Grade 2Reading: grades 5-6MultiplicationPlace valueAdditionSubtractionMissing addends
The Case of the Missing Sun Stone
During an expedition to the ancient Serpent Ridge ruins, someone snatched the legendary Sun Stone right from the central altar chamber! The suspect left behind broken traps, strange gear, and dropped equipment across the temple grounds. Help the Trailfinders Guild decode the clues and unmask the culprit before they escape into the jungle.
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 | Special Gear | Exploration Skill | Stance | Bandana Color | Distraction Item |
|---|---|---|---|---|---|
| Capt Amelia Vance | Torch Array | Lock Deciphering | Left-Handed Grip | Cobalt Bandana | Whistle Blast |
| Mateo Cruz | Compass Dial | Wall Climbing | Left-Handed Grip | Cobalt Bandana | Mirror Reflection |
| Nora Chen | Torch Array | Trap Disarming | Left-Handed Grip | Golden Bandana | Mirror Reflection |
| Marcus Flint | Torch Array | Track Reading | Right-Handed Grip | Crimson Bandana | Flashlight Beam |
| Samira Khan | Grappling Hook | Vine Swinging | Right-Handed Grip | Cobalt Bandana | Mirror Reflection |
| Tariq Al-Mansoor | Compass Dial | Lock Deciphering | Right-Handed Grip | Cobalt Bandana | Mirror Reflection |
| Oscar Zhang | Compass Dial | Track Reading | Left-Handed Grip | Cobalt Bandana | Mirror Reflection |
| Jonas Drake | Glider Pack | Track Reading | Left-Handed Grip | Cobalt Bandana | Mirror Reflection |
| Clara Delgado | Grappling Hook | Wall Climbing | Left-Handed Grip | Golden Bandana | Mirror Reflection |
| Oliver Finch | Smoke Pellets | Wall Climbing | Right-Handed Grip | Crimson Bandana | Flashlight Beam |
| Sophia Brooks | Smoke Pellets | Lock Deciphering | Right-Handed Grip | Cobalt Bandana | Mirror Reflection |
| Nadia Patel | Torch Array | Vine Swinging | Left-Handed Grip | Cobalt Bandana | Mirror Reflection |
| Leo Vance | Smoke Pellets | Lock Deciphering | Right-Handed Grip | Crimson Bandana | Flashlight Beam |
| Maya Lin | Torch Array | Trap Disarming | Left-Handed Grip | Crimson Bandana | Whistle Blast |
| Victor Sterling | Compass Dial | Vine Swinging | Left-Handed Grip | Cobalt Bandana | Flashlight Beam |
| Dr Hugo Sterling | Smoke Pellets | Wall Climbing | Left-Handed Grip | Golden Bandana | Mirror Reflection |
| Isabel Gomez | Compass Dial | Lock Deciphering | Left-Handed Grip | Cobalt Bandana | Mirror Reflection |
| Evelyn Cross | Compass Dial | Wall Climbing | Left-Handed Grip | Crimson Bandana | Whistle Blast |
| Felix Thorne | Glider Pack | Trap Disarming | Left-Handed Grip | Golden Bandana | Flashlight Beam |
| Elena Rostova | Smoke Pellets | Trap Disarming | Left-Handed Grip | Crimson Bandana | Mirror Reflection |
| Maya Bishop | Torch Array | Lock Deciphering | Right-Handed Grip | Cobalt Bandana | Flashlight Beam |
Clue 1
Multiplication facts (1-12)
Inside the temple entryway, tile patterns on the stone floor are organized in equal rows. Solving this array code reveals the 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
88
10
9
35
21
24
20
9
9
8
33
81
21
35
9
35
36
21
9
16
1
21
T
88
20
16
9
110
27
1
9
16
54
27
1
24
27
1
24
8 × 11 =T
3 × 11 =P
3 × 7 =O
9 × 9 =L
11 × 10 =V
2 × 8 =S
3 × 3 =E
5 × 2 =H
8 × 1 =X
2 × 10 =U
1 × 1 =N
7 × 5 =R
9 × 3 =I
6 × 9 =W
12 × 3 =D
3 × 8 =G
0/16 letters found
Clue 2
Place value
A carved stone pedestal displays glowing glyphs with distinct tens and ones places. Deciphering the exact value unlocks the next 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
14
16
66
37
41
37
27
66
89
T
14
16
66
76
82
T
14
16
66
39
54
27
85
99
T
14
16
54
76
66
96
T
14
16
54
40
82
66
82
68
79
99
27
What number has 1 ten and 4 ones?T
What number has 6 tens and 6 ones?E
What number has 9 tens and 9 ones?I
What number has 3 tens and 9 ones?M
What number has 9 tens and 6 ones?F
What number has 7 tens and 9 ones?R
What number has 8 tens and 2 ones?D
What number has 4 tens and 1 one?U
What number has 2 tens and 7 ones?P
What number has 8 tens and 9 ones?C
What number has 1 ten and 6 ones?H
What number has 3 tens and 7 ones?S
What number has 5 tens and 4 ones?A
What number has 8 tens and 5 ones?W
What number has 4 tens and 0 ones?N
What number has 6 tens and 8 ones?G
What number has 7 tens and 6 ones?L
0/17 letters found
Clue 3
Addition
The expedition logbook lists supplies gathered from two different campsites. Adding these totals together clears up the suspect 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.
A
33
24
35
47
84
45
61
47
34
34
97
34
34
40
70
26
40
56
55
47
97
84
27
26
47
84
41
40
41
55
35
40
81
47
26
26
A
33
47
84
9 + 24 =A
61 + 36 =O
42 + 42 =N
30 + 17 =I
28 + 12 =E
13 + 21 =R
12 + 23 =H
17 + 7 =S
37 + 44 =V
26 + 44 =F
21 + 40 =M
17 + 38 =T
23 + 22 =Y
18 + 8 =L
18 + 38 =C
13 + 28 =D
10 + 17 =B
0/17 letters found
Clue 4
Subtraction
Comparing the total number of brass lanterns brought into the cavern against what remains shows the difference needed for the fourth 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
28
18
12
15
12
T
28
12
63
T
28
71
52
12
16
71
63
66
12
15
69
16
63
26
49
70
85
T
28
49
70
61
15
70
61
70
64
71
49
12
29
84
36 - 8 =T
117 - 33 =S
70 - 1 =U
31 - 19 =E
108 - 38 =A
69 - 20 =B
111 - 40 =I
86 - 25 =N
57 - 28 =R
104 - 40 =F
63 - 11 =V
27 - 9 =H
26 - 11 =D
64 - 1 =C
97 - 31 =K
50 - 24 =O
50 - 34 =P
123 - 38 =L
0/18 letters found
Clue 5
Missing addends — the last clue
A heavy balance scale requires a specific target weight of golden relics to balance out. Calculating the missing amount reveals the final clue.
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 + ___ = 8
2 + ___ = 10
7 + ___ = 13
10 + ___ = 14
4 + ___ = 16
7 + ___ = 14
6 + ___ = 16
2 + ___ = 11
8 + ___ = 11
1 + ___ = 3
4 + ___ = 15
Step 2 — cross out the sentence with each answer
1.The villain navigated corridors with a compass dial, then deciphered the ancient lock dials.
2.The villain blinded guards using smoke pellets, then followed footprints along the muddy track.
3.The villain lit the secret passage using a torch array, then disarmed the dart traps.
4.The villain zapped the lock with a grappling hook, then disarmed the dart traps.
5.The villain navigated corridors with a compass dial, then scrambled up the stone wall.
6.The villain soared off the balcony using a glider pack, then followed footprints along the muddy track.
7.The villain soared off the balcony using a glider pack, then disarmed the dart traps.
8.The villain navigated corridors with a compass dial, then followed footprints along the muddy track.
9.The villain lit the secret passage using a torch array, then swung across the canyon vines.
10.The villain zapped the lock with a grappling hook, then swung across the canyon vines.
11.The villain zapped the lock with a grappling hook, then followed footprints along the muddy track.
12.The villain blinded guards using smoke pellets, then swung across the canyon vines.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Case of the Missing Sun Stone
Culprit: Mateo Cruz (Compass Dial · Wall Climbing · Left-Handed Grip · Cobalt Bandana · Mirror Reflection)
- Clue 1 (Multiplication facts (1-12)): "THE ROGUE EXPLORER DOES NOT USE VINE SWINGING"8 × 11 = 88 (T) · 3 × 11 = 33 (P) · 3 × 7 = 21 (O) · 9 × 9 = 81 (L) · 11 × 10 = 110 (V) · 2 × 8 = 16 (S) · 3 × 3 = 9 (E) · 5 × 2 = 10 (H) · 8 × 1 = 8 (X) · 2 × 10 = 20 (U) · 1 × 1 = 1 (N) · 7 × 5 = 35 (R) · 9 × 3 = 27 (I) · 6 × 9 = 54 (W) · 12 × 3 = 36 (D) · 3 × 8 = 24 (G)
- Clue 2 (Place value): "THE SUSPECT HELD THE MAP WITH A LEFT HANDED GRIP"What number has 1 ten and 4 ones? = 14 (T) · What number has 6 tens and 6 ones? = 66 (E) · What number has 9 tens and 9 ones? = 99 (I) · What number has 3 tens and 9 ones? = 39 (M) · What number has 9 tens and 6 ones? = 96 (F) · What number has 7 tens and 9 ones? = 79 (R) · What number has 8 tens and 2 ones? = 82 (D) · What number has 4 tens and 1 one? = 41 (U) · What number has 2 tens and 7 ones? = 27 (P) · What number has 8 tens and 9 ones? = 89 (C) · What number has 1 ten and 6 ones? = 16 (H) · What number has 3 tens and 7 ones? = 37 (S) · What number has 5 tens and 4 ones? = 54 (A) · What number has 8 tens and 5 ones? = 85 (W) · What number has 4 tens and 0 ones? = 40 (N) · What number has 6 tens and 8 ones? = 68 (G) · What number has 7 tens and 6 ones? = 76 (L)
- Clue 3 (Addition): "A SHINY MIRROR REFLECTION BLINDED THE VILLAIN"9 + 24 = 33 (A) · 61 + 36 = 97 (O) · 42 + 42 = 84 (N) · 30 + 17 = 47 (I) · 28 + 12 = 40 (E) · 13 + 21 = 34 (R) · 12 + 23 = 35 (H) · 17 + 7 = 24 (S) · 37 + 44 = 81 (V) · 26 + 44 = 70 (F) · 21 + 40 = 61 (M) · 17 + 38 = 55 (T) · 23 + 22 = 45 (Y) · 18 + 8 = 26 (L) · 18 + 38 = 56 (C) · 13 + 28 = 41 (D) · 10 + 17 = 27 (B)
- Clue 4 (Subtraction): "THE DETECTIVE PICKED UP COBALT BANDANA FIBERS"36 - 8 = 28 (T) · 117 - 33 = 84 (S) · 70 - 1 = 69 (U) · 31 - 19 = 12 (E) · 108 - 38 = 70 (A) · 69 - 20 = 49 (B) · 111 - 40 = 71 (I) · 86 - 25 = 61 (N) · 57 - 28 = 29 (R) · 104 - 40 = 64 (F) · 63 - 11 = 52 (V) · 27 - 9 = 18 (H) · 26 - 11 = 15 (D) · 64 - 1 = 63 (C) · 97 - 31 = 66 (K) · 50 - 24 = 26 (O) · 50 - 34 = 16 (P) · 123 - 38 = 85 (L)
- Clue 5 (Missing addends): surviving statement (box 5) → Mateo Cruz7 + ___ = 8 = 1 · 2 + ___ = 10 = 8 · 7 + ___ = 13 = 6 · 10 + ___ = 14 = 4 · 4 + ___ = 16 = 12 · 7 + ___ = 14 = 7 · 6 + ___ = 16 = 10 · 2 + ___ = 11 = 9 · 8 + ___ = 11 = 3 · 1 + ___ = 3 = 2 · 4 + ___ = 15 = 11
About this mystery
- Grade level
- Grade 2 math
- Math topics
- Multiplication, Place value, Addition, Subtraction, Missing addends
- Reading level
- grades 5-6
- Theme
- The Case of the Missing Sun Stone — set in Serpent Ridge Temple Ruins
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects