Grade 3Reading: grades 3-4Place valueAdditionSubtractionMultiplicationDivision
The Canopy Cove Mystery
The golden trophy has vanished from the highest treehouse branch! We must help the scouts search the sky-bridges, follow the tracks, and spot the glider 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 | scout tool | glider suit upgrade | glove style | helmet plume | favorite snack |
|---|---|---|---|---|---|
| Zoe | Signal Whistle | Glow Stripes | Full Leather Mitts | Green Leaf Ribbon | Fizzy Berry Juice |
| Wyatt | Signal Whistle | Solar Charger | Full Leather Mitts | Green Leaf Ribbon | Toasted Pumpkin Seeds |
| Liam | Grappling Hook | Glow Stripes | Full Leather Mitts | Bright Red Feather | Maple Sugar Drops |
| Owen | Pocket Compass | Glow Stripes | Full Leather Mitts | Green Leaf Ribbon | Toasted Pumpkin Seeds |
| Sophia | Grappling Hook | Wind Booster | Full Leather Mitts | Bright Red Feather | Maple Sugar Drops |
| Toby | Grappling Hook | Wind Booster | Fingerless Gloves | Green Leaf Ribbon | Toasted Pumpkin Seeds |
| Luke | Flashlight Map | Wind Booster | Full Leather Mitts | Green Leaf Ribbon | Toasted Pumpkin Seeds |
| Jack | Pocket Compass | Glow Stripes | Fingerless Gloves | Bright Red Feather | Fizzy Berry Juice |
| Max | Pocket Compass | Wind Booster | Fingerless Gloves | Green Leaf Ribbon | Maple Sugar Drops |
| Ben | Flashlight Map | Turbo Thrusters | Full Leather Mitts | Blue Neon Tassel | Toasted Pumpkin Seeds |
| Mason | Grappling Hook | Turbo Thrusters | Full Leather Mitts | Blue Neon Tassel | Maple Sugar Drops |
| Leo | Pocket Compass | Solar Charger | Full Leather Mitts | Green Leaf Ribbon | Toasted Pumpkin Seeds |
| Chloe | Signal Whistle | Silent Wings | Full Leather Mitts | Green Leaf Ribbon | Toasted Pumpkin Seeds |
| Finn | Rope Ladder | Glow Stripes | Full Leather Mitts | Bright Red Feather | Fizzy Berry Juice |
| Ava | Flashlight Map | Wind Booster | Fingerless Gloves | Blue Neon Tassel | Maple Sugar Drops |
| Noah | Signal Whistle | Wind Booster | Fingerless Gloves | Bright Red Feather | Toasted Pumpkin Seeds |
| Mia | Rope Ladder | Silent Wings | Fingerless Gloves | Green Leaf Ribbon | Maple Sugar Drops |
| Sam | Flashlight Map | Turbo Thrusters | Full Leather Mitts | Green Leaf Ribbon | Toasted Pumpkin Seeds |
| Emma | Signal Whistle | Silent Wings | Fingerless Gloves | Bright Red Feather | Toasted Pumpkin Seeds |
| Grace | Signal Whistle | Silent Wings | Fingerless Gloves | Green Leaf Ribbon | Toasted Pumpkin Seeds |
| Ella | Flashlight Map | Wind Booster | Fingerless Gloves | Bright Red Feather | Fizzy Berry Juice |
Clue 1
Place value
To unlock the first lock box, we need to read the code on the giant dial. It has digits for hundreds, tens, and ones.
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
600
500
50
T
600
500
70
50
30
4000
800
50
10
6000
800
T
600
5000
10
50
200
10
800
9000
200
90
2000
500
200
90
40
50
90
What is the value of the 6 in 675?T
What is the value of the 5 in 651?E
What is the value of the 2 in 8,297?A
What is the value of the 3 in 7,432?F
What is the value of the 9 in 495?R
What is the value of the 8 in 895?O
What is the value of the 2 in 2,845?C
What is the value of the 9 in 79,238?L
What is the value of the 4 in 64,511?D
What is the value of the 4 in 8,243?G
What is the value of the 5 in 572?H
What is the value of the 7 in 271?I
What is the value of the 6 in 26,177?N
What is the value of the 5 in 5,680?U
What is the value of the 1 in 813?S
0/15 letters found
Clue 2
Addition
We found a pile of lost badges under the big bridge. Let us count them up to see how many scouts passed by 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.
T
699
950
736
342
811
342
685
736
253
T
699
356
736
826
862
736
342
664
470
760
204
664
584
736
829
685
829
204
664
T
699
342
343 + 356 =T
100 + 104 =I
328 + 336 =N
184 + 158 =S
299 + 563 =V
475 + 285 =F
406 + 405 =U
498 + 238 =E
193 + 277 =O
279 + 406 =P
186 + 170 =L
454 + 375 =R
107 + 146 =C
413 + 413 =A
379 + 205 =G
329 + 621 =H
0/16 letters found
Clue 3
Subtraction
The camp cook had a bag of trail mix. Some was taken by the thief, and we must find out how many pieces are left.
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
221
891
327
T
221
891
733
327
759
196
327
759
T
221
617
892
171
309
617
891
347
642
327
327
793
642
891
327
196
196
642
224 - 3 =T
272 - 76 =L
803 - 161 =S
1007 - 248 =F
899 - 106 =D
921 - 304 =C
1074 - 182 =R
430 - 121 =N
1045 - 312 =I
574 - 247 =E
197 - 26 =U
1072 - 181 =H
566 - 219 =Y
0/13 letters found
Clue 4
Multiplication facts (1-12)
Look at the rows of sleeping bags in the cabins. If each row has the same number of bags, we can find the total quickly.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
A
42
44
120
14
70
12
14
60
60
70
14
24
100
100
120
70
10
A
42
18
120
70
44
35
60
2
A
42
44
35
6 × 7 =A
1 × 2 =P
2 × 7 =R
5 × 12 =E
2 × 9 =S
7 × 5 =H
2 × 6 =G
2 × 12 =I
1 × 10 =W
10 × 7 =N
10 × 10 =B
10 × 12 =O
4 × 11 =T
0/13 letters found
Clue 5
Division facts (1-12) — the last clue
We need to share these rescue ropes equally among our team members so everyone has the exact same amount.
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
72 ÷ 12 = ?
3 ÷ 3 = ?
90 ÷ 10 = ?
55 ÷ 11 = ?
96 ÷ 8 = ?
24 ÷ 6 = ?
15 ÷ 5 = ?
70 ÷ 10 = ?
88 ÷ 8 = ?
10 ÷ 5 = ?
88 ÷ 11 = ?
Step 2 — cross out the sentence with each answer
1.The villain checks a brass compass, then flashes bright glow stripes.
2.The villain drops a knotted rope ladder, then speeds up with a wind booster.
3.The villain shines a map light, then glides away with silent wings.
4.The villain checks a brass compass, then speeds up with a wind booster.
5.The villain swings from the high rope, then speeds up with a wind booster.
6.The villain shines a map light, then speeds up with a wind booster.
7.The villain drops a knotted rope ladder, then zooms off using turbo thrusters.
8.The villain checks a brass compass, then glides away with silent wings.
9.The villain shines a map light, then zooms off using turbo thrusters.
10.The villain blows a loud warning signal, then glides away with silent wings.
11.The villain checks a brass compass, then stops to charge in the sun.
12.The villain checks a brass compass, then zooms off using turbo thrusters.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Canopy Cove Mystery
Culprit: Chloe (Signal Whistle · Silent Wings · Full Leather Mitts · Green Leaf Ribbon · Toasted Pumpkin Seeds)
- Clue 1 (Place value): "THE THIEF DOES NOT USE A SOLAR CHARGER"What is the value of the 6 in 675? = 600 (T) · What is the value of the 5 in 651? = 50 (E) · What is the value of the 2 in 8,297? = 200 (A) · What is the value of the 3 in 7,432? = 30 (F) · What is the value of the 9 in 495? = 90 (R) · What is the value of the 8 in 895? = 800 (O) · What is the value of the 2 in 2,845? = 2000 (C) · What is the value of the 9 in 79,238? = 9000 (L) · What is the value of the 4 in 64,511? = 4000 (D) · What is the value of the 4 in 8,243? = 40 (G) · What is the value of the 5 in 572? = 500 (H) · What is the value of the 7 in 271? = 70 (I) · What is the value of the 6 in 26,177? = 6000 (N) · What is the value of the 5 in 5,680? = 5000 (U) · What is the value of the 1 in 813? = 10 (S)
- Clue 2 (Addition): "THE SUSPECT LEAVES NO FINGERPRINTS"343 + 356 = 699 (T) · 100 + 104 = 204 (I) · 328 + 336 = 664 (N) · 184 + 158 = 342 (S) · 299 + 563 = 862 (V) · 475 + 285 = 760 (F) · 406 + 405 = 811 (U) · 498 + 238 = 736 (E) · 193 + 277 = 470 (O) · 279 + 406 = 685 (P) · 186 + 170 = 356 (L) · 454 + 375 = 829 (R) · 107 + 146 = 253 (C) · 413 + 413 = 826 (A) · 379 + 205 = 584 (G) · 329 + 621 = 950 (H)
- Clue 3 (Subtraction): "THE THIEF LEFT CRUNCHY SEED SHELLS"224 - 3 = 221 (T) · 272 - 76 = 196 (L) · 803 - 161 = 642 (S) · 1007 - 248 = 759 (F) · 899 - 106 = 793 (D) · 921 - 304 = 617 (C) · 1074 - 182 = 892 (R) · 430 - 121 = 309 (N) · 1045 - 312 = 733 (I) · 574 - 247 = 327 (E) · 197 - 26 = 171 (U) · 1072 - 181 = 891 (H) · 566 - 219 = 347 (Y)
- Clue 4 (Multiplication facts (1-12)): "A TORN GREEN RIBBON WAS ON THE PATH"6 × 7 = 42 (A) · 1 × 2 = 2 (P) · 2 × 7 = 14 (R) · 5 × 12 = 60 (E) · 2 × 9 = 18 (S) · 7 × 5 = 35 (H) · 2 × 6 = 12 (G) · 2 × 12 = 24 (I) · 1 × 10 = 10 (W) · 10 × 7 = 70 (N) · 10 × 10 = 100 (B) · 10 × 12 = 120 (O) · 4 × 11 = 44 (T)
- Clue 5 (Division facts (1-12)): surviving statement (box 10) → Chloe72 ÷ 12 = 6 · 3 ÷ 3 = 1 · 90 ÷ 10 = 9 · 55 ÷ 11 = 5 · 96 ÷ 8 = 12 · 24 ÷ 6 = 4 · 15 ÷ 5 = 3 · 70 ÷ 10 = 7 · 88 ÷ 8 = 11 · 10 ÷ 5 = 2 · 88 ÷ 11 = 8
About this mystery
- Grade level
- Grade 3 math
- Math topics
- Place value, Addition, Subtraction, Multiplication, Division
- Reading level
- grades 3-4
- Theme
- The Canopy Cove Mystery — set in The Treehouse Kingdom of Canopy Cove
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects