Grade 2Reading: grades 3-4Place valueAdditionSubtractionSkip countingMissing addends
The Mystery of the Golden Compass
Someone snuck into the base camp at the Sunken Temple of Oakhaven and swiped the ancient Golden Compass! The clues left behind will help us figure out which rogue explorer did it.
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 | Adventure Tool | Disguise Gear | Watch Wrist | Cap Color | Distraction Item |
|---|---|---|---|---|---|
| Zane Archer | Pocket Spyglass | Oilskin Coat | Right Wrist Watch | Brown Cap | Trail Snack |
| Uriah Vance | Pocket Spyglass | Canvas Vest | Right Wrist Watch | Red Cap | Shiny Coin |
| Violet Hall | Grappling Hook | Oilskin Coat | Left Wrist Watch | Brown Cap | Trail Snack |
| Pip Harrison | Pocket Spyglass | Canvas Vest | Left Wrist Watch | Red Cap | Trail Snack |
| Ivy Stone | Brass Lantern | Canvas Vest | Left Wrist Watch | Red Cap | Squeaky Toy |
| Cora Finch | Rope Ladder | Safari Jacket | Left Wrist Watch | Brown Cap | Shiny Coin |
| Jasper Vale | Rope Ladder | Oilskin Coat | Right Wrist Watch | Brown Cap | Squeaky Toy |
| Quinn Baxter | Brass Lantern | Safari Jacket | Left Wrist Watch | Brown Cap | Squeaky Toy |
| Baron Flint | Brass Lantern | Oilskin Coat | Right Wrist Watch | Red Cap | Trail Snack |
| Opal Ridge | Brass Lantern | Leather Poncho | Right Wrist Watch | Green Cap | Trail Snack |
| Leo Thorne | Pocket Spyglass | Leather Poncho | Right Wrist Watch | Brown Cap | Squeaky Toy |
| Maya Woods | Grappling Hook | Leather Poncho | Right Wrist Watch | Brown Cap | Squeaky Toy |
| Gwen Sterling | Rope Ladder | Oilskin Coat | Right Wrist Watch | Green Cap | Trail Snack |
| Ruby Marsh | Brass Lantern | Safari Jacket | Right Wrist Watch | Red Cap | Squeaky Toy |
| Kira Frost | Machete Tool | Canvas Vest | Left Wrist Watch | Red Cap | Squeaky Toy |
| Amelia Vance | Grappling Hook | Camo Cloak | Right Wrist Watch | Brown Cap | Squeaky Toy |
| Felix Drake | Grappling Hook | Camo Cloak | Left Wrist Watch | Brown Cap | Trail Snack |
| Nico Reed | Brass Lantern | Oilskin Coat | Right Wrist Watch | Red Cap | Squeaky Toy |
| Elena Cruz | Pocket Spyglass | Oilskin Coat | Right Wrist Watch | Red Cap | Squeaky Toy |
| Wyatt Cole | Grappling Hook | Safari Jacket | Right Wrist Watch | Brown Cap | Squeaky Toy |
| Sammy Brooks | Grappling Hook | Oilskin Coat | Left Wrist Watch | Red Cap | Trail Snack |
Clue 1
Place value
The archaeologist checked the dial on the temple vault door reading the digit positions to crack the first lock code.
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
58
37
59
43
41
43
29
59
75
T
58
16
94
59
43
91
94
T
58
18
59
53
28
53
75
53
15
94
75
54
94
53
17
What number has 5 tens and 8 ones?T
What number has 1 ten and 6 ones?D
What number has 9 tens and 4 ones?O
What number has 2 tens and 8 ones?R
What number has 5 tens and 3 ones?A
What number has 5 tens and 9 ones?E
What number has 4 tens and 3 ones?S
What number has 3 tens and 7 ones?H
What number has 1 ten and 8 ones?W
What number has 9 tens and 1 one?N
What number has 4 tens and 1 one?U
What number has 1 ten and 7 ones?K
What number has 7 tens and 5 ones?C
What number has 2 tens and 9 ones?P
What number has 5 tens and 4 ones?L
What number has 1 ten and 5 ones?M
0/16 letters found
Clue 2
Addition
The team tallied up the total number of footprints left in the mud outside the camp to figure out how many steps the thief took.
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
34
24
93
75
29
62
89
76
T
34
63
93
29
26
58
29
63
29
T
34
46
24
69
62
T
34
24
93
26
76
31
24
T
34
63
26
76
58
T
34
17 + 17 =T
38 + 20 =S
52 + 37 =D
31 + 44 =B
21 + 10 =G
15 + 11 =R
24 + 39 =W
15 + 31 =C
16 + 13 =A
63 + 30 =E
10 + 14 =H
30 + 32 =N
49 + 27 =I
24 + 45 =O
0/14 letters found
Clue 3
Subtraction
Comparing the leftover gear crates to the original count reveals how many supplies were carried away.
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
24
11
85
41
30
85
72
47
52
72
41
75
42
41
T
24
74
72
44
T
24
85
75
54
19
72
41
17
18
85
72
47
19
T
24
57
19
29 - 5 =T
78 - 3 =D
53 - 35 =U
91 - 34 =O
83 - 31 =W
68 - 14 =B
82 - 35 =K
81 - 9 =A
29 - 12 =Q
96 - 11 =E
55 - 11 =C
24 - 13 =H
72 - 31 =S
56 - 37 =Y
49 - 7 =I
101 - 27 =R
66 - 36 =N
0/17 letters found
Clue 4
Skip counting
The detective followed stepping stones across the river counting by equal jumps to reach the hidden cave entrance.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
F
130
33
70
26
20
20
22
14
90
30
14
33
55
26
12
9
14
15
22
20
27
F
130
14
33
120
22
30
14
33
55
26
24
22
36
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, ___, 140, 150F
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, ___, 33, 36B
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, ___, 75, 80U
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, ___, 18, 21E
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110K
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, ___, 27, 30C
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, ___, 28, 30N
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65W
Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15H
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, ___, 14, 16T
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, ___, 130, 140M
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33S
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, ___, 16, 18R
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, ___, 24, 26A
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, ___, 39, 42P
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, ___, 22, 24D
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39O
0/17 letters found
Clue 5
Missing addends — the last clue
To open the secret stone wall the team must find the missing weight needed to balance the ancient pressure scale.
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
4 + ___ = 15
1 + ___ = 2
5 + ___ = 11
10 + ___ = 13
5 + ___ = 10
3 + ___ = 12
3 + ___ = 11
3 + ___ = 10
2 + ___ = 4
1 + ___ = 5
2 + ___ = 14
Step 2 — cross out the sentence with each answer
1.The villain used a grappling hook, then zipped up a leather poncho.
2.The villain peered through a pocket spyglass, then wrapped up in a camo cloak.
3.The villain cleared vines with a machete tool, then wrapped up in a camo cloak.
4.The villain peered through a pocket spyglass, then buttoned a canvas vest.
5.The villain peered through a pocket spyglass, then adjusted a safari jacket.
6.The villain peered through a pocket spyglass, then zipped up a leather poncho.
7.The villain lit a brass lantern, then buttoned a canvas vest.
8.The villain peered through a pocket spyglass, then buttoned an oilskin coat.
9.The villain lit a brass lantern, then wrapped up in a camo cloak.
10.The villain used a grappling hook, then adjusted a safari jacket.
11.The villain unrolled a rope ladder, then buttoned an oilskin coat.
12.The villain lit a brass lantern, then zipped up a leather poncho.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Mystery of the Golden Compass
Culprit: Wyatt Cole (Grappling Hook · Safari Jacket · Right Wrist Watch · Brown Cap · Squeaky Toy)
- Clue 1 (Place value): "THE SUSPECT DOES NOT WEAR A CAMO CLOAK"What number has 5 tens and 8 ones? = 58 (T) · What number has 1 ten and 6 ones? = 16 (D) · What number has 9 tens and 4 ones? = 94 (O) · What number has 2 tens and 8 ones? = 28 (R) · What number has 5 tens and 3 ones? = 53 (A) · What number has 5 tens and 9 ones? = 59 (E) · What number has 4 tens and 3 ones? = 43 (S) · What number has 3 tens and 7 ones? = 37 (H) · What number has 1 ten and 8 ones? = 18 (W) · What number has 9 tens and 1 one? = 91 (N) · What number has 4 tens and 1 one? = 41 (U) · What number has 1 ten and 7 ones? = 17 (K) · What number has 7 tens and 5 ones? = 75 (C) · What number has 2 tens and 9 ones? = 29 (P) · What number has 5 tens and 4 ones? = 54 (L) · What number has 1 ten and 5 ones? = 15 (M)
- Clue 2 (Addition): "THE BANDIT WEARS A WATCH ON THE RIGHT WRIST"17 + 17 = 34 (T) · 38 + 20 = 58 (S) · 52 + 37 = 89 (D) · 31 + 44 = 75 (B) · 21 + 10 = 31 (G) · 15 + 11 = 26 (R) · 24 + 39 = 63 (W) · 15 + 31 = 46 (C) · 16 + 13 = 29 (A) · 63 + 30 = 93 (E) · 10 + 14 = 24 (H) · 30 + 32 = 62 (N) · 49 + 27 = 76 (I) · 24 + 45 = 69 (O)
- Clue 3 (Subtraction): "THE SNEAK WAS DISTRACTED BY A SQUEAKY TOY"29 - 5 = 24 (T) · 78 - 3 = 75 (D) · 53 - 35 = 18 (U) · 91 - 34 = 57 (O) · 83 - 31 = 52 (W) · 68 - 14 = 54 (B) · 82 - 35 = 47 (K) · 81 - 9 = 72 (A) · 29 - 12 = 17 (Q) · 96 - 11 = 85 (E) · 55 - 11 = 44 (C) · 24 - 13 = 11 (H) · 72 - 31 = 41 (S) · 56 - 37 = 19 (Y) · 49 - 7 = 42 (I) · 101 - 27 = 74 (R) · 66 - 36 = 30 (N)
- Clue 4 (Skip counting): "FOUND DARK BROWN THREADS FROM A BROWN CAP"Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, ___, 140, 150 = 130 (F) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, ___, 33, 36 = 30 (B) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, ___, 75, 80 = 70 (U) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, ___, 18, 21 = 15 (E) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110 = 90 (K) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, ___, 27, 30 = 24 (C) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, ___, 28, 30 = 26 (N) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65 = 55 (W) · Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15 = 9 (H) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, ___, 14, 16 = 12 (T) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, ___, 130, 140 = 120 (M) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33 = 27 (S) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, ___, 16, 18 = 14 (R) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, ___, 24, 26 = 22 (A) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, ___, 39, 42 = 36 (P) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, ___, 22, 24 = 20 (D) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39 = 33 (O)
- Clue 5 (Missing addends): surviving statement (box 10) → Wyatt Cole4 + ___ = 15 = 11 · 1 + ___ = 2 = 1 · 5 + ___ = 11 = 6 · 10 + ___ = 13 = 3 · 5 + ___ = 10 = 5 · 3 + ___ = 12 = 9 · 3 + ___ = 11 = 8 · 3 + ___ = 10 = 7 · 2 + ___ = 4 = 2 · 1 + ___ = 5 = 4 · 2 + ___ = 14 = 12
About this mystery
- Grade level
- Grade 2 math
- Math topics
- Place value, Addition, Subtraction, Skip counting, Missing addends
- Reading level
- grades 3-4
- Theme
- The Mystery of the Golden Compass — set in The Sunken Temple of Oakhaven
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects