Grade 7Reading: grades 3-4AdditionSubtractionMultiplicationSkip countingDivision
The Case of the Missing Golden Compass
Someone snuck into the Cloudtop Island Observatory and swiped the ancient Golden Compass! The Junior Rangers are on the case to examine clues, crack the codes, and track down 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 | Travel Gear | Scout Tool | Dominant Hand | Hat Color | Feared Item |
|---|---|---|---|---|---|
| Riley | Climbing Boots | Decoder Ring | Right Handed | Dark Blue Hat | Loud Whistles |
| Sawyer | Zip Line | Signal Flare | Left Handed | Forest Green Hat | Squeaky Toys |
| Skyler | Climbing Boots | Signal Flare | Right Handed | Forest Green Hat | Squeaky Toys |
| Peyton | Smoke Bombs | Flashlight Gloves | Left Handed | Bright Red Hat | Squeaky Toys |
| Sam | Climbing Boots | Spyglass | Left Handed | Bright Red Hat | Squeaky Toys |
| Parker | Grappling Hook | Compass Watch | Right Handed | Forest Green Hat | Squeaky Toys |
| Logan | Smoke Bombs | Flashlight Gloves | Left Handed | Forest Green Hat | Squeaky Toys |
| Kai | Zip Line | Decoder Ring | Left Handed | Bright Red Hat | Bright Lights |
| Rowan | Smoke Bombs | Spyglass | Left Handed | Forest Green Hat | Squeaky Toys |
| Emerson | Zip Line | Decoder Ring | Left Handed | Forest Green Hat | Squeaky Toys |
| Alex | Smoke Bombs | Signal Flare | Right Handed | Dark Blue Hat | Loud Whistles |
| Casey | Grappling Hook | Decoder Ring | Left Handed | Bright Red Hat | Loud Whistles |
| Morgan | Grappling Hook | Spyglass | Left Handed | Forest Green Hat | Bright Lights |
| Reese | Glider Wings | Compass Watch | Right Handed | Forest Green Hat | Squeaky Toys |
| Dakota | Grappling Hook | Signal Flare | Right Handed | Dark Blue Hat | Squeaky Toys |
| Harper | Climbing Boots | Spyglass | Left Handed | Forest Green Hat | Bright Lights |
| Hayden | Zip Line | Decoder Ring | Left Handed | Dark Blue Hat | Loud Whistles |
| Jordan | Climbing Boots | Flashlight Gloves | Left Handed | Forest Green Hat | Squeaky Toys |
| Taylor | Glider Wings | Signal Flare | Left Handed | Bright Red Hat | Bright Lights |
| Avery | Smoke Bombs | Decoder Ring | Right Handed | Forest Green Hat | Loud Whistles |
| Kendall | Smoke Bombs | Flashlight Gloves | Right Handed | Bright Red Hat | Squeaky Toys |
Clue 1
Addition
The Junior Rangers gather all recovered trail journals to count up total clue pages.
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
6952
4234
7379
6150
3277
6562
6562
3753
3277
8840
4599
3397
7379
4588
8840
3397
T
6952
8249
4588
7379
3753
4599
7379
9330
3397
4599
7379
4804
4804
3277
8840
3056
3126 + 3826 =T
1680 + 2073 =A
3224 + 5025 =U
3959 + 3420 =E
2497 + 3653 =V
3455 + 5385 =N
1773 + 1504 =I
2839 + 1395 =H
2026 + 1030 =G
1555 + 3044 =D
1519 + 1878 =O
2934 + 1654 =S
1993 + 2811 =R
4771 + 4559 =C
2205 + 4357 =L
0/15 letters found
Clue 2
Subtraction
Scout Maya compares the stolen supplies with what remains in the camp supply trunk.
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
4025
4028
1987
4062
6028
4062
4056
1987
4093
T
4025
1478
4660
1278
T
4025
1987
5885
1278
T
4025
1987
4062
1478
2457
T
4025
4028
1690
1987
4423
T
4025
4028
1627
5885
8632
8180 - 4155 =T
4204 - 2514 =L
6413 - 4426 =E
2573 - 946 =A
8380 - 3720 =R
1859 - 581 =O
3111 - 654 =I
4229 - 201 =H
5527 - 1465 =S
7318 - 1290 =U
9498 - 3613 =N
5966 - 4488 =W
13010 - 4378 =D
7823 - 3767 =P
5924 - 1501 =F
8022 - 3929 =C
0/16 letters found
Clue 3
Multiplication facts (1-12)
The search team inspects several identical gear crates stacked in neat 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.
T
66
80
6
28
99
6
33
48
144
33
99
11
16
16
63
80
6
99
33
T
66
11
35
28
12
40
6
33
48
6
5
11 × 6 =T
7 × 5 =Y
7 × 4 =S
11 × 9 =N
2 × 8 =F
3 × 11 =A
6 × 8 =K
3 × 2 =E
3 × 4 =Q
5 × 8 =U
12 × 12 =R
9 × 7 =W
5 × 1 =D
10 × 8 =H
1 × 11 =O
0/15 letters found
Clue 4
Skip counting
The trackers follow a series of marked trail posts spaced at equal steps.
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
6
39
55
70
70
21
22
A
6
8
8
22
55
70
A
6
80
33
21
A
6
39
39
70
80
16
21
A
6
40
55
A
6
21
20
22
Skip-count by 2s. Fill the blank: 2, 4, ___, 8, 10A
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, ___, 80, 90E
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, ___, 24, 26H
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, ___, 90, 100D
Skip-count by 10s. Fill the blank: 10, 20, 30, ___, 50, 60B
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65R
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, ___, 42, 45G
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39S
Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12T
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, ___, 24, 27N
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20O
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, ___, 22, 24C
0/12 letters found
Clue 5
Division facts (1-12) — the last clue
The camp director splits the remaining flashlights evenly among the search squads.
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
48 ÷ 6 = ?
77 ÷ 7 = ?
44 ÷ 11 = ?
20 ÷ 2 = ?
24 ÷ 4 = ?
108 ÷ 12 = ?
72 ÷ 6 = ?
5 ÷ 5 = ?
9 ÷ 3 = ?
6 ÷ 3 = ?
14 ÷ 2 = ?
Step 2 — cross out the sentence with each answer
1.The villain swung in on a grappling hook, then scouted ahead with a spyglass.
2.The villain scaled the wall in climbing boots, then fired off a signal flare.
3.The villain glided across on glider wings, then unlocked the chest with a decoder ring.
4.The villain dropped smoke bombs to hide, then lit the path with flashlight gloves.
5.The villain zipped away on a zip line, then fired off a signal flare.
6.The villain dropped smoke bombs to hide, then fired off a signal flare.
7.The villain dropped smoke bombs to hide, then checked the time on a compass watch.
8.The villain dropped smoke bombs to hide, then scouted ahead with a spyglass.
9.The villain swung in on a grappling hook, then unlocked the chest with a decoder ring.
10.The villain scaled the wall in climbing boots, then checked the time on a compass watch.
11.The villain scaled the wall in climbing boots, then lit the path with flashlight gloves.
12.The villain glided across on glider wings, then fired off a signal flare.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Case of the Missing Golden Compass
Culprit: Sawyer (Zip Line · Signal Flare · Left Handed · Forest Green Hat · Squeaky Toys)
- Clue 1 (Addition): "THE VILLAIN DOES NOT USE A DECODER RING"3126 + 3826 = 6952 (T) · 1680 + 2073 = 3753 (A) · 3224 + 5025 = 8249 (U) · 3959 + 3420 = 7379 (E) · 2497 + 3653 = 6150 (V) · 3455 + 5385 = 8840 (N) · 1773 + 1504 = 3277 (I) · 2839 + 1395 = 4234 (H) · 2026 + 1030 = 3056 (G) · 1555 + 3044 = 4599 (D) · 1519 + 1878 = 3397 (O) · 2934 + 1654 = 4588 (S) · 1993 + 2811 = 4804 (R) · 4771 + 4559 = 9330 (C) · 2205 + 4357 = 6562 (L)
- Clue 2 (Subtraction): "THE SUSPECT WROTE NOTES WITH LEFT HAND"8180 - 4155 = 4025 (T) · 4204 - 2514 = 1690 (L) · 6413 - 4426 = 1987 (E) · 2573 - 946 = 1627 (A) · 8380 - 3720 = 4660 (R) · 1859 - 581 = 1278 (O) · 3111 - 654 = 2457 (I) · 4229 - 201 = 4028 (H) · 5527 - 1465 = 4062 (S) · 7318 - 1290 = 6028 (U) · 9498 - 3613 = 5885 (N) · 5966 - 4488 = 1478 (W) · 13010 - 4378 = 8632 (D) · 7823 - 3767 = 4056 (P) · 5924 - 1501 = 4423 (F) · 8022 - 3929 = 4093 (C)
- Clue 3 (Multiplication facts (1-12)): "THE SNEAK RAN OFF WHEN A TOY SQUEAKED"11 × 6 = 66 (T) · 7 × 5 = 35 (Y) · 7 × 4 = 28 (S) · 11 × 9 = 99 (N) · 2 × 8 = 16 (F) · 3 × 11 = 33 (A) · 6 × 8 = 48 (K) · 3 × 2 = 6 (E) · 3 × 4 = 12 (Q) · 5 × 8 = 40 (U) · 12 × 12 = 144 (R) · 9 × 7 = 63 (W) · 5 × 1 = 5 (D) · 10 × 8 = 80 (H) · 1 × 11 = 11 (O)
- Clue 4 (Skip counting): "A GREEN HAT THREAD SNAGGED ON A BRANCH"Skip-count by 2s. Fill the blank: 2, 4, ___, 8, 10 = 6 (A) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, ___, 80, 90 = 70 (E) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, ___, 24, 26 = 22 (H) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, ___, 90, 100 = 80 (D) · Skip-count by 10s. Fill the blank: 10, 20, 30, ___, 50, 60 = 40 (B) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65 = 55 (R) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, ___, 42, 45 = 39 (G) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39 = 33 (S) · Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12 = 8 (T) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, ___, 24, 27 = 21 (N) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20 = 16 (O) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, ___, 22, 24 = 20 (C)
- Clue 5 (Division facts (1-12)): surviving statement (box 5) → Sawyer48 ÷ 6 = 8 · 77 ÷ 7 = 11 · 44 ÷ 11 = 4 · 20 ÷ 2 = 10 · 24 ÷ 4 = 6 · 108 ÷ 12 = 9 · 72 ÷ 6 = 12 · 5 ÷ 5 = 1 · 9 ÷ 3 = 3 · 6 ÷ 3 = 2 · 14 ÷ 2 = 7
About this mystery
- Grade level
- Grade 7 math
- Math topics
- Addition, Subtraction, Multiplication, Skip counting, Division
- Reading level
- grades 3-4
- Theme
- The Case of the Missing Golden Compass — set in Cloudtop Island Observatory
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects