Grade 5Reading: grades 5-6RoundingMulti-step word problemsWord problemsFractions of a numberMissing addends
The Lost Sapphire of Temple Peak
The Golden Beetle idol has been snatched from the central altar of Mount Astra. A rogue explorer sneaked past the ancient traps, left behind mysterious clues, and vanished into the jungle. Help Detective Maya follow the trail and unmask 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 | Exploration Tool | Special Gadget | Dominant Hand | Bandana Color | Distraction Item |
|---|---|---|---|---|---|
| Agent Frost | Grappling Hook | Smoke Flare | Right-handed | Crimson Red | Mirror Flash |
| Scout Miller | Compass Torch | Sonic Whistle | Left-handed | Crimson Red | Mirror Flash |
| Scholar Penn | Compass Torch | Sonic Whistle | Right-handed | Crimson Red | Mirror Flash |
| Dr Elena Gomez | Climbing Claws | Mini Drone | Right-handed | Crimson Red | Mirror Flash |
| Pilot Vance | Grappling Hook | Decoder Ring | Left-handed | Crimson Red | Mirror Flash |
| Dr Clara Cruz | Machete | Night Goggles | Left-handed | Crimson Red | Mirror Flash |
| Ranger Bell | Climbing Claws | Smoke Flare | Left-handed | Golden Yellow | Mirror Flash |
| Scholar Vance | Compass Torch | Night Goggles | Left-handed | Cobalt Blue | Mirror Flash |
| Professor Shaw | Grappling Hook | Smoke Flare | Left-handed | Golden Yellow | Chili Powder |
| Navigator Holt | Climbing Claws | Decoder Ring | Left-handed | Crimson Red | Mirror Flash |
| Pilot Sterling | Glider Pack | Mini Drone | Right-handed | Golden Yellow | Mirror Flash |
| Ranger Thorne | Machete | Mini Drone | Right-handed | Crimson Red | Loud Bell |
| Professor Vance | Compass Torch | Night Goggles | Right-handed | Crimson Red | Chili Powder |
| Explorer Blair | Glider Pack | Mini Drone | Right-handed | Crimson Red | Loud Bell |
| Explorer Hayes | Machete | Decoder Ring | Right-handed | Golden Yellow | Chili Powder |
| Ranger Stone | Compass Torch | Mini Drone | Left-handed | Cobalt Blue | Mirror Flash |
| Tracker Reed | Glider Pack | Smoke Flare | Left-handed | Cobalt Blue | Chili Powder |
| Scout Mercer | Compass Torch | Decoder Ring | Left-handed | Crimson Red | Chili Powder |
| Archeologist Finch | Grappling Hook | Smoke Flare | Right-handed | Golden Yellow | Loud Bell |
| Scout Rhodes | Climbing Claws | Mini Drone | Left-handed | Crimson Red | Mirror Flash |
| Navigator Ross | Compass Torch | Smoke Flare | Left-handed | Crimson Red | Chili Powder |
Clue 1
Rounding
Maya inspects the supply crates outside the ruins to count how many rations were looted during the getaway.
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
700
130
50
3000
200
7000
170
1700
1100
T
700
430
300
50
2900
2000
300
T
700
200
2900
50
9000
2900
300
2000
1100
3000
1300
130
1100
2900
T
700
7000
50
Round 700 to the nearest hundredT
Round 172 to the nearest tenP
Round 2,668 to the nearest thousandC
Round 262 to the nearest hundredO
Round 1,846 to the nearest thousandN
Round 1,105 to the nearest hundredI
Round 1,696 to the nearest hundredR
Round 48 to the nearest tenE
Round 433 to the nearest tenD
Round 2,886 to the nearest hundredS
Round 1,339 to the nearest hundredW
Round 8,648 to the nearest thousandA
Round 7,239 to the nearest thousandL
Round 175 to the nearest hundredU
Round 129 to the nearest tenH
0/15 letters found
Clue 2
Multi-step word problems
To open the locked outer gate, Maya must calculate the total energy needed across several steps to power the generator.
Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.
Awitnesssawthevillainwas .
L
17
19
45
10
80
51
67
D
19
D
Lead explorer collected 57 ancient coins in the morning and 45 ancient coins in the afternoon, then split them equally among 6 expedition team. How many ancient coins did each get?L
Lead explorer earned 3 bronze keys in each of 4 rounds, plus 1 bonus bronze keys. Then 3 bronze keys were lost. How many bronze keys are left?T
There were 220 bronze keys in all. 1 expedition team used 16 bronze keys each. The other 4 expedition team shared the rest equally. How many bronze keys did each of the other expedition team get?A
There were 643 carved scarabs in all. 40 carved scarabs were set aside. The rest were shared equally among 9 expedition team. How many carved scarabs did each get?N
Lead explorer collected 8 bronze keys in the morning and 392 bronze keys in the afternoon, then split them equally among 5 expedition team. How many bronze keys did each get?H
Lead explorer collected 33 map fragments in the morning and 5 map fragments in the afternoon, then split them equally among 2 expedition team. How many map fragments did each get?E
There were 196 ancient coins in all. 2 expedition team used 8 ancient coins each. The other 4 expedition team shared the rest equally. How many ancient coins did each of the other expedition team get?F
0/7 letters found
Clue 3
Word problems
The ancient altar radar screen displays approximate distance numbers rounded to the nearest hundred.
Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.
Someonescaredthevillainoffwith .
M
76
67
90
90
22
90
91
54
75
S
H
Lead explorer found 73 map fragments yesterday and 3 more today. How many map fragments in all?M
Lead explorer lined up 10 rows of 9 bronze keys. How many bronze keys in all?R
There were 81 bronze keys. 6 were used up. How many bronze keys are left?A
There were 97 bronze keys. 30 were used up. How many bronze keys are left?I
Lead explorer found 71 map fragments yesterday and 20 more today. How many map fragments in all?F
Lead explorer lined up 9 rows of 6 ruby gems. How many ruby gems in all?L
Lead explorer found 13 carved scarabs yesterday and 9 more today. How many carved scarabs in all?O
0/7 letters found
Clue 4
Fractions of a number
Maya checks the ancient stone map wheel where only a fraction of the carved symbols are illuminated.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
R
21
18
22
33
8
31
18
R
21
4
29
18
R
21
18
4
20
40
28
28
18
22
14
20
34
36
18
34
18
2
5
12
18
22
14
14
R
21
1/3 of 63 =R
1/3 of 84 =G
2/10 of 20 =S
1/5 of 25 =P
2/8 of 116 =W
3/5 of 55 =F
2/10 of 110 =D
4/5 of 45 =H
4/10 of 30 =L
2/4 of 40 =N
4/10 of 5 =M
4/10 of 100 =A
2/8 of 124 =B
2/4 of 36 =E
8/10 of 10 =I
2/10 of 70 =O
4/10 of 85 =T
0/17 letters found
Clue 5
Missing addends — the last clue
Maya weighs decorative idol stones on a balance scale to find how much weight is missing to trigger the door.
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
16 + ___ = 22
20 + ___ = 31
36 + ___ = 41
35 + ___ = 44
30 + ___ = 38
26 + ___ = 27
5 + ___ = 15
9 + ___ = 13
4 + ___ = 6
21 + ___ = 33
13 + ___ = 16
Step 2 — cross out the sentence with each answer
1.The villain scaled the stone wall with climbing claws, then disoriented bats with a sonic whistle.
2.The villain lit the dark passage with a compass torch, then mapped the room using a mini drone.
3.The villain glided off the ledge with a glider pack, then mapped the room using a mini drone.
4.The villain chopped dense vines with a machete, then disoriented bats with a sonic whistle.
5.The villain swung across the pit with a grappling hook, then cracked the door code with a decoder ring.
6.The villain scaled the stone wall with climbing claws, then mapped the room using a mini drone.
7.The villain chopped dense vines with a machete, then scouted the hallway with night goggles.
8.The villain lit the dark passage with a compass torch, then disoriented bats with a sonic whistle.
9.The villain scaled the stone wall with climbing claws, then scouted the hallway with night goggles.
10.The villain swung across the pit with a grappling hook, then scouted the hallway with night goggles.
11.The villain scaled the stone wall with climbing claws, then cracked the door code with a decoder ring.
12.The villain scaled the stone wall with climbing claws, then vanished into smoke from a smoke flare.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Lost Sapphire of Temple Peak
Culprit: Dr Clara Cruz (Machete · Night Goggles · Left-handed · Crimson Red · Mirror Flash)
- Clue 1 (Rounding): "THE CULPRIT DOES NOT USE A SONIC WHISTLE"Round 700 to the nearest hundred = 700 (T) · Round 172 to the nearest ten = 170 (P) · Round 2,668 to the nearest thousand = 3000 (C) · Round 262 to the nearest hundred = 300 (O) · Round 1,846 to the nearest thousand = 2000 (N) · Round 1,105 to the nearest hundred = 1100 (I) · Round 1,696 to the nearest hundred = 1700 (R) · Round 48 to the nearest ten = 50 (E) · Round 433 to the nearest ten = 430 (D) · Round 2,886 to the nearest hundred = 2900 (S) · Round 1,339 to the nearest hundred = 1300 (W) · Round 8,648 to the nearest thousand = 9000 (A) · Round 7,239 to the nearest thousand = 7000 (L) · Round 175 to the nearest hundred = 200 (U) · Round 129 to the nearest ten = 130 (H)
- Clue 2 (Multi-step word problems): "LEFT HANDED"Lead explorer collected 57 ancient coins in the morning and 45 ancient coins in the afternoon, then split them equally among 6 expedition team. How many ancient coins did each get? = 17 (L) · Lead explorer earned 3 bronze keys in each of 4 rounds, plus 1 bonus bronze keys. Then 3 bronze keys were lost. How many bronze keys are left? = 10 (T) · There were 220 bronze keys in all. 1 expedition team used 16 bronze keys each. The other 4 expedition team shared the rest equally. How many bronze keys did each of the other expedition team get? = 51 (A) · There were 643 carved scarabs in all. 40 carved scarabs were set aside. The rest were shared equally among 9 expedition team. How many carved scarabs did each get? = 67 (N) · Lead explorer collected 8 bronze keys in the morning and 392 bronze keys in the afternoon, then split them equally among 5 expedition team. How many bronze keys did each get? = 80 (H) · Lead explorer collected 33 map fragments in the morning and 5 map fragments in the afternoon, then split them equally among 2 expedition team. How many map fragments did each get? = 19 (E) · There were 196 ancient coins in all. 2 expedition team used 8 ancient coins each. The other 4 expedition team shared the rest equally. How many ancient coins did each of the other expedition team get? = 45 (F)
- Clue 3 (Word problems): "MIRROR FLASH"Lead explorer found 73 map fragments yesterday and 3 more today. How many map fragments in all? = 76 (M) · Lead explorer lined up 10 rows of 9 bronze keys. How many bronze keys in all? = 90 (R) · There were 81 bronze keys. 6 were used up. How many bronze keys are left? = 75 (A) · There were 97 bronze keys. 30 were used up. How many bronze keys are left? = 67 (I) · Lead explorer found 71 map fragments yesterday and 20 more today. How many map fragments in all? = 91 (F) · Lead explorer lined up 9 rows of 6 ruby gems. How many ruby gems in all? = 54 (L) · Lead explorer found 13 carved scarabs yesterday and 9 more today. How many carved scarabs in all? = 22 (O)
- Clue 4 (Fractions of a number): "RED FIBERS WERE SNAGGED ON THE TEMPLE DOOR"1/3 of 63 = 21 (R) · 1/3 of 84 = 28 (G) · 2/10 of 20 = 4 (S) · 1/5 of 25 = 5 (P) · 2/8 of 116 = 29 (W) · 3/5 of 55 = 33 (F) · 2/10 of 110 = 22 (D) · 4/5 of 45 = 36 (H) · 4/10 of 30 = 12 (L) · 2/4 of 40 = 20 (N) · 4/10 of 5 = 2 (M) · 4/10 of 100 = 40 (A) · 2/8 of 124 = 31 (B) · 2/4 of 36 = 18 (E) · 8/10 of 10 = 8 (I) · 2/10 of 70 = 14 (O) · 4/10 of 85 = 34 (T)
- Clue 5 (Missing addends): surviving statement (box 7) → Dr Clara Cruz16 + ___ = 22 = 6 · 20 + ___ = 31 = 11 · 36 + ___ = 41 = 5 · 35 + ___ = 44 = 9 · 30 + ___ = 38 = 8 · 26 + ___ = 27 = 1 · 5 + ___ = 15 = 10 · 9 + ___ = 13 = 4 · 4 + ___ = 6 = 2 · 21 + ___ = 33 = 12 · 13 + ___ = 16 = 3
About this mystery
- Grade level
- Grade 5 math
- Math topics
- Rounding, Multi-step word problems, Word problems, Fractions of a number, Missing addends
- Reading level
- grades 5-6
- Theme
- The Lost Sapphire of Temple Peak — set in The Sunken Ruin of Mount Astra
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects