Grade 4Reading: grades 3-4MultiplicationRoundingPlace valueAdditionDivision
The Treehouse Mystery
The golden camp trophy has vanished from the main lodge! Someone climbed up and swiped it right before the big campfire ceremony. Head Ranger Sally needs your detective skills to search the treehouse camp and track down the runaway suspect.
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 | Special Gear | Camp Badge | Wristband Wear | Helmet Color | Camp Fear |
|---|---|---|---|---|---|
| Gage | Zip Line Pulley | Star Gazing Badge | Left Wristband | Green Helmet | Scared of Spiders |
| Jax | Grappling Hook | Star Gazing Badge | Left Wristband | Blue Helmet | Hates Mud Puddles |
| Ava | Zip Line Pulley | Campfire Cooking Badge | Left Wristband | Red Helmet | Hates Mud Puddles |
| Toby | Zip Line Pulley | Knot Tying Badge | Right Wristband | Green Helmet | Hates Mud Puddles |
| Luke | Grappling Hook | Knot Tying Badge | Right Wristband | Red Helmet | Hates Mud Puddles |
| Sam | Grappling Hook | First Aid Badge | Left Wristband | Blue Helmet | Hates Mud Puddles |
| Kai | Super Spring Boots | Campfire Cooking Badge | Right Wristband | Blue Helmet | Sneezes at Pollen |
| Maya | Night Vision Goggles | Star Gazing Badge | Left Wristband | Red Helmet | Scared of Spiders |
| Otis | Glider Wings | Map Reading Badge | Left Wristband | Green Helmet | Hates Mud Puddles |
| Owen | Grappling Hook | Campfire Cooking Badge | Right Wristband | Red Helmet | Hates Mud Puddles |
| Ben | Super Spring Boots | Star Gazing Badge | Left Wristband | Blue Helmet | Scared of Spiders |
| Mia | Super Spring Boots | Star Gazing Badge | Left Wristband | Red Helmet | Hates Mud Puddles |
| Cody | Super Spring Boots | Campfire Cooking Badge | Right Wristband | Green Helmet | Hates Mud Puddles |
| Leo | Zip Line Pulley | Map Reading Badge | Right Wristband | Red Helmet | Hates Mud Puddles |
| Ella | Glider Wings | Map Reading Badge | Right Wristband | Red Helmet | Hates Mud Puddles |
| Zoe | Night Vision Goggles | Campfire Cooking Badge | Right Wristband | Blue Helmet | Scared of Spiders |
| Ivy | Zip Line Pulley | First Aid Badge | Right Wristband | Blue Helmet | Sneezes at Pollen |
| Finn | Night Vision Goggles | Star Gazing Badge | Left Wristband | Red Helmet | Sneezes at Pollen |
| Skye | Grappling Hook | Map Reading Badge | Left Wristband | Green Helmet | Hates Mud Puddles |
| Sasha | Super Spring Boots | Campfire Cooking Badge | Right Wristband | Red Helmet | Scared of Spiders |
| Nora | Glider Wings | First Aid Badge | Right Wristband | Red Helmet | Hates Mud Puddles |
Clue 1
Multiplication facts (1-12)
We found rows of supply boxes in the gear room. Count how many total boxes there are to unlock the first clue.
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
99
84
30
40
63
96
18
15
T
99
18
2
30
28
96
2
T
99
84
63
49
30
9
15
120
28
T
99
63
15
18
40
63
18
11
30
11 × 9 =T
7 × 9 =A
2 × 9 =D
3 × 10 =E
8 × 12 =N
7 × 7 =V
4 × 10 =B
12 × 10 =R
3 × 3 =F
3 × 5 =I
2 × 1 =O
7 × 4 =S
11 × 1 =G
7 × 12 =H
0/14 letters found
Clue 2
Rounding
The campsite radar screen shows the thief's escape distance. Round the distance to the nearest ten to clear the 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.
T
3000
2000
110
1300
900
9000
2000
T
3000
5000
1300
900
290
T
3000
20
70
200
1700
5000
70
290
290
200
70
9000
9000
110
1700
7000
200
70
20
1300
70
200
3700
2000
Round 2,884 to the nearest thousandT
Round 1,269 to the nearest hundredR
Round 3,664 to the nearest hundredC
Round 901 to the nearest hundredI
Round 289 to the nearest tenS
Round 9,139 to the nearest thousandG
Round 226 to the nearest hundredN
Round 21 to the nearest tenB
Round 1,995 to the nearest thousandH
Round 1,656 to the nearest hundredD
Round 73 to the nearest tenA
Round 106 to the nearest tenE
Round 7,223 to the nearest thousandO
Round 5,165 to the nearest thousandW
0/14 letters found
Clue 3
Place value
The lock on the map chest has three dials. Find the value of the digit in the hundreds place to open it.
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
200
90
20
T
200
90
2000
20
400
800
60
70
2000
300
20
300
T
200
90
20
7000
2000
10
30
5000
300
1000
5000
300
300
40
20
What is the value of the 2 in 258?T
What is the value of the 5 in 65,229?U
What is the value of the 4 in 3,642?L
What is the value of the 3 in 8,736?M
What is the value of the 1 in 6,312?G
What is the value of the 3 in 381?D
What is the value of the 7 in 57,368?B
What is the value of the 2 in 52,514?I
What is the value of the 6 in 7,863?V
What is the value of the 4 in 453?F
What is the value of the 2 in 429?E
What is the value of the 8 in 834?A
What is the value of the 9 in 1,292?H
What is the value of the 1 in 1,623?P
What is the value of the 7 in 4,476?O
0/15 letters found
Clue 4
Addition
Help Ranger Sally count all the leftover trail mix bags. Add the piles together to find the secret note underneath.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
R
6208
6087
7132
4367
6087
5712
2332
6087
7864
6046
2450
9142
5319
7864
4516
2450
4749
4749
8162
R
6208
2450
6046
6087
7132
4763
5319
7864
4367
6087
7864
R
6208
6087
6087
3766 + 2442 =R
842 + 1490 =M
3136 + 6006 =I
1604 + 846 =A
1783 + 2733 =W
2892 + 3154 =P
2720 + 3367 =E
3566 + 4596 =C
2437 + 2312 =S
3181 + 3951 =D
2429 + 2334 =O
2682 + 3030 =L
4842 + 3022 =T
1775 + 3544 =N
2014 + 2353 =H
0/15 letters found
Clue 5
Division facts (1-12) — the last clue
We need to share the rescue ropes equally among the search teams. Divide the ropes to get the final clue.
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
50 ÷ 10 = ?
90 ÷ 9 = ?
81 ÷ 9 = ?
21 ÷ 3 = ?
2 ÷ 1 = ?
18 ÷ 3 = ?
40 ÷ 5 = ?
55 ÷ 5 = ?
132 ÷ 11 = ?
20 ÷ 5 = ?
27 ÷ 9 = ?
Step 2 — cross out the sentence with each answer
1.The villain slid down with a zip line pulley, then checked the map to find the secret path.
2.The villain slid down with a zip line pulley, then tracked the stars to find north.
3.The villain bounced high with super spring boots, then patched up a scraped knee.
4.The villain swung up using a grappling hook, then patched up a scraped knee.
5.The villain swung up using a grappling hook, then tied a quick knot to escape.
6.The villain bounced high with super spring boots, then cooked a snack to keep up their energy.
7.The villain bounced high with super spring boots, then checked the map to find the secret path.
8.The villain sneaked past using night vision goggles, then cooked a snack to keep up their energy.
9.The villain swung up using a grappling hook, then cooked a snack to keep up their energy.
10.The villain soared down with glider wings, then checked the map to find the secret path.
11.The villain bounced high with super spring boots, then tracked the stars to find north.
12.The villain soared down with glider wings, then cooked a snack to keep up their energy.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Treehouse Mystery
Culprit: Leo (Zip Line Pulley · Map Reading Badge · Right Wristband · Red Helmet · Hates Mud Puddles)
- Clue 1 (Multiplication facts (1-12)): "THE BANDIT DOES NOT HAVE FIRST AID BADGE"11 × 9 = 99 (T) · 7 × 9 = 63 (A) · 2 × 9 = 18 (D) · 3 × 10 = 30 (E) · 8 × 12 = 96 (N) · 7 × 7 = 49 (V) · 4 × 10 = 40 (B) · 12 × 10 = 120 (R) · 3 × 3 = 9 (F) · 3 × 5 = 15 (I) · 2 × 1 = 2 (O) · 7 × 4 = 28 (S) · 11 × 1 = 11 (G) · 7 × 12 = 84 (H)
- Clue 2 (Rounding): "THE RIGHT WRISTBAND WAS SNAGGED ON A BRANCH"Round 2,884 to the nearest thousand = 3000 (T) · Round 1,269 to the nearest hundred = 1300 (R) · Round 3,664 to the nearest hundred = 3700 (C) · Round 901 to the nearest hundred = 900 (I) · Round 289 to the nearest ten = 290 (S) · Round 9,139 to the nearest thousand = 9000 (G) · Round 226 to the nearest hundred = 200 (N) · Round 21 to the nearest ten = 20 (B) · Round 1,995 to the nearest thousand = 2000 (H) · Round 1,656 to the nearest hundred = 1700 (D) · Round 73 to the nearest ten = 70 (A) · Round 106 to the nearest ten = 110 (E) · Round 7,223 to the nearest thousand = 7000 (O) · Round 5,165 to the nearest thousand = 5000 (W)
- Clue 3 (Place value): "THE THIEF AVOIDED THE BIG MUD PUDDLE"What is the value of the 2 in 258? = 200 (T) · What is the value of the 5 in 65,229? = 5000 (U) · What is the value of the 4 in 3,642? = 40 (L) · What is the value of the 3 in 8,736? = 30 (M) · What is the value of the 1 in 6,312? = 10 (G) · What is the value of the 3 in 381? = 300 (D) · What is the value of the 7 in 57,368? = 7000 (B) · What is the value of the 2 in 52,514? = 2000 (I) · What is the value of the 6 in 7,863? = 60 (V) · What is the value of the 4 in 453? = 400 (F) · What is the value of the 2 in 429? = 20 (E) · What is the value of the 8 in 834? = 800 (A) · What is the value of the 9 in 1,292? = 90 (H) · What is the value of the 1 in 1,623? = 1000 (P) · What is the value of the 7 in 4,476? = 70 (O)
- Clue 4 (Addition): "RED HELMET PAINT WAS SCRAPED ON THE TREE"3766 + 2442 = 6208 (R) · 842 + 1490 = 2332 (M) · 3136 + 6006 = 9142 (I) · 1604 + 846 = 2450 (A) · 1783 + 2733 = 4516 (W) · 2892 + 3154 = 6046 (P) · 2720 + 3367 = 6087 (E) · 3566 + 4596 = 8162 (C) · 2437 + 2312 = 4749 (S) · 3181 + 3951 = 7132 (D) · 2429 + 2334 = 4763 (O) · 2682 + 3030 = 5712 (L) · 4842 + 3022 = 7864 (T) · 1775 + 3544 = 5319 (N) · 2014 + 2353 = 4367 (H)
- Clue 5 (Division facts (1-12)): surviving statement (box 1) → Leo50 ÷ 10 = 5 · 90 ÷ 9 = 10 · 81 ÷ 9 = 9 · 21 ÷ 3 = 7 · 2 ÷ 1 = 2 · 18 ÷ 3 = 6 · 40 ÷ 5 = 8 · 55 ÷ 5 = 11 · 132 ÷ 11 = 12 · 20 ÷ 5 = 4 · 27 ÷ 9 = 3
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Multiplication, Rounding, Place value, Addition, Division
- Reading level
- grades 3-4
- Theme
- The Treehouse Mystery — set in the high treetops of Whispering Pines camp
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects