Grade 5Reading: grades 1-2Fractions of a numberOrder of operationsMultiplicationRoundingDivision
The Great Treehouse Heist
Someone took the Golden Walkie-Talkie from the treehouse! We need to find the rogue agent fast. Check the clues and save the day!
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 | Favorite Gadget | Secret Skill | Decoder Pen Color | Wig Color | Favorite Snack |
|---|---|---|---|---|---|
| Sari | grappling hook | quick dash | red ink | lime green wig | choc chip cookies |
| Emma | laser pointer | high jump | blue ink | lime green wig | sour gummies |
| Leo | night goggles | quick dash | red ink | lime green wig | sour gummies |
| Roy | laser pointer | high jump | red ink | lime green wig | sour gummies |
| Max | grappling hook | high jump | blue ink | bright blue wig | cheesy popcorn |
| Otis | spy camera | loud whistle | blue ink | bright blue wig | choc chip cookies |
| Zoe | grappling hook | fast climb | red ink | neon pink wig | choc chip cookies |
| Finn | pocket drone | high jump | blue ink | lime green wig | sour gummies |
| Cody | grappling hook | silent walk | blue ink | neon pink wig | choc chip cookies |
| Ben | laser pointer | loud whistle | red ink | neon pink wig | cheesy popcorn |
| Yara | grappling hook | high jump | blue ink | bright blue wig | sour gummies |
| Amy | spy camera | silent walk | blue ink | bright blue wig | choc chip cookies |
| Jack | laser pointer | high jump | red ink | neon pink wig | sour gummies |
| Jake | night goggles | loud whistle | blue ink | bright blue wig | choc chip cookies |
| Luke | night goggles | high jump | red ink | lime green wig | cheesy popcorn |
| Toby | laser pointer | fast climb | red ink | lime green wig | sour gummies |
| Lily | pocket drone | quick dash | red ink | lime green wig | choc chip cookies |
| Rex | night goggles | loud whistle | red ink | lime green wig | sour gummies |
| Eli | pocket drone | silent walk | red ink | bright blue wig | sour gummies |
| Sam | laser pointer | quick dash | red ink | lime green wig | sour gummies |
| Mia | grappling hook | fast climb | red ink | lime green wig | choc chip cookies |
Clue 1
Fractions of a number
We found a box of decoder cards. Only some of them are marked. Find the fraction 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
37
33
27
26
8
27
38
T
37
19
36
27
23
38
36
T
37
33
26
13
27
26
30
36
21
19
32
33
35
23
T
37
30
27
1/4 of 148 =T
4/5 of 40 =W
2/6 of 108 =O
1/2 of 38 =D
1/5 of 65 =V
5/10 of 60 =L
1/5 of 175 =I
3/6 of 66 =H
1/3 of 63 =U
3/6 of 52 =A
1/2 of 76 =N
4/10 of 20 =G
1/2 of 46 =S
1/3 of 81 =E
0/14 letters found
Clue 2
Order of operations
The spy safe has a big lock. We must solve the steps in the right order 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
37
43
7
21
10
7
70
T
37
33
7
31
T
37
70
32
T
37
7
65
44
70
72
7
9
44
70
75
9 + 7 × 4 =T
6 × 11 - 1 =S
32 + 6 × 2 =I
4 + 9 × 3 =F
7 × 12 - 12 =R
6 × 6 - 29 =E
11 + 8 × 8 =K
5 × 9 - 12 =L
6 × 5 - 21 =D
2 + 2 × 4 =G
11 × 7 - 7 =N
9 + 2 × 6 =A
12 + 4 × 5 =O
8 × 8 - 21 =H
0/14 letters found
Clue 3
Multiplication facts (1-12)
There are neat rows of supply boots in the closet. Counting them up will give us the next hint.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
S
21
121
10
55
7
10
30
30
1
72
55
16
144
144
25
55
S
21
72
25
55
25
121
100
70
45
25
84
60
121
121
55
7 × 3 =S
11 × 5 =R
10 × 3 =M
11 × 11 =O
10 × 10 =N
12 × 12 =P
12 × 6 =W
9 × 5 =H
7 × 12 =F
10 × 1 =U
10 × 7 =T
4 × 4 =A
1 × 1 =Y
5 × 5 =E
1 × 7 =G
6 × 10 =L
0/16 letters found
Clue 4
Rounding
Our radar screen is blurry. It only shows the closest rounded numbers to track 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.
W
430
50
300
70
7000
2900
290
9000
3000
1300
30
50
110
500
50
50
2900
130
2000
500
9000
2900
290
Round 434 to the nearest tenW
Round 8,806 to the nearest thousandA
Round 70 to the nearest tenO
Round 1,332 to the nearest hundredI
Round 2,931 to the nearest hundredN
Round 53 to the nearest tenE
Round 106 to the nearest tenG
Round 313 to the nearest hundredF
Round 130 to the nearest tenS
Round 488 to the nearest hundredR
Round 7,359 to the nearest thousandU
Round 292 to the nearest tenD
Round 2,153 to the nearest thousandT
Round 2,886 to the nearest thousandL
Round 28 to the nearest tenM
0/15 letters found
Clue 5
Division facts (1-12) — the last clue
We need to share the spy badges equally among the team to get our final lead.
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
80 ÷ 8 = ?
108 ÷ 12 = ?
36 ÷ 12 = ?
72 ÷ 9 = ?
30 ÷ 5 = ?
7 ÷ 7 = ?
63 ÷ 9 = ?
5 ÷ 1 = ?
84 ÷ 7 = ?
12 ÷ 3 = ?
99 ÷ 9 = ?
Step 2 — cross out the sentence with each answer
1.The villain launched a pocket drone, then made a fast climb.
2.The villain shined a laser pointer, then did a quick dash.
3.The villain adjusted some night goggles, then did a quick dash.
4.The villain snapped a spy camera, then blew a loud whistle.
5.The villain adjusted some night goggles, then made a fast climb.
6.The villain launched a pocket drone, then did a quick dash.
7.The villain threw a grappling hook, then made a fast climb.
8.The villain shined a laser pointer, then blew a loud whistle.
9.The villain shined a laser pointer, then made a fast climb.
10.The villain shined a laser pointer, then made a high jump.
11.The villain snapped a spy camera, then used a silent walk.
12.The villain adjusted some night goggles, then made a high jump.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Great Treehouse Heist
Culprit: Sam (laser pointer · quick dash · red ink · lime green wig · sour gummies)
- Clue 1 (Fractions of a number): "THE AGENT DOES NOT HAVE A LOUD WHISTLE"1/4 of 148 = 37 (T) · 4/5 of 40 = 32 (W) · 2/6 of 108 = 36 (O) · 1/2 of 38 = 19 (D) · 1/5 of 65 = 13 (V) · 5/10 of 60 = 30 (L) · 1/5 of 175 = 35 (I) · 3/6 of 66 = 33 (H) · 1/3 of 63 = 21 (U) · 3/6 of 52 = 26 (A) · 1/2 of 76 = 38 (N) · 4/10 of 20 = 8 (G) · 1/2 of 46 = 23 (S) · 1/3 of 81 = 27 (E)
- Clue 2 (Order of operations): "THE AGENT LEFT NOTES IN RED INK"9 + 7 × 4 = 37 (T) · 6 × 11 - 1 = 65 (S) · 32 + 6 × 2 = 44 (I) · 4 + 9 × 3 = 31 (F) · 7 × 12 - 12 = 72 (R) · 6 × 6 - 29 = 7 (E) · 11 + 8 × 8 = 75 (K) · 5 × 9 - 12 = 33 (L) · 6 × 5 - 21 = 9 (D) · 2 + 2 × 4 = 10 (G) · 11 × 7 - 7 = 70 (N) · 9 + 2 × 6 = 21 (A) · 12 + 4 × 5 = 32 (O) · 8 × 8 - 21 = 43 (H)
- Clue 3 (Multiplication facts (1-12)): "SOUR GUMMY WRAPPERS WERE ON THE FLOOR"7 × 3 = 21 (S) · 11 × 5 = 55 (R) · 10 × 3 = 30 (M) · 11 × 11 = 121 (O) · 10 × 10 = 100 (N) · 12 × 12 = 144 (P) · 12 × 6 = 72 (W) · 9 × 5 = 45 (H) · 7 × 12 = 84 (F) · 10 × 1 = 10 (U) · 10 × 7 = 70 (T) · 4 × 4 = 16 (A) · 1 × 1 = 1 (Y) · 5 × 5 = 25 (E) · 1 × 7 = 7 (G) · 6 × 10 = 60 (L)
- Clue 4 (Rounding): "WE FOUND A LIME GREEN STRAND"Round 434 to the nearest ten = 430 (W) · Round 8,806 to the nearest thousand = 9000 (A) · Round 70 to the nearest ten = 70 (O) · Round 1,332 to the nearest hundred = 1300 (I) · Round 2,931 to the nearest hundred = 2900 (N) · Round 53 to the nearest ten = 50 (E) · Round 106 to the nearest ten = 110 (G) · Round 313 to the nearest hundred = 300 (F) · Round 130 to the nearest ten = 130 (S) · Round 488 to the nearest hundred = 500 (R) · Round 7,359 to the nearest thousand = 7000 (U) · Round 292 to the nearest ten = 290 (D) · Round 2,153 to the nearest thousand = 2000 (T) · Round 2,886 to the nearest thousand = 3000 (L) · Round 28 to the nearest ten = 30 (M)
- Clue 5 (Division facts (1-12)): surviving statement (box 2) → Sam80 ÷ 8 = 10 · 108 ÷ 12 = 9 · 36 ÷ 12 = 3 · 72 ÷ 9 = 8 · 30 ÷ 5 = 6 · 7 ÷ 7 = 1 · 63 ÷ 9 = 7 · 5 ÷ 1 = 5 · 84 ÷ 7 = 12 · 12 ÷ 3 = 4 · 99 ÷ 9 = 11
About this mystery
- Grade level
- Grade 5 math
- Math topics
- Fractions of a number, Order of operations, Multiplication, Rounding, Division
- Reading level
- grades 1-2
- Theme
- The Great Treehouse Heist — set in Clubhouse Sector Seven
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects