Grade 4Reading: grades 3-4RoundingAdditionSubtractionMultiplicationDivision
The Lost Compass of Sun Valley
Someone snuck into the camp tent and swapped the golden compass with a painted rock! The team needs your detective skills to inspect the clues and catch the culprit before sunset.
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 | Tricky Tool | Dominant Hand | Hair Style | Secret Weakness |
|---|---|---|---|---|---|
| Rover Rex | Grappling Hook | Smoke Bomb | Left Handed | Neon Yellow Hair | Loud Bugle Horn |
| Finder Fred | Grappling Hook | Flash Powder | Left Handed | Dark Braided Hair | Itchy Jungle Ferns |
| Agent Maya | Compass Watch | Stun Whistle | Right Handed | Dark Braided Hair | Squirting Water Toy |
| Surveyor Sal | Compass Watch | Net Launcher | Left Handed | Neon Yellow Hair | Squirting Water Toy |
| Digger Dan | Grappling Hook | Decoy Map | Left Handed | Neon Yellow Hair | Squirting Water Toy |
| Tracker Tina | Pocket Torch | Flash Powder | Left Handed | Neon Yellow Hair | Itchy Jungle Ferns |
| Traverser Tom | Compass Watch | Flash Powder | Left Handed | Dark Braided Hair | Itchy Jungle Ferns |
| Trekker Tess | Grappling Hook | Net Launcher | Left Handed | Neon Yellow Hair | Loud Bugle Horn |
| Voyager Vera | Grappling Hook | Flash Powder | Left Handed | Bright Red Hair | Loud Bugle Horn |
| Ranger Rita | Pocket Torch | Stun Whistle | Right Handed | Dark Braided Hair | Squirting Water Toy |
| Climber Cliff | Grappling Hook | Decoy Map | Left Handed | Dark Braided Hair | Loud Bugle Horn |
| Captain Leo | Signal Mirror | Decoy Map | Right Handed | Dark Braided Hair | Itchy Jungle Ferns |
| Hiker Hank | Signal Mirror | Smoke Bomb | Left Handed | Bright Red Hair | Squirting Water Toy |
| Pioneer Pam | Rope Launcher | Stun Whistle | Right Handed | Bright Red Hair | Loud Bugle Horn |
| Jungle Jack | Rope Launcher | Flash Powder | Left Handed | Neon Yellow Hair | Itchy Jungle Ferns |
| Pathfinder Penny | Rope Launcher | Stun Whistle | Left Handed | Neon Yellow Hair | Itchy Jungle Ferns |
| Scouter Skyler | Grappling Hook | Flash Powder | Left Handed | Neon Yellow Hair | Itchy Jungle Ferns |
| Guide Grace | Rope Launcher | Net Launcher | Left Handed | Dark Braided Hair | Loud Bugle Horn |
| Scout Scott | Pocket Torch | Net Launcher | Left Handed | Neon Yellow Hair | Itchy Jungle Ferns |
| Outrider Owen | Pocket Torch | Flash Powder | Right Handed | Neon Yellow Hair | Loud Bugle Horn |
| Navigator Ned | Rope Launcher | Net Launcher | Right Handed | Neon Yellow Hair | Itchy Jungle Ferns |
Clue 1
Rounding
The camp radar screen rounded the thief distance to the nearest hundred meters to estimate their speed.
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
3000
130
1300
7000
1700
9000
9000
1100
1700
70
3700
900
1300
290
70
900
T
3000
2900
290
1300
1100
290
T
3000
2900
70
430
130
1700
290
T
3000
9000
1300
Round 3,244 to the nearest thousandT
Round 434 to the nearest tenW
Round 2,902 to the nearest hundredU
Round 9,031 to the nearest thousandL
Round 131 to the nearest tenH
Round 1,264 to the nearest hundredE
Round 1,723 to the nearest hundredI
Round 290 to the nearest tenS
Round 3,708 to the nearest hundredD
Round 6,694 to the nearest thousandV
Round 72 to the nearest tenN
Round 931 to the nearest hundredO
Round 1,065 to the nearest hundredA
0/13 letters found
Clue 2
Addition
You tally up all the supplies found near the tent site to count how many items were moved.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
W
4411
6979
7428
3411
2662
8113
8113
8113
6042
W
4411
6042
3956
2662
7229
7428
9294
6042
3411
8118
2662
8118
7711
6042
6508
7711
6042
7015
2662
4568
2930 + 1481 =W
1746 + 916 =E
5252 + 2866 =D
4037 + 3674 =M
2868 + 4111 =I
2079 + 3963 =A
4045 + 2463 =P
5174 + 2939 =S
3865 + 5429 =H
1760 + 2196 =L
1658 + 2910 =R
3790 + 3638 =T
4299 + 2930 =F
1655 + 1756 =N
4498 + 2517 =K
0/15 letters found
Clue 3
Subtraction
You compare the total number of gold coins before and after the raid to see how many are missing.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
I
7367
6793
3013
6697
2962
5909
2262
8897
6367
1578
7598
7200
7598
6182
8897
5570
5570
6793
1073
5436
5436
7598
5302
6793
6697
7598
6793
6697
I
7367
7598
7200
11269 - 3902 =I
11002 - 4820 =R
8288 - 2379 =J
8196 - 2626 =S
7733 - 2431 =D
2473 - 211 =U
5522 - 86 =P
9744 - 2544 =F
7754 - 4741 =C
9130 - 1532 =E
3453 - 491 =Y
7202 - 409 =T
13317 - 4420 =N
8057 - 1360 =H
9030 - 2663 =G
2643 - 1570 =O
4280 - 2702 =L
0/17 letters found
Clue 4
Multiplication facts (1-12)
You examine identical supply boxes arranged in equal rows near the footprints.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
N
9
16
7
N
9
2
16
132
132
7
99
84
88
77
121
99
88
72
72
66
7
10
10
16
25
7
N
9
88
132
16
88
8
9 × 1 =N
8 × 1 =F
12 × 6 =S
1 × 10 =T
4 × 4 =E
7 × 1 =O
12 × 7 =H
5 × 5 =D
11 × 12 =L
7 × 11 =I
11 × 6 =P
2 × 1 =Y
11 × 8 =A
11 × 9 =W
11 × 11 =R
0/15 letters found
Clue 5
Division facts (1-12) — the last clue
You divide the clues evenly among the junior rangers so everyone gets a fair share to examine.
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
24 ÷ 4 = ?
40 ÷ 4 = ?
6 ÷ 2 = ?
24 ÷ 2 = ?
10 ÷ 5 = ?
8 ÷ 2 = ?
10 ÷ 2 = ?
88 ÷ 8 = ?
84 ÷ 12 = ?
48 ÷ 6 = ?
6 ÷ 6 = ?
Step 2 — cross out the sentence with each answer
1.The villain lit up the trail with a pocket torch, then dropped a smoke bomb.
2.The villain checked timing on a compass watch, then fired a net launcher.
3.The villain lit up the trail with a pocket torch, then threw flash powder.
4.The villain flashed signals with a mirror, then dropped a smoke bomb.
5.The villain zipped through trees with a rope launcher, then blew a stun whistle.
6.The villain zipped through trees with a rope launcher, then threw flash powder.
7.The villain flashed signals with a mirror, then left a decoy map.
8.The villain zipped through trees with a rope launcher, then fired a net launcher.
9.The villain lit up the trail with a pocket torch, then fired a net launcher.
10.The villain swung across the camp with a grappling hook, then threw flash powder.
11.The villain checked timing on a compass watch, then left a decoy map.
12.The villain zipped through trees with a rope launcher, then dropped a smoke bomb.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Lost Compass of Sun Valley
Culprit: Scout Scott (Pocket Torch · Net Launcher · Left Handed · Neon Yellow Hair · Itchy Jungle Ferns)
- Clue 1 (Rounding): "THE VILLAIN DOES NOT USE A STUN WHISTLE"Round 3,244 to the nearest thousand = 3000 (T) · Round 434 to the nearest ten = 430 (W) · Round 2,902 to the nearest hundred = 2900 (U) · Round 9,031 to the nearest thousand = 9000 (L) · Round 131 to the nearest ten = 130 (H) · Round 1,264 to the nearest hundred = 1300 (E) · Round 1,723 to the nearest hundred = 1700 (I) · Round 290 to the nearest ten = 290 (S) · Round 3,708 to the nearest hundred = 3700 (D) · Round 6,694 to the nearest thousand = 7000 (V) · Round 72 to the nearest ten = 70 (N) · Round 931 to the nearest hundred = 900 (O) · Round 1,065 to the nearest hundred = 1100 (A)
- Clue 2 (Addition): "WITNESS SAW A LEFT HANDED MAP MAKER"2930 + 1481 = 4411 (W) · 1746 + 916 = 2662 (E) · 5252 + 2866 = 8118 (D) · 4037 + 3674 = 7711 (M) · 2868 + 4111 = 6979 (I) · 2079 + 3963 = 6042 (A) · 4045 + 2463 = 6508 (P) · 5174 + 2939 = 8113 (S) · 3865 + 5429 = 9294 (H) · 1760 + 2196 = 3956 (L) · 1658 + 2910 = 4568 (R) · 3790 + 3638 = 7428 (T) · 4299 + 2930 = 7229 (F) · 1655 + 1756 = 3411 (N) · 4498 + 2517 = 7015 (K)
- Clue 3 (Subtraction): "ITCHY JUNGLE FERNS STOPPED THE THIEF"11269 - 3902 = 7367 (I) · 11002 - 4820 = 6182 (R) · 8288 - 2379 = 5909 (J) · 8196 - 2626 = 5570 (S) · 7733 - 2431 = 5302 (D) · 2473 - 211 = 2262 (U) · 5522 - 86 = 5436 (P) · 9744 - 2544 = 7200 (F) · 7754 - 4741 = 3013 (C) · 9130 - 1532 = 7598 (E) · 3453 - 491 = 2962 (Y) · 7202 - 409 = 6793 (T) · 13317 - 4420 = 8897 (N) · 8057 - 1360 = 6697 (H) · 9030 - 2663 = 6367 (G) · 2643 - 1570 = 1073 (O) · 4280 - 2702 = 1578 (L)
- Clue 4 (Multiplication facts (1-12)): "NEON YELLOW HAIR WAS SPOTTED ON A LEAF"9 × 1 = 9 (N) · 8 × 1 = 8 (F) · 12 × 6 = 72 (S) · 1 × 10 = 10 (T) · 4 × 4 = 16 (E) · 7 × 1 = 7 (O) · 12 × 7 = 84 (H) · 5 × 5 = 25 (D) · 11 × 12 = 132 (L) · 7 × 11 = 77 (I) · 11 × 6 = 66 (P) · 2 × 1 = 2 (Y) · 11 × 8 = 88 (A) · 11 × 9 = 99 (W) · 11 × 11 = 121 (R)
- Clue 5 (Division facts (1-12)): surviving statement (box 9) → Scout Scott24 ÷ 4 = 6 · 40 ÷ 4 = 10 · 6 ÷ 2 = 3 · 24 ÷ 2 = 12 · 10 ÷ 5 = 2 · 8 ÷ 2 = 4 · 10 ÷ 2 = 5 · 88 ÷ 8 = 11 · 84 ÷ 12 = 7 · 48 ÷ 6 = 8 · 6 ÷ 6 = 1
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Rounding, Addition, Subtraction, Multiplication, Division
- Reading level
- grades 3-4
- Theme
- The Lost Compass of Sun Valley — set in Sun Valley Jungle Camp
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects