Grade 6Reading: grades 5-6Place valueMultiplicationRoundingMulti-step word problemsDivision
The Lost Idol of Sunstone Valley
During a midnight storm at Sunstone Valley, an ancient golden idol vanished from the main tent! Detective Sam arrived at daybreak to analyze trail evidence, decode encoded notes, and identify the thief among the twenty-four expedition members.
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 | Specialty Equipment | Secondary Gadget | Dominant Hand | Hairstyle | Vulnerability |
|---|---|---|---|---|---|
| Soren Lind | Decryption Tablet | Glider Wings | Right Handed | Braided Hair | Loud Sound |
| Hugo Mercer | Grappling Hook | Smoke Bomb | Left Handed | Curly Hair | Loud Sound |
| Ulysses Vance | Grappling Hook | Magnetic Compass | Right Handed | Spiky Hair | Bright Light |
| Brody Vance | Sonic Whistle | Zipline Cable | Right Handed | Curly Hair | Loud Sound |
| Wyatt Hayes | Decryption Tablet | Signal Flare | Left Handed | Braided Hair | Loud Sound |
| Gemma Cross | Sonic Whistle | Magnetic Compass | Left Handed | Spiky Hair | Loud Sound |
| Nico Silva | Thermal Goggles | Signal Flare | Left Handed | Curly Hair | Loud Sound |
| Maya Lin | Thermal Goggles | Magnetic Compass | Right Handed | Braided Hair | Bright Light |
| Zoe Castellan | Thermal Goggles | Zipline Cable | Left Handed | Curly Hair | Freezing Air |
| Leo Sterling | Sonic Whistle | Glider Wings | Right Handed | Braided Hair | Loud Sound |
| Diego Reyes | Thermal Goggles | Magnetic Compass | Left Handed | Curly Hair | Bright Light |
| Talia Alva | Climbing Claws | Smoke Bomb | Left Handed | Spiky Hair | Loud Sound |
| Elena Rostova | Decryption Tablet | Magnetic Compass | Left Handed | Curly Hair | Loud Sound |
| Iris Thorne | Climbing Claws | Signal Flare | Right Handed | Spiky Hair | Loud Sound |
| Paolo Rossi | Thermal Goggles | Glider Wings | Left Handed | Curly Hair | Loud Sound |
| Amelia Stone | Decryption Tablet | Magnetic Compass | Right Handed | Spiky Hair | Loud Sound |
| Valerie Frost | Climbing Claws | Smoke Bomb | Right Handed | Braided Hair | Loud Sound |
| Quinn Harper | Climbing Claws | Glider Wings | Left Handed | Curly Hair | Bright Light |
| Rhea Patel | Thermal Goggles | Signal Flare | Right Handed | Spiky Hair | Bright Light |
| Olivia Wilde | Grappling Hook | Signal Flare | Left Handed | Braided Hair | Freezing Air |
| Jasper Drake | Thermal Goggles | Magnetic Compass | Left Handed | Curly Hair | Loud Sound |
Clue 1
Place value
To unlock the emergency supply vault, Detective Sam must analyze the digit values on the digital keypad lock.
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
80
500
800
30
6000
30
50
800
7000
T
80
90
600
800
30
5000
600
T
80
6000
30
800
30
60
600
100
800
400
600
60
400
30
What is the value of the 8 in 109,684?T
What is the value of the 5 in 384,757?P
What is the value of the 8 in 11,831?E
What is the value of the 6 in 46,871?U
What is the value of the 3 in 957,239?S
What is the value of the 9 in 45,198?D
What is the value of the 6 in 37,168?M
What is the value of the 7 in 637,189?C
What is the value of the 6 in 433,617?O
What is the value of the 1 in 72,100?K
What is the value of the 4 in 98,490?B
What is the value of the 5 in 825,613?N
What is the value of the 5 in 298,576?H
0/13 letters found
Clue 2
Multiplication facts (1-12)
Sam counts rows of supply crates packed tightly inside the stolen gear tent to verify inventory.
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
21
55
14
80
2
T
21
108
14
90
90
90
144
80
144
50
14
44
T
21
55
144
108
10
14
10
T
21
55
2
14
44
7 × 3 =T
2 × 7 =E
10 × 9 =S
5 × 2 =D
10 × 5 =L
10 × 8 =W
12 × 9 =N
2 × 1 =I
5 × 11 =H
12 × 12 =A
4 × 11 =F
0/11 letters found
Clue 3
Rounding
The scout radar system only displays estimated distance readings rounded to the nearest thousand.
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
5000
2900
370
2000
3700
1100
1100
2300
3700
30
3700
700
290
9000
3700
1100
370
3000
130
70
1100
9000
300
3000
700
9000
300
30
3000
Round 5,455 to the nearest thousandT
Round 3,153 to the nearest thousandD
Round 369 to the nearest tenE
Round 675 to the nearest hundredS
Round 127 to the nearest tenB
Round 2,891 to the nearest hundredH
Round 294 to the nearest tenF
Round 28 to the nearest tenN
Round 8,773 to the nearest thousandO
Round 72 to the nearest tenY
Round 1,056 to the nearest hundredL
Round 1,691 to the nearest thousandV
Round 330 to the nearest hundredU
Round 2,308 to the nearest hundredA
Round 3,714 to the nearest hundredI
0/15 letters found
Clue 4
Multi-step word problems
Sam calculates gear weight limits and transport costs through a series of expedition records.
Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.
Astrandof hairturnedupatthescene.
C
85
70
84
57
75
77
67
I
84
There were 859 climbing ropes in all. 9 climbing ropes were set aside. The rest were shared equally among 10 expedition team. How many climbing ropes did each get?C
There were 316 gold coins in all. 1 expedition team used 16 gold coins each. The other 4 expedition team shared the rest equally. How many gold coins did each of the other expedition team get?Y
There were 249 gold coins in all. 3 expedition team used 7 gold coins each. The other 4 expedition team shared the rest equally. How many gold coins did each of the other expedition team get?L
Explorer earned 7 bronze statues in each of 5 rounds, plus 54 bonus bronze statues. Then 12 bronze statues were lost. How many bronze statues are left?H
Explorer earned 7 gold coins in each of 6 rounds, plus 34 bonus gold coins. Then 9 gold coins were lost. How many gold coins are left?A
Explorer collected 9 ruby gems in the morning and 159 ruby gems in the afternoon, then split them equally among 2 expedition team. How many ruby gems did each get?R
There were 701 ruby gems in all. 1 ruby gems were set aside. The rest were shared equally among 10 expedition team. How many ruby gems did each get?U
0/7 letters found
Clue 5
Division facts (1-12) — the last clue
To organize search patrols evenly, total search grid miles must be split among rescue teams.
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
12 ÷ 6 = ?
28 ÷ 7 = ?
99 ÷ 9 = ?
64 ÷ 8 = ?
5 ÷ 1 = ?
108 ÷ 12 = ?
110 ÷ 11 = ?
6 ÷ 1 = ?
72 ÷ 6 = ?
84 ÷ 12 = ?
2 ÷ 2 = ?
Step 2 — cross out the sentence with each answer
1.The villain uses climbing claws to scale cliffs, then attaches a zipline cable.
2.The villain scans terrain with thermal goggles, then unfurls glider wings.
3.The villain decodes locks with a decryption tablet, then consults a magnetic compass.
4.The villain scans terrain with thermal goggles, then consults a magnetic compass.
5.The villain uses a sonic whistle to signal allies, then unfurls glider wings.
6.The villain scans terrain with thermal goggles, then deploys a smoke bomb.
7.The villain uses climbing claws to scale cliffs, then ignites a signal flare.
8.The villain uses climbing claws to scale cliffs, then deploys a smoke bomb.
9.The villain scans terrain with thermal goggles, then attaches a zipline cable.
10.The villain uses a sonic whistle to signal allies, then ignites a signal flare.
11.The villain scans terrain with thermal goggles, then ignites a signal flare.
12.The villain uses a sonic whistle to signal allies, then attaches a zipline cable.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Lost Idol of Sunstone Valley
Culprit: Elena Rostova (Decryption Tablet · Magnetic Compass · Left Handed · Curly Hair · Loud Sound)
- Clue 1 (Place value): "THE SUSPECT DOES NOT USE SMOKE BOMBS"What is the value of the 8 in 109,684? = 80 (T) · What is the value of the 5 in 384,757? = 50 (P) · What is the value of the 8 in 11,831? = 800 (E) · What is the value of the 6 in 46,871? = 6000 (U) · What is the value of the 3 in 957,239? = 30 (S) · What is the value of the 9 in 45,198? = 90 (D) · What is the value of the 6 in 37,168? = 60 (M) · What is the value of the 7 in 637,189? = 7000 (C) · What is the value of the 6 in 433,617? = 600 (O) · What is the value of the 1 in 72,100? = 100 (K) · What is the value of the 4 in 98,490? = 400 (B) · What is the value of the 5 in 825,613? = 5000 (N) · What is the value of the 5 in 298,576? = 500 (H)
- Clue 2 (Multiplication facts (1-12)): "THE WITNESS SAW A LEFT HANDED THIEF"7 × 3 = 21 (T) · 2 × 7 = 14 (E) · 10 × 9 = 90 (S) · 5 × 2 = 10 (D) · 10 × 5 = 50 (L) · 10 × 8 = 80 (W) · 12 × 9 = 108 (N) · 2 × 1 = 2 (I) · 5 × 11 = 55 (H) · 12 × 12 = 144 (A) · 4 × 11 = 44 (F)
- Clue 3 (Rounding): "THE VILLAIN IS FOILED BY LOUD SOUND"Round 5,455 to the nearest thousand = 5000 (T) · Round 3,153 to the nearest thousand = 3000 (D) · Round 369 to the nearest ten = 370 (E) · Round 675 to the nearest hundred = 700 (S) · Round 127 to the nearest ten = 130 (B) · Round 2,891 to the nearest hundred = 2900 (H) · Round 294 to the nearest ten = 290 (F) · Round 28 to the nearest ten = 30 (N) · Round 8,773 to the nearest thousand = 9000 (O) · Round 72 to the nearest ten = 70 (Y) · Round 1,056 to the nearest hundred = 1100 (L) · Round 1,691 to the nearest thousand = 2000 (V) · Round 330 to the nearest hundred = 300 (U) · Round 2,308 to the nearest hundred = 2300 (A) · Round 3,714 to the nearest hundred = 3700 (I)
- Clue 4 (Multi-step word problems): "CURLY HAIR"There were 859 climbing ropes in all. 9 climbing ropes were set aside. The rest were shared equally among 10 expedition team. How many climbing ropes did each get? = 85 (C) · There were 316 gold coins in all. 1 expedition team used 16 gold coins each. The other 4 expedition team shared the rest equally. How many gold coins did each of the other expedition team get? = 75 (Y) · There were 249 gold coins in all. 3 expedition team used 7 gold coins each. The other 4 expedition team shared the rest equally. How many gold coins did each of the other expedition team get? = 57 (L) · Explorer earned 7 bronze statues in each of 5 rounds, plus 54 bonus bronze statues. Then 12 bronze statues were lost. How many bronze statues are left? = 77 (H) · Explorer earned 7 gold coins in each of 6 rounds, plus 34 bonus gold coins. Then 9 gold coins were lost. How many gold coins are left? = 67 (A) · Explorer collected 9 ruby gems in the morning and 159 ruby gems in the afternoon, then split them equally among 2 expedition team. How many ruby gems did each get? = 84 (R) · There were 701 ruby gems in all. 1 ruby gems were set aside. The rest were shared equally among 10 expedition team. How many ruby gems did each get? = 70 (U)
- Clue 5 (Division facts (1-12)): surviving statement (box 3) → Elena Rostova12 ÷ 6 = 2 · 28 ÷ 7 = 4 · 99 ÷ 9 = 11 · 64 ÷ 8 = 8 · 5 ÷ 1 = 5 · 108 ÷ 12 = 9 · 110 ÷ 11 = 10 · 6 ÷ 1 = 6 · 72 ÷ 6 = 12 · 84 ÷ 12 = 7 · 2 ÷ 2 = 1
About this mystery
- Grade level
- Grade 6 math
- Math topics
- Place value, Multiplication, Rounding, Multi-step word problems, Division
- Reading level
- grades 5-6
- Theme
- The Lost Idol of Sunstone Valley — set in Sunstone Valley Archaeology Camp
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects