky grapple | left handed compass | yellow pith helmet | sneezes near wild orchids |
| Nate Navigator | decodes stone wall maps | throws a sticky grapple | left handed compass | yellow pith helmet | fear of tiny frogs |
| Ivy Jungle | tames the wild jaguars | throws a sticky grapple | left handed compass | brown safari helmet | tickled by hanging vines |
| Maya Mound | leaps over quicksand pits | flies a pocket drone | left handed compass | yellow pith helmet | sneezes near wild orchids |
| Clara Canyon | decodes stone wall maps | flies a pocket drone | left handed compass | brown safari helmet | fear of tiny frogs |
Clue 1
Place value
The temple door has a dusty stone screen. It shows a giant code. We must find the digit in the tens place to unlock the next chamber.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
T
400
100
900
40
200
3000
8000
900
40
8000
30
900
70
4000
30
T
400
800
500
30
2000
200
10
30
500
8000
900
4000
2000
100
3000
70
T
400
500
900
What is the value of the 4 in 1,419?T
What is the value of the 3 in 838?O
What is the value of the 1 in 139?H
What is the value of the 8 in 1,835?B
What is the value of the 1 in 3,319?G
What is the value of the 4 in 4,516?N
What is the value of the 2 in 62,884?W
What is the value of the 7 in 176?S
What is the value of the 9 in 903?E
What is the value of the 8 in 38,949?D
What is the value of the 4 in 140?R
What is the value of the 3 in 63,557?I
What is the value of the 2 in 286?A
What is the value of the 5 in 2,539?L
0/14 letters found
Clue 2
Rounding
We find a giant stone scale blocking the path. It only gives a weight rounded to the nearest ten. Let us round our heavy backpacks to proceed.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
T
170
3000
1700
130
3000
1700
2300
900
T
170
3000
1700
30
20
4300
700
2900
290
290
5000
110
T
170
3000
1700
2300
1700
370
T
170
3000
2900
110
900
Round 167 to the nearest tenT
Round 743 to the nearest hundredP
Round 3,259 to the nearest thousandH
Round 2,900 to the nearest hundredA
Round 2,326 to the nearest hundredL
Round 367 to the nearest tenF
Round 4,798 to the nearest thousandI
Round 27 to the nearest tenC
Round 114 to the nearest tenN
Round 923 to the nearest hundredD
Round 19 to the nearest tenO
Round 291 to the nearest tenS
Round 1,656 to the nearest hundredE
Round 4,278 to the nearest hundredM
Round 134 to the nearest tenY
0/15 letters found
Clue 3
Addition
A swarm of friendly glowing beetles crawls on the wall. If we add the two groups together, they will light up our 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.
T
4719
6500
4889
7526
8362
6916
6916
3049
8362
7074
2906
3049
7074
3049
6682
3049
7324
6667
2906
8180
7313
3049
T
4719
8362
7074
7324
5194
2906
4889
4889
7074
6667
2906
8180
5194
2729 + 1990 =T
3315 + 4865 =O
3087 + 5275 =I
1103 + 1803 =R
1618 + 3271 =E
3962 + 2705 =F
2661 + 4021 =W
4429 + 2884 =M
2774 + 4752 =V
4748 + 2326 =N
3883 + 3033 =L
1295 + 1754 =A
2041 + 4459 =H
2787 + 4537 =Y
1699 + 3495 =G
0/15 letters found
Clue 4
Subtraction
A deep water trap stands before us. We must calculate how much water drained out of the main pool to find the secret lever.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
W
7804
6677
8299
8650
5280
5854
5098
5770
7641
6677
8341
8341
8650
W
7804
6414
1258
4916
4587
4587
6677
8341
3582
6677
4916
5770
4916
4916
4587
6677
2847
1258
4916
6677
10281 - 2477 =W
7084 - 407 =E
12001 - 3351 =O
9991 - 1650 =L
10324 - 2025 =F
2671 - 1413 =I
5715 - 1128 =H
9593 - 3823 =A
3888 - 1041 =S
5983 - 1067 =T
9623 - 3209 =P
6733 - 1635 =D
4714 - 1132 =M
11192 - 3551 =Y
8215 - 2361 =N
9036 - 3756 =U
0/16 letters found
Clue 5
Division facts (1-12) — the last clue
Four hungry spider monkeys are waiting in the canopy. We need to divide our pile of sweet bananas evenly among them.
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
81 ÷ 9 = ?
96 ÷ 8 = ?
1 ÷ 1 = ?
11 ÷ 1 = ?
10 ÷ 1 = ?
12 ÷ 3 = ?
32 ÷ 4 = ?
3 ÷ 1 = ?
66 ÷ 11 = ?
10 ÷ 5 = ?
14 ÷ 2 = ?
Step 2 — cross out the sentence with each answer
1.The villain cracks the ancient stone lock, then shines a laser at the map.
2.The villain snips the sneaky trap wire, then zooms off on a mini dirtbike.
3.The villain cracks the ancient stone lock, then blasts a loud golden whistle.
4.The villain whispers to the guard jaguar, then zooms off on a mini dirtbike.
5.The villain cracks the ancient stone lock, then zips upward on a sticky grapple.
6.The villain whispers to the guard jaguar, then shines a laser at the map.
7.The villain snips the sneaky trap wire, then zips upward on a sticky grapple.
8.The villain whispers to the guard jaguar, then blasts a loud golden whistle.
9.The villain whispers to the guard jaguar, then zips upward on a sticky grapple.
10.The villain hops over the deep quicksand, then blasts a loud golden whistle.
11.The villain cracks the ancient stone lock, then zooms off on a mini dirtbike.
12.The villain swings across the river, then launches a tiny scout drone.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Mystery of the Golden Pineapple
Culprit: Nate Navigator (decodes stone wall maps · throws a sticky grapple · left handed compass · yellow pith helmet · fear of tiny frogs)
- Clue 1 (Place value): "THE RAIDER DOES NOT BLOW A GOLDEN WHISTLE"What is the value of the 4 in 1,419? = 400 (T) · What is the value of the 3 in 838? = 30 (O) · What is the value of the 1 in 139? = 100 (H) · What is the value of the 8 in 1,835? = 800 (B) · What is the value of the 1 in 3,319? = 10 (G) · What is the value of the 4 in 4,516? = 4000 (N) · What is the value of the 2 in 62,884? = 2000 (W) · What is the value of the 7 in 176? = 70 (S) · What is the value of the 9 in 903? = 900 (E) · What is the value of the 8 in 38,949? = 8000 (D) · What is the value of the 4 in 140? = 40 (R) · What is the value of the 3 in 63,557? = 3000 (I) · What is the value of the 2 in 286? = 200 (A) · What is the value of the 5 in 2,539? = 500 (L)
- Clue 2 (Rounding): "THEY HELD THE COMPASS IN THE LEFT HAND"Round 167 to the nearest ten = 170 (T) · Round 743 to the nearest hundred = 700 (P) · Round 3,259 to the nearest thousand = 3000 (H) · Round 2,900 to the nearest hundred = 2900 (A) · Round 2,326 to the nearest hundred = 2300 (L) · Round 367 to the nearest ten = 370 (F) · Round 4,798 to the nearest thousand = 5000 (I) · Round 27 to the nearest ten = 30 (C) · Round 114 to the nearest ten = 110 (N) · Round 923 to the nearest hundred = 900 (D) · Round 19 to the nearest ten = 20 (O) · Round 291 to the nearest ten = 290 (S) · Round 1,656 to the nearest hundred = 1700 (E) · Round 4,278 to the nearest hundred = 4300 (M) · Round 134 to the nearest ten = 130 (Y)
- Clue 3 (Addition): "THE VILLAIN RAN AWAY FROM A TINY GREEN FROG"2729 + 1990 = 4719 (T) · 3315 + 4865 = 8180 (O) · 3087 + 5275 = 8362 (I) · 1103 + 1803 = 2906 (R) · 1618 + 3271 = 4889 (E) · 3962 + 2705 = 6667 (F) · 2661 + 4021 = 6682 (W) · 4429 + 2884 = 7313 (M) · 2774 + 4752 = 7526 (V) · 4748 + 2326 = 7074 (N) · 3883 + 3033 = 6916 (L) · 1295 + 1754 = 3049 (A) · 2041 + 4459 = 6500 (H) · 2787 + 4537 = 7324 (Y) · 1699 + 3495 = 5194 (G)
- Clue 4 (Subtraction): "WE FOUND A YELLOW PITH HELMET AT THE SITE"10281 - 2477 = 7804 (W) · 7084 - 407 = 6677 (E) · 12001 - 3351 = 8650 (O) · 9991 - 1650 = 8341 (L) · 10324 - 2025 = 8299 (F) · 2671 - 1413 = 1258 (I) · 5715 - 1128 = 4587 (H) · 9593 - 3823 = 5770 (A) · 3888 - 1041 = 2847 (S) · 5983 - 1067 = 4916 (T) · 9623 - 3209 = 6414 (P) · 6733 - 1635 = 5098 (D) · 4714 - 1132 = 3582 (M) · 11192 - 3551 = 7641 (Y) · 8215 - 2361 = 5854 (N) · 9036 - 3756 = 5280 (U)
- Clue 5 (Division facts (1-12)): surviving statement (box 5) → Nate Navigator81 ÷ 9 = 9 · 96 ÷ 8 = 12 · 1 ÷ 1 = 1 · 11 ÷ 1 = 11 · 10 ÷ 1 = 10 · 12 ÷ 3 = 4 · 32 ÷ 4 = 8 · 3 ÷ 1 = 3 · 66 ÷ 11 = 6 · 10 ÷ 5 = 2 · 14 ÷ 2 = 7
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Place value, Rounding, Addition, Subtraction, Division
- Reading level
- grades 3-4
- Theme
- The Mystery of the Golden Pineapple — set in The Lost Ruins of Whispering Vines
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects