Grade 3Reading: grades 3-4RoundingSkip countingBar modelsMulti-step word problemsDivision
The Secret of Sunstone Valley
A sneaky bandit slipped into the campsite at midnight and took the rare artifact!
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 | Main Tool | Loot Item | Dominant Hand | Hair Style | Weakness |
|---|---|---|---|---|---|
| Grace | Rope Launcher | Crystal Skull | Right Handed | Short Hair | Bright Light |
| Milo | Rope Launcher | Ruby Key | Right Handed | Short Hair | Bright Light |
| Ben | Glider Wings | Crystal Skull | Right Handed | Short Hair | Loud Whistle |
| Aria | Compass Watch | Crystal Skull | Right Handed | Braided Hair | Sticky Mud |
| Maya | Compass Watch | Stone Compass | Left Handed | Short Hair | Bright Light |
| Owen | Glider Wings | Stone Compass | Right Handed | Short Hair | Bright Light |
| Luke | Rope Launcher | Ruby Key | Left Handed | Curly Hair | Bright Light |
| Nora | Grappling Hook | Ruby Key | Left Handed | Short Hair | Loud Whistle |
| Eli | Compass Watch | Crystal Skull | Left Handed | Short Hair | Loud Whistle |
| Ella | Compass Watch | Map Scroll | Right Handed | Short Hair | Bright Light |
| Ruby | Flash Lantern | Golden Idol | Right Handed | Braided Hair | Bright Light |
| Mia | Rope Launcher | Stone Compass | Right Handed | Short Hair | Bright Light |
| Ivy | Glider Wings | Golden Idol | Right Handed | Short Hair | Sticky Mud |
| Kai | Glider Wings | Crystal Skull | Left Handed | Curly Hair | Loud Whistle |
| Ava | Glider Wings | Crystal Skull | Right Handed | Braided Hair | Bright Light |
| Finn | Rope Launcher | Ruby Key | Right Handed | Short Hair | Sticky Mud |
| Lily | Rope Launcher | Map Scroll | Right Handed | Short Hair | Loud Whistle |
| Zoe | Rope Launcher | Stone Compass | Left Handed | Short Hair | Bright Light |
| Leo | Glider Wings | Ruby Key | Right Handed | Curly Hair | Loud Whistle |
| Liam | Flash Lantern | Crystal Skull | Left Handed | Curly Hair | Bright Light |
| Jack | Glider Wings | Stone Compass | Right Handed | Curly Hair | Bright Light |
Clue 1
Rounding
The expedition scanner rounds distance values to the nearest ten.
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
2000
9000
5000
300
20
4000
6000
5000
80
20
5000
50
60
20
T
2000
500
7000
300
300
800
7000
300
6000
3000
800
700
5000
800
Round 2,290 to the nearest thousandT
Round 781 to the nearest hundredY
Round 53 to the nearest tenS
Round 83 to the nearest tenD
Round 6,214 to the nearest thousandU
Round 667 to the nearest hundredK
Round 456 to the nearest hundredC
Round 7,091 to the nearest thousandA
Round 18 to the nearest tenO
Round 3,305 to the nearest thousandB
Round 8,562 to the nearest thousandH
Round 312 to the nearest hundredR
Round 3,803 to the nearest thousandG
Round 56 to the nearest tenN
Round 4,587 to the nearest thousandE
0/15 letters found
Clue 2
Skip counting
The ranger counts footprints along the trail by skip counting.
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
110
60
50
12
24
9
9
16
24
20
22
16
65
65
25
140
T
110
T
110
50
8
10
65
24
20
15
T
110
60
50
24
130
130
24
15
60
T
110
60
16
20
8
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130T
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, ___, 27, 30I
Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12D
Skip-count by 5s. Fill the blank: 5, 10, ___, 20, 25G
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20A
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, ___, 22, 24N
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, ___, 14, 16V
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, ___, 65, 70H
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, ___, 24, 26W
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, ___, 70, 75S
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, ___, 150, 160O
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, ___, 30, 35P
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14U
Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15L
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, ___, 55, 60E
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, ___, 140, 150R
0/16 letters found
Clue 3
Bar model word problems
The mapmaker draws bar models to compare supply crates.
Draw a bar model to solve each word problem. Its answer reveals a letter — write the letters in the boxes to fill in the missing word.
Someonescaredthevillainoffwith.
B
53
17
6
56
30
34
36
6
56
30
34
Scout has 212 lanterns, packed 4 to a bag. How many bags can be filled?
draw a bar model
Answer:→B
Scout has 8 times as many trail maps as a teammate. The teammate has 7 trail maps. How many trail maps does scout have?
draw a bar model
Answer:→G
Scout shares 240 canteen cups equally among 8 teams. How many canteen cups does each team get?
draw a bar model
Answer:→H
There were 74 compasses in all. 40 compasses were used. How many compasses are left?
draw a bar model
Answer:→T
One group collected 31 lanterns and another group collected 5 lanterns. How many lanterns in all?
draw a bar model
Answer:→L
The red team has 51 canteen cups and the blue team has 34 canteen cups. How many more canteen cups does the red team have?
draw a bar model
Answer:→R
Scout has 72 climbing ropes, packed 12 to a bag. How many bags can be filled?
draw a bar model
Answer:→I
0/7 letters found
Clue 4
Multi-step word problems
The camp director solves word problems to track daily supplies.
Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.
Astrandofhairturnedupatthescene.
S
19
13
32
16
20
13
28
39
16
There were 99 trail maps in all. 4 trail maps were set aside. The rest were shared equally among 5 Exploration Team. How many trail maps did each get?S
Scout collected 27 canteen cups in the morning and 141 canteen cups in the afternoon, then split them equally among 6 Exploration Team. How many canteen cups did each get?A
Scout collected 40 canteen cups in the morning and 8 canteen cups in the afternoon, then split them equally among 3 Exploration Team. How many canteen cups did each get?R
Scout earned 7 lanterns in each of 2 rounds, plus 33 bonus lanterns. Then 15 lanterns were lost. How many lanterns are left?O
There were 157 climbing ropes in all. 17 climbing ropes were set aside. The rest were shared equally among 7 Exploration Team. How many climbing ropes did each get?T
There were 154 lanterns in all. 37 lanterns were set aside. The rest were shared equally among 9 Exploration Team. How many lanterns did each get?H
There were 201 canteen cups in all. 3 Exploration Team used 28 canteen cups each. The other 3 Exploration Team shared the rest equally. How many canteen cups did each of the other Exploration Team get?I
0/7 letters found
Clue 5
Division facts (1-12) — the last clue
The team splits discovery badges equally among the scouts.
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
7 ÷ 1 = ?
48 ÷ 12 = ?
36 ÷ 3 = ?
110 ÷ 10 = ?
48 ÷ 6 = ?
18 ÷ 3 = ?
25 ÷ 5 = ?
18 ÷ 9 = ?
12 ÷ 12 = ?
27 ÷ 3 = ?
27 ÷ 9 = ?
Step 2 — cross out the sentence with each answer
1.The villain shined a flash lantern in the dark, then snatched the map scroll.
2.The villain shined a flash lantern in the dark, then pocketed the crystal skull.
3.The villain soared with glider wings above, then snatched the map scroll.
4.The villain soared with glider wings above, then turned the stone compass.
5.The villain used a grappling hook to climb, then pocketed the crystal skull.
6.The villain fired a rope launcher across, then unlocked with the ruby key.
7.The villain fired a rope launcher across, then turned the stone compass.
8.The villain shined a flash lantern in the dark, then turned the stone compass.
9.The villain fired a rope launcher across, then snatched the map scroll.
10.The villain fired a rope launcher across, then pocketed the crystal skull.
11.The villain used a grappling hook to climb, then unlocked with the ruby key.
12.The villain checked a compass watch to navigate, then snatched the map scroll.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Secret of Sunstone Valley
Culprit: Grace (Rope Launcher · Crystal Skull · Right Handed · Short Hair · Bright Light)
- Clue 1 (Rounding): "THE ROGUE DOES NOT CARRY A RUBY KEY"Round 2,290 to the nearest thousand = 2000 (T) · Round 781 to the nearest hundred = 800 (Y) · Round 53 to the nearest ten = 50 (S) · Round 83 to the nearest ten = 80 (D) · Round 6,214 to the nearest thousand = 6000 (U) · Round 667 to the nearest hundred = 700 (K) · Round 456 to the nearest hundred = 500 (C) · Round 7,091 to the nearest thousand = 7000 (A) · Round 18 to the nearest ten = 20 (O) · Round 3,305 to the nearest thousand = 3000 (B) · Round 8,562 to the nearest thousand = 9000 (H) · Round 312 to the nearest hundred = 300 (R) · Round 3,803 to the nearest thousand = 4000 (G) · Round 56 to the nearest ten = 60 (N) · Round 4,587 to the nearest thousand = 5000 (E)
- Clue 2 (Skip counting): "THE VILLAIN WAS SPOTTED USING THEIR RIGHT HAND"Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130 = 110 (T) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, ___, 27, 30 = 24 (I) · Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12 = 8 (D) · Skip-count by 5s. Fill the blank: 5, 10, ___, 20, 25 = 15 (G) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20 = 16 (A) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, ___, 22, 24 = 20 (N) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, ___, 14, 16 = 12 (V) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, ___, 65, 70 = 60 (H) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, ___, 24, 26 = 22 (W) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, ___, 70, 75 = 65 (S) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, ___, 150, 160 = 140 (O) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, ___, 30, 35 = 25 (P) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14 = 10 (U) · Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15 = 9 (L) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, ___, 55, 60 = 50 (E) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, ___, 140, 150 = 130 (R)
- Clue 3 (Bar model word problems): "BRIGHT LIGHT"Scout has 212 lanterns, packed 4 to a bag. How many bags can be filled? = 53 (B) · Scout has 8 times as many trail maps as a teammate. The teammate has 7 trail maps. How many trail maps does scout have? = 56 (G) · Scout shares 240 canteen cups equally among 8 teams. How many canteen cups does each team get? = 30 (H) · There were 74 compasses in all. 40 compasses were used. How many compasses are left? = 34 (T) · One group collected 31 lanterns and another group collected 5 lanterns. How many lanterns in all? = 36 (L) · The red team has 51 canteen cups and the blue team has 34 canteen cups. How many more canteen cups does the red team have? = 17 (R) · Scout has 72 climbing ropes, packed 12 to a bag. How many bags can be filled? = 6 (I)
- Clue 4 (Multi-step word problems): "SHORT HAIR"There were 99 trail maps in all. 4 trail maps were set aside. The rest were shared equally among 5 Exploration Team. How many trail maps did each get? = 19 (S) · Scout collected 27 canteen cups in the morning and 141 canteen cups in the afternoon, then split them equally among 6 Exploration Team. How many canteen cups did each get? = 28 (A) · Scout collected 40 canteen cups in the morning and 8 canteen cups in the afternoon, then split them equally among 3 Exploration Team. How many canteen cups did each get? = 16 (R) · Scout earned 7 lanterns in each of 2 rounds, plus 33 bonus lanterns. Then 15 lanterns were lost. How many lanterns are left? = 32 (O) · There were 157 climbing ropes in all. 17 climbing ropes were set aside. The rest were shared equally among 7 Exploration Team. How many climbing ropes did each get? = 20 (T) · There were 154 lanterns in all. 37 lanterns were set aside. The rest were shared equally among 9 Exploration Team. How many lanterns did each get? = 13 (H) · There were 201 canteen cups in all. 3 Exploration Team used 28 canteen cups each. The other 3 Exploration Team shared the rest equally. How many canteen cups did each of the other Exploration Team get? = 39 (I)
- Clue 5 (Division facts (1-12)): surviving statement (box 10) → Grace7 ÷ 1 = 7 · 48 ÷ 12 = 4 · 36 ÷ 3 = 12 · 110 ÷ 10 = 11 · 48 ÷ 6 = 8 · 18 ÷ 3 = 6 · 25 ÷ 5 = 5 · 18 ÷ 9 = 2 · 12 ÷ 12 = 1 · 27 ÷ 3 = 9 · 27 ÷ 9 = 3
About this mystery
- Grade level
- Grade 3 math
- Math topics
- Rounding, Skip counting, Bar models, Multi-step word problems, Division
- Reading level
- grades 3-4
- Theme
- The Secret of Sunstone Valley — set in Sunstone Valley Jungle
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects