Grade 6Reading: grades 5-6Place valueFractions of a numberWord problemsMultiplication
The Mystery of the Sunken Sun Stone
During a midnight expedition into the Coban ruins, someone breached the vault and snatched the ancient Sun Stone. Five rival explorers were spotted near the inner chamber. Solve the clues to unmask the culprit!
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 | Tool | Gear | Grip | Hat Color | Fear |
|---|---|---|---|---|---|
| Chloe Finch | Grappling Hook | Brass Goggles | Left Handed | Green Beret | Fear Of Bats |
| Nora Drake | Smoke Bomb | Brass Goggles | Left Handed | Tan Fedora | Fear Of Bats |
| Ethan Huntley | Grappling Hook | Explorer Boots | Right Handed | Brown Cap | Fear Of Bats |
| Leo Vance | Smoke Bomb | Explorer Boots | Right Handed | Green Beret | Fear Of Spiders |
| Iris Vance | Smoke Bomb | Compass Badge | Left Handed | Green Beret | Fear Of Bats |
| Lily Chen | Decoder Ring | Map Case | Right Handed | Green Beret | Fear Of Snakes |
| Henry Cross | Torch Lantern | Signal Whistle | Right Handed | Tan Fedora | Fear Of Snakes |
| Caleb Frost | Torch Lantern | Explorer Boots | Right Handed | Green Beret | Fear Of Spiders |
| Hannah Abbott | Decoder Ring | Brass Goggles | Right Handed | Brown Cap | Fear Of Bats |
| Ruby Paxton | Machete | Signal Whistle | Left Handed | Brown Cap | Fear Of Bats |
| Diego Reyes | Grappling Hook | Map Case | Left Handed | Green Beret | Fear Of Snakes |
| Oscar Wilde | Grappling Hook | Compass Badge | Right Handed | Tan Fedora | Fear Of Snakes |
| Ivy Rhodes | Smoke Bomb | Map Case | Right Handed | Tan Fedora | Fear Of Spiders |
| Maya Cruz | Smoke Bomb | Brass Goggles | Right Handed | Green Beret | Fear Of Bats |
| Victor Stone | Machete | Map Case | Left Handed | Green Beret | Fear Of Bats |
| Elena Santos | Smoke Bomb | Map Case | Right Handed | Green Beret | Fear Of Snakes |
| Sam Sterling | Decoder Ring | Brass Goggles | Left Handed | Green Beret | Fear Of Bats |
| Jasper Cole | Torch Lantern | Signal Whistle | Right Handed | Brown Cap | Fear Of Spiders |
| Felix Rivera | Decoder Ring | Brass Goggles | Right Handed | Green Beret | Fear Of Spiders |
| Marcus Brody | Decoder Ring | Explorer Boots | Left Handed | Green Beret | Fear Of Bats |
| Owen Mercer | Torch Lantern | Explorer Boots | Left Handed | Tan Fedora | Fear Of Spiders |
Clue 1
Place value
Analyzing the digital vault readout reveals place values that point to our 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
400
10
60
2000
6000
50
50
1000
6000
8000
80
100
60
900
8000
100
T
400
500
60
1000
7000
60
700
30
50
100
7000
60
7000
70
100
100
T
400
900
What is the value of the 4 in 79,429?T
What is the value of the 1 in 466,610?H
What is the value of the 7 in 147,104?R
What is the value of the 5 in 796,252?L
What is the value of the 1 in 451,070?A
What is the value of the 5 in 240,506?W
What is the value of the 8 in 38,555?N
What is the value of the 1 in 968,173?O
What is the value of the 7 in 334,876?B
What is the value of the 3 in 87,830?P
What is the value of the 7 in 63,709?X
What is the value of the 9 in 557,920?S
What is the value of the 6 in 95,160?E
What is the value of the 8 in 10,081?D
What is the value of the 2 in 542,807?V
What is the value of the 6 in 76,299?I
0/16 letters found
Clue 2
Fractions of a number
Checking the fraction of ancient coins left in the supply chest uncovers another lead.
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
4
2
20
22
19
23
23
3
19
37
8
28
19
T
4
20
32
8
19
T
4
2
3
23
20
36
T
4
2
3
37
16
20
16
31
28
19
30
2/6 of 12 =T
1/6 of 186 =G
5/8 of 32 =E
2/6 of 84 =R
1/6 of 18 =A
2/3 of 48 =S
4/8 of 32 =D
1/3 of 57 =I
1/4 of 120 =P
4/6 of 3 =H
1/8 of 64 =W
2/6 of 111 =N
1/4 of 144 =F
1/3 of 69 =L
2/6 of 66 =V
0/15 letters found
Clue 3
Word problems
Solving the puzzle journal entries from the temple guard provides important evidence.
Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.
Someonescaredthevillainoffwith .
F
23
42
33
13
72
F
23
96
33
61
S
Trail guide found 2 flint tools yesterday and 21 more today. How many flint tools in all?F
Trail guide found 22 bronze idols yesterday and 20 more today. How many bronze idols in all?E
Trail guide found 10 ancient maps yesterday and 51 more today. How many ancient maps in all?T
Trail guide lined up 12 rows of 6 bronze idols. How many bronze idols in all?O
There were 106 bronze idols. 10 were used up. How many bronze idols are left?B
Trail guide found 11 flint tools yesterday and 2 more today. How many flint tools in all?R
Trail guide lined up 11 rows of 3 flint tools. How many flint tools in all?A
0/7 letters found
Clue 4
Multiplication facts (1-12)
Counting the total tiles across the temple grid room narrows down the suspect list.
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
66
5
120
21
21
90
70
21
120
21
4
28
A
66
24
50
21
49
4
70
21
48
45
90
44
45
90
44
45
120
4
11 × 6 =A
7 × 10 =B
5 × 1 =G
1 × 4 =T
4 × 11 =D
12 × 10 =R
3 × 7 =E
5 × 10 =L
5 × 9 =I
7 × 4 =W
7 × 7 =F
6 × 8 =H
2 × 12 =S
9 × 10 =N
0/14 letters found
Clue 5
Fractions of a number — the last clue
Calculating the fraction of camp rations consumed reveals the final key details.
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
1/4 of 4 = ?
1/8 of 32 = ?
2/6 of 6 = ?
1/5 of 50 = ?
4/8 of 10 = ?
3/10 of 20 = ?
2/6 of 33 = ?
1/3 of 21 = ?
2/5 of 20 = ?
5/10 of 24 = ?
2/6 of 27 = ?
Step 2 — cross out the sentence with each answer
1.The villain cleared the heavy vines with a sharp machete, then safeguarded the old parchment in a map case.
2.The villain swung across the chasm with a grappling hook, then scouted the dark ruin with brass goggles.
3.The villain escaped through the corridor with a smoke bomb, then checked direction with a compass badge.
4.The villain unlocked the stone door with a decoder ring, then scouted the dark ruin with brass goggles.
5.The villain escaped through the corridor with a smoke bomb, then signaled their partner with a signal whistle.
6.The villain swung across the chasm with a grappling hook, then marched through the mud in explorer boots.
7.The villain cleared the heavy vines with a sharp machete, then checked direction with a compass badge.
8.The villain lit the dark passageway with a torch lantern, then checked direction with a compass badge.
9.The villain lit the dark passageway with a torch lantern, then signaled their partner with a signal whistle.
10.The villain lit the dark passageway with a torch lantern, then marched through the mud in explorer boots.
11.The villain cleared the heavy vines with a sharp machete, then scouted the dark ruin with brass goggles.
12.The villain cleared the heavy vines with a sharp machete, then marched through the mud in explorer boots.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Mystery of the Sunken Sun Stone
Culprit: Iris Vance (Smoke Bomb · Compass Badge · Left Handed · Green Beret · Fear Of Bats)
- Clue 1 (Place value): "THE VILLAIN DOES NOT WEAR EXPLORER BOOTS"What is the value of the 4 in 79,429? = 400 (T) · What is the value of the 1 in 466,610? = 10 (H) · What is the value of the 7 in 147,104? = 7000 (R) · What is the value of the 5 in 796,252? = 50 (L) · What is the value of the 1 in 451,070? = 1000 (A) · What is the value of the 5 in 240,506? = 500 (W) · What is the value of the 8 in 38,555? = 8000 (N) · What is the value of the 1 in 968,173? = 100 (O) · What is the value of the 7 in 334,876? = 70 (B) · What is the value of the 3 in 87,830? = 30 (P) · What is the value of the 7 in 63,709? = 700 (X) · What is the value of the 9 in 557,920? = 900 (S) · What is the value of the 6 in 95,160? = 60 (E) · What is the value of the 8 in 10,081? = 80 (D) · What is the value of the 2 in 542,807? = 2000 (V) · What is the value of the 6 in 76,299? = 6000 (I)
- Clue 2 (Fractions of a number): "THE VILLAIN WRITES WITH A LEFT HANDED GRIP"2/6 of 12 = 4 (T) · 1/6 of 186 = 31 (G) · 5/8 of 32 = 20 (E) · 2/6 of 84 = 28 (R) · 1/6 of 18 = 3 (A) · 2/3 of 48 = 32 (S) · 4/8 of 32 = 16 (D) · 1/3 of 57 = 19 (I) · 1/4 of 120 = 30 (P) · 4/6 of 3 = 2 (H) · 1/8 of 64 = 8 (W) · 2/6 of 111 = 37 (N) · 1/4 of 144 = 36 (F) · 1/3 of 69 = 23 (L) · 2/6 of 66 = 22 (V)
- Clue 3 (Word problems): "FEAR OF BATS"Trail guide found 2 flint tools yesterday and 21 more today. How many flint tools in all? = 23 (F) · Trail guide found 22 bronze idols yesterday and 20 more today. How many bronze idols in all? = 42 (E) · Trail guide found 10 ancient maps yesterday and 51 more today. How many ancient maps in all? = 61 (T) · Trail guide lined up 12 rows of 6 bronze idols. How many bronze idols in all? = 72 (O) · There were 106 bronze idols. 10 were used up. How many bronze idols are left? = 96 (B) · Trail guide found 11 flint tools yesterday and 2 more today. How many flint tools in all? = 13 (R) · Trail guide lined up 11 rows of 3 flint tools. How many flint tools in all? = 33 (A)
- Clue 4 (Multiplication facts (1-12)): "A GREEN BERET WAS LEFT BEHIND IN DIRT"11 × 6 = 66 (A) · 7 × 10 = 70 (B) · 5 × 1 = 5 (G) · 1 × 4 = 4 (T) · 4 × 11 = 44 (D) · 12 × 10 = 120 (R) · 3 × 7 = 21 (E) · 5 × 10 = 50 (L) · 5 × 9 = 45 (I) · 7 × 4 = 28 (W) · 7 × 7 = 49 (F) · 6 × 8 = 48 (H) · 2 × 12 = 24 (S) · 9 × 10 = 90 (N)
- Clue 5 (Fractions of a number): surviving statement (box 3) → Iris Vance1/4 of 4 = 1 · 1/8 of 32 = 4 · 2/6 of 6 = 2 · 1/5 of 50 = 10 · 4/8 of 10 = 5 · 3/10 of 20 = 6 · 2/6 of 33 = 11 · 1/3 of 21 = 7 · 2/5 of 20 = 8 · 5/10 of 24 = 12 · 2/6 of 27 = 9
About this mystery
- Grade level
- Grade 6 math
- Math topics
- Place value, Fractions of a number, Word problems, Multiplication
- Reading level
- grades 5-6
- Theme
- The Mystery of the Sunken Sun Stone — set in The Lost Jungle Ruins of Coban
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects