Grade 6Reading: grades 5-6PercentagesExponentsOrder of operationsMultiplicationDivision
The Mystery of the Lost Crystal Idol
Someone broke into the temple vault and snatched the Ancient Crystal Idol. Solve the clues around the dig site to catch the culprit before they escape 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 | Tool | Gear | Habit | Hair Style | Fear |
|---|---|---|---|---|---|
| Marco Polo | Pocket Compass | Steel Canteen | Right Handed | Spiky Hair | Bright Flashes |
| Lara Croft | Pocket Compass | Waterproof Map | Left Handed | Braided Hair | Bee Swarms |
| Ernest Shackleton | Decoder Ring | Leather Satchel | Left Handed | Braided Hair | Loud Drums |
| Elena Fisher | Smoke Bomb | Steel Canteen | Left Handed | Braided Hair | Bee Swarms |
| Charles Darwin | Flashlight | Jungle Boots | Left Handed | Braided Hair | Bright Flashes |
| Nathan Drake | Pocket Compass | Steel Canteen | Left Handed | Braided Hair | Bee Swarms |
| David Livingstone | Flashlight | Climbing Harness | Left Handed | Curly Hair | Bee Swarms |
| Jacques Cousteau | Decoder Ring | Climbing Harness | Left Handed | Braided Hair | Bee Swarms |
| Amelia Earhart | Decoder Ring | Leather Satchel | Left Handed | Spiky Hair | Bee Swarms |
| Sully Victor | Pocket Compass | Jungle Boots | Left Handed | Curly Hair | Bright Flashes |
| Evelyn Carnahan | Grappling Hook | Waterproof Map | Right Handed | Curly Hair | Loud Drums |
| Percy Fawcett | Grappling Hook | Steel Canteen | Left Handed | Braided Hair | Bright Flashes |
| Edmund Hillary | Grappling Hook | Jungle Boots | Left Handed | Braided Hair | Bright Flashes |
| Freya Stark | Decoder Ring | Leather Satchel | Left Handed | Braided Hair | Bee Swarms |
| MacGyver | Flashlight | Leather Satchel | Left Handed | Curly Hair | Loud Drums |
| Gertrude Bell | Flashlight | Jungle Boots | Right Handed | Spiky Hair | Bright Flashes |
| Matthew Henson | Flashlight | Steel Canteen | Left Handed | Spiky Hair | Bright Flashes |
| Indiana Jones | Flashlight | Leather Satchel | Left Handed | Spiky Hair | Loud Drums |
| Jack Sparrow | Decoder Ring | Climbing Harness | Left Handed | Spiky Hair | Bright Flashes |
| Nellie Bly | Pocket Compass | Climbing Harness | Right Handed | Braided Hair | Bee Swarms |
| Thor Heyerdahl | Pocket Compass | Jungle Boots | Left Handed | Braided Hair | Bright Flashes |
Clue 1
Percentages
The camp ledger lists the percentage of jungle supplies remaining after the break in.
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
7
42
25
38
45
38
34
25
16
T
7
10
40
25
38
3
40
T
7
16
11
20
20
32
11
36
25
11
T
7
42
25
20
38
11
T
7
16
42
25
36
50% of 14 =T
20% of 15 =N
5% of 500 =E
5% of 400 =R
40% of 90 =L
40% of 40 =C
25% of 136 =P
20% of 200 =O
40% of 105 =H
10% of 100 =D
10% of 320 =Y
75% of 60 =U
50% of 76 =S
20% of 55 =A
0/14 letters found
Clue 2
Exponents
A digital keypad on the temple gate calculates access codes using powers and exponents.
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
9
8
81
243
121
144
64
196
400
T
9
144
81
324
T
9
16
T
9
196
25
361
125
81
144
81
324
T
9
8
25
361
32
64
196
400
361
T
9
16
3^2 =T
2^3 =H
11^2 =U
20^2 =I
4^2 =S
14^2 =R
8^2 =P
5^3 =G
3^4 =E
12^2 =L
5^2 =A
3^5 =C
18^2 =F
19^2 =N
2^5 =D
0/15 letters found
Clue 3
Order of operations
To unlock the temple ruin map, you must solve a multi step equation in the correct order.
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
9
43
49
T
9
43
65
49
6
6
56
49
44
60
6
T
9
49
66
60
T
9
T
9
66
60
16
T
9
65
31
28
23
49
49
40
69
60
66
36
40
5 + 2 × 2 =T
9 × 6 - 5 =E
9 × 7 - 3 =A
11 × 7 - 8 =W
32 + 2 × 2 =M
2 + 2 × 2 =F
7 + 2 × 8 =B
32 + 3 × 4 =D
20 + 4 × 9 =L
10 × 6 - 29 =N
12 × 7 - 18 =R
4 + 8 × 3 =G
7 × 11 - 12 =I
1 + 6 × 7 =H
6 × 6 - 20 =C
4 + 4 × 9 =S
0/16 letters found
Clue 4
Multiplication facts (1-12)
The archeologist counted the total carved stone tiles arranged in equal rows.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
E
40
99
25
90
E
40
55
132
E
40
1
72
110
42
1
63
24
110
55
81
1
60
7
63
55
90
110
3
35
7
63
25
90
E
40
90
72
63
25
7
10 × 4 =E
9 × 7 =A
12 × 11 =C
5 × 7 =B
5 × 5 =I
7 × 6 =W
1 × 7 =R
11 × 10 =O
10 × 6 =T
5 × 11 =N
9 × 9 =G
6 × 12 =H
6 × 4 =L
11 × 9 =V
3 × 1 =F
10 × 9 =D
1 × 1 =S
0/17 letters found
Clue 5
Division facts (1-12) — the last clue
The expedition team needs to divide the remaining rations equally among all tents.
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
3 ÷ 1 = ?
6 ÷ 1 = ?
55 ÷ 11 = ?
12 ÷ 1 = ?
20 ÷ 2 = ?
24 ÷ 6 = ?
11 ÷ 11 = ?
27 ÷ 3 = ?
55 ÷ 5 = ?
24 ÷ 12 = ?
48 ÷ 6 = ?
Step 2 — cross out the sentence with each answer
1.The villain unlocked the stone door with a decoder ring, then took a quick drink from a steel canteen.
2.The villain lit up the hidden passage using a flashlight, then stashed the idol inside a leather satchel.
3.The villain unlocked the stone door with a decoder ring, then scaled the ancient wall with a climbing harness.
4.The villain unlocked the stone door with a decoder ring, then stashed the idol inside a leather satchel.
5.The villain vanished in a cloud using a smoke bomb, then took a quick drink from a steel canteen.
6.The villain navigated the dark tunnels with a pocket compass, then checked the route on a waterproof map.
7.The villain navigated the dark tunnels with a pocket compass, then took a quick drink from a steel canteen.
8.The villain navigated the dark tunnels with a pocket compass, then stashed the idol inside a leather satchel.
9.The villain unlocked the stone door with a decoder ring, then escaped quietly in sturdy jungle boots.
10.The villain swung across the pit with a grappling hook, then checked the route on a waterproof map.
11.The villain lit up the hidden passage using a flashlight, then scaled the ancient wall with a climbing harness.
12.The villain swung across the pit with a grappling hook, then stashed the idol inside a leather satchel.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Mystery of the Lost Crystal Idol
Culprit: Nathan Drake (Pocket Compass · Steel Canteen · Left Handed · Braided Hair · Bee Swarms)
- Clue 1 (Percentages): "THE SUSPECT DOES NOT CARRY A LEATHER SATCHEL"50% of 14 = 7 (T) · 20% of 15 = 3 (N) · 5% of 500 = 25 (E) · 5% of 400 = 20 (R) · 40% of 90 = 36 (L) · 40% of 40 = 16 (C) · 25% of 136 = 34 (P) · 20% of 200 = 40 (O) · 40% of 105 = 42 (H) · 10% of 100 = 10 (D) · 10% of 320 = 32 (Y) · 75% of 60 = 45 (U) · 50% of 76 = 38 (S) · 20% of 55 = 11 (A)
- Clue 2 (Exponents): "THE CULPRIT LEFT STRANGE LEFT HAND PRINTS"3^2 = 9 (T) · 2^3 = 8 (H) · 11^2 = 121 (U) · 20^2 = 400 (I) · 4^2 = 16 (S) · 14^2 = 196 (R) · 8^2 = 64 (P) · 5^3 = 125 (G) · 3^4 = 81 (E) · 12^2 = 144 (L) · 5^2 = 25 (A) · 3^5 = 243 (C) · 18^2 = 324 (F) · 19^2 = 361 (N) · 2^5 = 32 (D)
- Clue 3 (Order of operations): "THE THIEF FLED AFTER ATTRACTING BEE SWARMS"5 + 2 × 2 = 9 (T) · 9 × 6 - 5 = 49 (E) · 9 × 7 - 3 = 60 (A) · 11 × 7 - 8 = 69 (W) · 32 + 2 × 2 = 36 (M) · 2 + 2 × 2 = 6 (F) · 7 + 2 × 8 = 23 (B) · 32 + 3 × 4 = 44 (D) · 20 + 4 × 9 = 56 (L) · 10 × 6 - 29 = 31 (N) · 12 × 7 - 18 = 66 (R) · 4 + 8 × 3 = 28 (G) · 7 × 11 - 12 = 65 (I) · 1 + 6 × 7 = 43 (H) · 6 × 6 - 20 = 16 (C) · 4 + 4 × 9 = 40 (S)
- Clue 4 (Multiplication facts (1-12)): "EVIDENCE SHOWS A LONG STRAND OF BRAIDED HAIR"10 × 4 = 40 (E) · 9 × 7 = 63 (A) · 12 × 11 = 132 (C) · 5 × 7 = 35 (B) · 5 × 5 = 25 (I) · 7 × 6 = 42 (W) · 1 × 7 = 7 (R) · 11 × 10 = 110 (O) · 10 × 6 = 60 (T) · 5 × 11 = 55 (N) · 9 × 9 = 81 (G) · 6 × 12 = 72 (H) · 6 × 4 = 24 (L) · 11 × 9 = 99 (V) · 3 × 1 = 3 (F) · 10 × 9 = 90 (D) · 1 × 1 = 1 (S)
- Clue 5 (Division facts (1-12)): surviving statement (box 7) → Nathan Drake3 ÷ 1 = 3 · 6 ÷ 1 = 6 · 55 ÷ 11 = 5 · 12 ÷ 1 = 12 · 20 ÷ 2 = 10 · 24 ÷ 6 = 4 · 11 ÷ 11 = 1 · 27 ÷ 3 = 9 · 55 ÷ 5 = 11 · 24 ÷ 12 = 2 · 48 ÷ 6 = 8
About this mystery
- Grade level
- Grade 6 math
- Math topics
- Percentages, Exponents, Order of operations, Multiplication, Division
- Reading level
- grades 5-6
- Theme
- The Mystery of the Lost Crystal Idol — set in Sapphire Coast Jungle Ruins
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects