Grade 3Reading: grades 3-4Place valueAdditionSubtractionRoundingDivision
The Lost Medallion of Sunstone Isle
Someone snuck into the Sunstone Temple and snatched the Golden Sun Medallion! Solve the clues to expose 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 | Gadget | Vehicle | Handedness | Feather Color | Trap Vulnerability |
|---|---|---|---|---|---|
| Aria Arch | Zip Line | Quad Copter | Left Handed | Red Feather | Net Trap |
| Finn Forest | Smoke Bomb | Dirt Bike | Right Handed | Red Feather | Net Trap |
| Milo Moss | Smoke Bomb | Dirt Bike | Right Handed | Green Feather | Loud Horn |
| Noah North | Smoke Bomb | Canoe | Left Handed | Red Feather | Loud Horn |
| Gabe Gear | Grappling Hook | Canoe | Right Handed | Green Feather | Net Trap |
| Sammy Swift | Smoke Bomb | Dirt Bike | Left Handed | Red Feather | Net Trap |
| Owen Oak | Smoke Bomb | Hover Skiff | Left Handed | Green Feather | Water Splash |
| Ella Echo | Grappling Hook | Jungle Buggy | Right Handed | Blue Feather | Loud Horn |
| Nora Nav | Zip Line | Hover Skiff | Left Handed | Red Feather | Water Splash |
| Zoe Zest | Zip Line | Dirt Bike | Left Handed | Red Feather | Loud Horn |
| Chloe Crest | Smoke Bomb | Hover Skiff | Left Handed | Blue Feather | Net Trap |
| Kai Scout | Jet Pack | Hover Skiff | Right Handed | Green Feather | Water Splash |
| Benny Bold | Smoke Bomb | Dirt Bike | Right Handed | Green Feather | Net Trap |
| Ivy Isle | Laser Cutter | Quad Copter | Left Handed | Green Feather | Loud Horn |
| Jake Jungle | Grappling Hook | Hover Skiff | Right Handed | Red Feather | Net Trap |
| Mia Map | Grappling Hook | Jungle Buggy | Left Handed | Blue Feather | Loud Horn |
| Leo Cruz | Grappling Hook | Quad Copter | Left Handed | Red Feather | Net Trap |
| Toby Trail | Zip Line | Canoe | Left Handed | Red Feather | Net Trap |
| Ruby River | Jet Pack | Quad Copter | Right Handed | Green Feather | Water Splash |
| Indiana Max | Smoke Bomb | Hover Skiff | Left Handed | Red Feather | Net Trap |
| Lily Vine | Zip Line | Dirt Bike | Left Handed | Red Feather | Net Trap |
Clue 1
Place value
You study the digits stamped into the temple key pad to read the first mystery 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
100
900
6000
60
400
6000
40
30
1000
500
1000
400
10
T
100
300
60
6000
40
1000
500
5000
T
100
70
500
30
6000
What is the value of the 1 in 4,179?T
What is the value of the 1 in 3,216?O
What is the value of the 9 in 4,925?H
What is the value of the 7 in 370?B
What is the value of the 3 in 2,394?U
What is the value of the 6 in 369?S
What is the value of the 4 in 946?A
What is the value of the 5 in 4,543?I
What is the value of the 4 in 1,483?N
What is the value of the 3 in 7,031?K
What is the value of the 1 in 91,096?D
What is the value of the 5 in 75,817?R
What is the value of the 6 in 6,142?E
0/13 letters found
Clue 2
Addition
You tally up all the jungle trail markers to see how far the suspect traveled.
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
333
317
225
689
741
689
846
225
399
T
333
600
225
613
T
333
910
600
225
613
T
333
317
910
962
674
846
212
799
962
T
333
179 + 154 =T
314 + 648 =N
468 + 442 =A
261 + 138 =C
123 + 102 =E
366 + 480 =P
317 + 283 =L
263 + 426 =S
430 + 369 =I
223 + 451 =D
168 + 149 =H
388 + 225 =F
109 + 103 =R
519 + 222 =U
0/14 letters found
Clue 3
Subtraction
You calculate how many gold coins are missing from the chest by taking away the remainder.
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
802
883
269
330
284
410
330
284
410
284
361
792
792
348
A
802
204
883
792
559
204
204
361
125
792
631
361
792
631
330
361
868
806 - 4 =A
649 - 365 =N
947 - 155 =T
955 - 396 =O
374 - 26 =R
427 - 97 =I
538 - 269 =W
385 - 24 =E
1100 - 232 =F
625 - 215 =G
473 - 269 =P
1264 - 381 =S
954 - 323 =H
344 - 219 =D
0/14 letters found
Clue 4
Rounding
The ancient scout scanner shows rounded distance numbers on its screen.
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
8000
30
7000
4000
7000
T
8000
7000
6000
T
8000
3000
5000
7000
40
90
600
900
4000
60
700
7000
4000
40
7000
60
T
8000
30
7000
700
Round 8,253 to the nearest thousandT
Round 3,343 to the nearest thousandI
Round 63 to the nearest tenA
Round 932 to the nearest hundredN
Round 4,919 to the nearest thousandV
Round 576 to the nearest hundredU
Round 3,779 to the nearest thousandD
Round 37 to the nearest tenF
Round 6,006 to the nearest thousandC
Round 697 to the nearest hundredR
Round 28 to the nearest tenH
Round 7,406 to the nearest thousandE
Round 87 to the nearest tenO
0/13 letters found
Clue 5
Division facts (1-12) — the last clue
You share the remaining supply crates equally among the search teams to track the escape path.
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
55 ÷ 11 = ?
5 ÷ 5 = ?
32 ÷ 8 = ?
14 ÷ 7 = ?
72 ÷ 12 = ?
30 ÷ 10 = ?
70 ÷ 10 = ?
22 ÷ 2 = ?
63 ÷ 7 = ?
90 ÷ 9 = ?
88 ÷ 11 = ?
Step 2 — cross out the sentence with each answer
1.The villain zipped across with a zip line, then flew off on a quad copter.
2.The villain blasted off with a jet pack, then roared off on a dirt bike.
3.The villain swung away with a grappling hook, then paddled away in a canoe.
4.The villain escaped under a smoke bomb, then sped away on a hover skiff.
5.The villain swung away with a grappling hook, then flew off on a quad copter.
6.The villain escaped under a smoke bomb, then roared off on a dirt bike.
7.The villain swung away with a grappling hook, then drove off in a jungle buggy.
8.The villain cut through bars with a laser, then sped away on a hover skiff.
9.The villain zipped across with a zip line, then drove off in a jungle buggy.
10.The villain swung away with a grappling hook, then sped away on a hover skiff.
11.The villain escaped under a smoke bomb, then flew off on a quad copter.
12.The villain zipped across with a zip line, then paddled away in a canoe.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Lost Medallion of Sunstone Isle
Culprit: Toby Trail (Zip Line · Canoe · Left Handed · Red Feather · Net Trap)
- Clue 1 (Place value): "THE SNEAK DID NOT USE A DIRT BIKE"What is the value of the 1 in 4,179? = 100 (T) · What is the value of the 1 in 3,216? = 10 (O) · What is the value of the 9 in 4,925? = 900 (H) · What is the value of the 7 in 370? = 70 (B) · What is the value of the 3 in 2,394? = 300 (U) · What is the value of the 6 in 369? = 60 (S) · What is the value of the 4 in 946? = 40 (A) · What is the value of the 5 in 4,543? = 500 (I) · What is the value of the 4 in 1,483? = 400 (N) · What is the value of the 3 in 7,031? = 30 (K) · What is the value of the 1 in 91,096? = 1000 (D) · What is the value of the 5 in 75,817? = 5000 (R) · What is the value of the 6 in 6,142? = 6000 (E)
- Clue 2 (Addition): "THE SUSPECT LEFT A LEFT HAND PRINT"179 + 154 = 333 (T) · 314 + 648 = 962 (N) · 468 + 442 = 910 (A) · 261 + 138 = 399 (C) · 123 + 102 = 225 (E) · 366 + 480 = 846 (P) · 317 + 283 = 600 (L) · 263 + 426 = 689 (S) · 430 + 369 = 799 (I) · 223 + 451 = 674 (D) · 168 + 149 = 317 (H) · 388 + 225 = 613 (F) · 109 + 103 = 212 (R) · 519 + 222 = 741 (U)
- Clue 3 (Subtraction): "A SWINGING NET TRAP STOPPED THE THIEF"806 - 4 = 802 (A) · 649 - 365 = 284 (N) · 947 - 155 = 792 (T) · 955 - 396 = 559 (O) · 374 - 26 = 348 (R) · 427 - 97 = 330 (I) · 538 - 269 = 269 (W) · 385 - 24 = 361 (E) · 1100 - 232 = 868 (F) · 625 - 215 = 410 (G) · 473 - 269 = 204 (P) · 1264 - 381 = 883 (S) · 954 - 323 = 631 (H) · 344 - 219 = 125 (D)
- Clue 4 (Rounding): "THE DETECTIVE FOUND A RED FEATHER"Round 8,253 to the nearest thousand = 8000 (T) · Round 3,343 to the nearest thousand = 3000 (I) · Round 63 to the nearest ten = 60 (A) · Round 932 to the nearest hundred = 900 (N) · Round 4,919 to the nearest thousand = 5000 (V) · Round 576 to the nearest hundred = 600 (U) · Round 3,779 to the nearest thousand = 4000 (D) · Round 37 to the nearest ten = 40 (F) · Round 6,006 to the nearest thousand = 6000 (C) · Round 697 to the nearest hundred = 700 (R) · Round 28 to the nearest ten = 30 (H) · Round 7,406 to the nearest thousand = 7000 (E) · Round 87 to the nearest ten = 90 (O)
- Clue 5 (Division facts (1-12)): surviving statement (box 12) → Toby Trail55 ÷ 11 = 5 · 5 ÷ 5 = 1 · 32 ÷ 8 = 4 · 14 ÷ 7 = 2 · 72 ÷ 12 = 6 · 30 ÷ 10 = 3 · 70 ÷ 10 = 7 · 22 ÷ 2 = 11 · 63 ÷ 7 = 9 · 90 ÷ 9 = 10 · 88 ÷ 11 = 8
About this mystery
- Grade level
- Grade 3 math
- Math topics
- Place value, Addition, Subtraction, Rounding, Division
- Reading level
- grades 3-4
- Theme
- The Lost Medallion of Sunstone Isle — set in Sunstone Isle Jungle
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects