Grade 6Reading: grades 5-6MultiplicationAdditionPlace valueWord problemsDivision
The Lost Compass of Sunken Peak
An ancient golden compass vanished from the Sunken Peak Temple during an expedition. The lead archaeologist called upon top junior detectives to solve the mystery before the thief escapes the island.
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 | Primary Gear | Special Tool | Dominant Hand | Hair Style | Defense Used |
|---|---|---|---|---|---|
| Eli Santos | Glider Wings | Grappling Hook | Right Handed | Braided Silver | Bright Flashlight |
| Owen Mercer | Scuba Suit | Glow Compass | Left Handed | Braided Silver | Bright Flashlight |
| Kai Tanaka | Magnetic Boots | Glider Canvas | Left Handed | Curly Jet Black | Bright Flashlight |
| Ruby Patel | Scuba Suit | Smoke Bomb | Left Handed | Braided Silver | Loud Whistle |
| Sofia Rossi | Grappling Gun | Glider Canvas | Right Handed | Braided Silver | Bright Flashlight |
| Grace O Sullivan | Magnetic Boots | Grappling Hook | Right Handed | Curly Jet Black | Bright Flashlight |
| Liam Thorne | Glider Wings | Glider Canvas | Right Handed | Spiky Copper | Mirror Shield |
| Ella Gupta | Magnetic Boots | Glider Canvas | Left Handed | Braided Silver | Loud Whistle |
| Chloe Dubois | Climbing Harness | Smoke Bomb | Left Handed | Braided Silver | Bright Flashlight |
| Leo Vance | Magnetic Boots | Signal Flare | Left Handed | Spiky Copper | Bright Flashlight |
| Zoe Park | Magnetic Boots | Glider Canvas | Left Handed | Braided Silver | Mirror Shield |
| Nora Chen | Scuba Suit | Glider Canvas | Left Handed | Braided Silver | Bright Flashlight |
| Caleb Vance | Magnetic Boots | Smoke Bomb | Right Handed | Braided Silver | Bright Flashlight |
| Noah Zhao | Glider Wings | Signal Flare | Left Handed | Spiky Copper | Bright Flashlight |
| Hugo Reyes | Grappling Gun | Signal Flare | Right Handed | Braided Silver | Bright Flashlight |
| Finn O Connor | Magnetic Boots | Glow Compass | Left Handed | Braided Silver | Bright Flashlight |
| Toby Walsh | Glider Wings | Signal Flare | Left Handed | Braided Silver | Bright Flashlight |
| Aria Novak | Scuba Suit | Grappling Hook | Right Handed | Curly Jet Black | Loud Whistle |
| Mia Kowalski | Grappling Gun | Grappling Hook | Left Handed | Spiky Copper | Bright Flashlight |
| Emma Lindqvist | Magnetic Boots | Grappling Hook | Right Handed | Curly Jet Black | Mirror Shield |
| Ava Brooks | Climbing Harness | Smoke Bomb | Left Handed | Spiky Copper | Loud Whistle |
Clue 1
Multiplication facts (1-12)
The temple floor is tiled in equal grid sections. Multiplying the rows gives us the first decoded secret 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
8
24
2
6
3
6
108
2
32
T
8
63
81
2
6
36
81
T
8
32
10
12
12
55
10
6
35
81
30
2
100
81
35
100
4 × 2 =T
2 × 1 =E
3 × 1 =U
8 × 4 =C
9 × 9 =O
11 × 5 =Y
10 × 10 =B
1 × 10 =A
12 × 3 =N
1 × 6 =S
9 × 12 =P
4 × 3 =R
8 × 3 =H
7 × 5 =M
9 × 7 =D
3 × 10 =K
0/16 letters found
Clue 2
Addition
To track where the thief went, we need to sum up all the muddy footprints found across the three corridors.
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
6736
2984
6874
6014
2375
3656
3656
4017
2375
7015
2651
5706
2375
T
6736
6874
3571
2651
2375
T
6736
2984
T
6736
2984
6874
2375
5706
3656
6874
5163
T
6736
2984
4017
7015
3500
3600 + 3136 =T
2698 + 3316 =V
1440 + 935 =I
2663 + 2500 =F
4280 + 2594 =E
1456 + 2200 =L
2277 + 4738 =N
3613 + 2093 =R
1061 + 1923 =H
1546 + 1105 =W
1451 + 2120 =S
2810 + 1207 =A
1662 + 1838 =D
0/13 letters found
Clue 3
Place value
A locked stone gate displays a number panel. Finding the place value of the key digit unlocks the next piece of evidence.
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
30
5000
300
90
90
40
300
700
60
40
7000
4000
90
300
700
1000
30
1000
4000
80
40
4000
8000
300
6000
9000
T
2000
100
90
40
7000
9000
90
300
6000
9000
T
2000
What is the value of the 2 in 302,805?T
What is the value of the 4 in 574,017?B
What is the value of the 1 in 71,090?D
What is the value of the 7 in 894,745?N
What is the value of the 3 in 879,359?I
What is the value of the 6 in 986,088?G
What is the value of the 9 in 846,796?L
What is the value of the 3 in 59,036?E
What is the value of the 7 in 817,485?S
What is the value of the 8 in 32,786?Y
What is the value of the 9 in 869,142?H
What is the value of the 5 in 105,334?V
What is the value of the 8 in 98,179?R
What is the value of the 6 in 381,065?W
What is the value of the 1 in 37,155?F
What is the value of the 4 in 91,742?A
0/16 letters found
Clue 4
Word problems
We found a scrambled notebook containing gear supply logs. Solving these word problems reveals another clue.
Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.
Astrandof hairturnedupatthescene.
B
104
120
100
108
38
47
38
85
108
L
V
47
120
Detective Parker found 72 map scroll yesterday and 32 more today. How many map scroll in all?B
Detective Parker lined up 12 rows of 9 ruby artifact. How many ruby artifact in all?I
There were 70 map scroll. 23 were used up. How many map scroll are left?E
There were 112 ruby artifact. 27 were used up. How many ruby artifact are left?S
There were 154 map scroll. 34 were used up. How many map scroll are left?R
Detective Parker found 17 canteen yesterday and 21 more today. How many canteen in all?D
There were 112 ruby artifact. 12 were used up. How many ruby artifact are left?A
0/7 letters found
Clue 5
Division facts (1-12) — the last clue
The thief dropped a bag of ancient coins. Dividing them into equal piles helps us decode the final message.
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
8 ÷ 2 = ?
18 ÷ 3 = ?
63 ÷ 9 = ?
24 ÷ 3 = ?
63 ÷ 7 = ?
55 ÷ 5 = ?
4 ÷ 2 = ?
7 ÷ 7 = ?
80 ÷ 8 = ?
24 ÷ 8 = ?
132 ÷ 11 = ?
Step 2 — cross out the sentence with each answer
1.The villain swung across the chasm, then soared past the watchtower.
2.The villain walked up the iron door, then soared past the watchtower.
3.The villain walked up the iron door, then marked the exit trail.
4.The villain walked up the iron door, then lit up the dark tunnel.
5.The villain swam through the flooded tunnel, then lit up the dark tunnel.
6.The villain glided over the pit, then marked the exit trail.
7.The villain swam through the flooded tunnel, then soared past the watchtower.
8.The villain glided over the pit, then zipped up to the canopy.
9.The villain swung across the chasm, then zipped up to the canopy.
10.The villain glided over the pit, then lit up the dark tunnel.
11.The villain swung across the chasm, then lit up the dark tunnel.
12.The villain swam through the flooded tunnel, then marked the exit trail.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Lost Compass of Sunken Peak
Culprit: Owen Mercer (Scuba Suit · Glow Compass · Left Handed · Braided Silver · Bright Flashlight)
- Clue 1 (Multiplication facts (1-12)): "THE SUSPECT DOES NOT CARRY A SMOKE BOMB"4 × 2 = 8 (T) · 2 × 1 = 2 (E) · 3 × 1 = 3 (U) · 8 × 4 = 32 (C) · 9 × 9 = 81 (O) · 11 × 5 = 55 (Y) · 10 × 10 = 100 (B) · 1 × 10 = 10 (A) · 12 × 3 = 36 (N) · 1 × 6 = 6 (S) · 9 × 12 = 108 (P) · 4 × 3 = 12 (R) · 8 × 3 = 24 (H) · 7 × 5 = 35 (M) · 9 × 7 = 63 (D) · 3 × 10 = 30 (K)
- Clue 2 (Addition): "THE VILLAIN WRITES WITH THEIR LEFT HAND"3600 + 3136 = 6736 (T) · 2698 + 3316 = 6014 (V) · 1440 + 935 = 2375 (I) · 2663 + 2500 = 5163 (F) · 4280 + 2594 = 6874 (E) · 1456 + 2200 = 3656 (L) · 2277 + 4738 = 7015 (N) · 3613 + 2093 = 5706 (R) · 1061 + 1923 = 2984 (H) · 1546 + 1105 = 2651 (W) · 1451 + 2120 = 3571 (S) · 2810 + 1207 = 4017 (A) · 1662 + 1838 = 3500 (D)
- Clue 3 (Place value): "THE VILLAIN WAS BLINDED BY A BRIGHT FLASHLIGHT"What is the value of the 2 in 302,805? = 2000 (T) · What is the value of the 4 in 574,017? = 4000 (B) · What is the value of the 1 in 71,090? = 1000 (D) · What is the value of the 7 in 894,745? = 700 (N) · What is the value of the 3 in 879,359? = 300 (I) · What is the value of the 6 in 986,088? = 6000 (G) · What is the value of the 9 in 846,796? = 90 (L) · What is the value of the 3 in 59,036? = 30 (E) · What is the value of the 7 in 817,485? = 7000 (S) · What is the value of the 8 in 32,786? = 80 (Y) · What is the value of the 9 in 869,142? = 9000 (H) · What is the value of the 5 in 105,334? = 5000 (V) · What is the value of the 8 in 98,179? = 8000 (R) · What is the value of the 6 in 381,065? = 60 (W) · What is the value of the 1 in 37,155? = 100 (F) · What is the value of the 4 in 91,742? = 40 (A)
- Clue 4 (Word problems): "BRAIDED SILVER"Detective Parker found 72 map scroll yesterday and 32 more today. How many map scroll in all? = 104 (B) · Detective Parker lined up 12 rows of 9 ruby artifact. How many ruby artifact in all? = 108 (I) · There were 70 map scroll. 23 were used up. How many map scroll are left? = 47 (E) · There were 112 ruby artifact. 27 were used up. How many ruby artifact are left? = 85 (S) · There were 154 map scroll. 34 were used up. How many map scroll are left? = 120 (R) · Detective Parker found 17 canteen yesterday and 21 more today. How many canteen in all? = 38 (D) · There were 112 ruby artifact. 12 were used up. How many ruby artifact are left? = 100 (A)
- Clue 5 (Division facts (1-12)): surviving statement (box 5) → Owen Mercer8 ÷ 2 = 4 · 18 ÷ 3 = 6 · 63 ÷ 9 = 7 · 24 ÷ 3 = 8 · 63 ÷ 7 = 9 · 55 ÷ 5 = 11 · 4 ÷ 2 = 2 · 7 ÷ 7 = 1 · 80 ÷ 8 = 10 · 24 ÷ 8 = 3 · 132 ÷ 11 = 12
About this mystery
- Grade level
- Grade 6 math
- Math topics
- Multiplication, Addition, Place value, Word problems, Division
- Reading level
- grades 5-6
- Theme
- The Lost Compass of Sunken Peak — set in Sunken Peak Temple
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects