Grade 7Reading: grades 7-9RoundingBar modelsIntegersPercentagesMissing addends
The Canopy Ruins Mystery
The priceless Sunstone Scepter has been stolen from the deep vaults of the Obsidian Canopy temple! The head archeologist was locked in a supply crate, and the thief fled into the dense jungle. We have a list of twenty-four suspect explorers who were near the camp. Decipher the clues left behind to unmask the rogue explorer!
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 | Archeological Specialty | Signature Gear | Scribbling Hand | Mud Smudge Color | Phobia |
|---|---|---|---|---|---|
| Lara Croft | scaling ruins | leather satchel | left handed journal | black peat mud | fear of spiders |
| Rick OConnell | mapping caverns | rugged canteen | left handed journal | red clay mud | fear of heights |
| Marco Polo | disarming traps | leather satchel | left handed journal | red clay mud | fear of spiders |
| Amelia Earhart | mapping caverns | leather satchel | left handed journal | black peat mud | fear of spiders |
| Claire Redfield | disarming traps | grappling hook | left handed journal | grey silt mud | fear of spiders |
| Evelyn Carnahan | disarming traps | machete tool | left handed journal | red clay mud | fear of spiders |
| Chloe Frazer | mapping caverns | machete tool | left handed journal | grey silt mud | fear of spiders |
| Chris Redfield | scaling ruins | headlamp visor | right handed journal | grey silt mud | fear of enclosed spaces |
| Ellie Sattler | deciphering runes | machete tool | left handed journal | red clay mud | fear of enclosed spaces |
| John Cabot | scaling ruins | grappling hook | right handed journal | grey silt mud | fear of enclosed spaces |
| Marion Ravenwood | mapping caverns | machete tool | right handed journal | grey silt mud | fear of spiders |
| Benjamin Gates | excavating fossils | leather satchel | right handed journal | red clay mud | fear of spiders |
| Indiana Jones | deciphering runes | grappling hook | right handed journal | grey silt mud | fear of spiders |
| Leon Kennedy | mapping caverns | rugged canteen | left handed journal | black peat mud | fear of enclosed spaces |
| Alan Grant | scaling ruins | rugged canteen | left handed journal | grey silt mud | fear of spiders |
| Jill Valentine | disarming traps | rugged canteen | left handed journal | grey silt mud | fear of spiders |
| Percy Fawcett | disarming traps | headlamp visor | left handed journal | grey silt mud | fear of spiders |
| Nathan Drake | scaling ruins | grappling hook | left handed journal | grey silt mud | fear of enclosed spaces |
| Samuel Drake | excavating fossils | headlamp visor | left handed journal | grey silt mud | fear of spiders |
| Victor Sullivan | excavating fossils | headlamp visor | left handed journal | red clay mud | fear of spiders |
| Danny Boy | scaling ruins | rugged canteen | left handed journal | black peat mud | fear of spiders |
Clue 1
Rounding
To calculate the escape route, we must examine the GPS tracker left behind. The damaged device only displays distance values rounded to the nearest ten kilometers, requiring some quick estimations to narrow down the path.
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
900
1100
430
30
50
2900
110
430
2000
290
2000
370
50
T
900
4300
30
290
370
2900
200
3700
200
370
T
900
430
430
370
Round 906 to the nearest hundredT
Round 373 to the nearest tenN
Round 33 to the nearest tenR
Round 1,085 to the nearest hundredH
Round 241 to the nearest hundredA
Round 47 to the nearest tenO
Round 428 to the nearest tenE
Round 2,888 to the nearest hundredG
Round 288 to the nearest tenI
Round 109 to the nearest tenU
Round 4,260 to the nearest hundredB
Round 3,748 to the nearest hundredC
Round 1,590 to the nearest thousandD
0/13 letters found
Clue 2
Bar model word problems
A stone tablet carved with segmented blocks reveals the weight distribution needed to disarm the final temple security gate. We can compare these visual bar models to find the relative ratios of the mechanism.
Draw a bar model to solve each word problem. Its answer reveals a letter — write the letters in the boxes to fill in the missing word.
Awitnesssawthevillainwas .
L
18
113
76
50
116
73
60
D
113
D
J
O
U
R
60
73
L
18
The lead guide has 3 times as many machete blades as a teammate. The teammate has 6 machete blades. How many machete blades does the lead guide have?
draw a bar model
Answer:→L
The lead guide used 3/5 of the stone tablets on the first day. The other 20 stone tablets were used the next day. How many stone tablets were there in all?
draw a bar model
Answer:→T
The red team has 142 brass compasses and the blue team has 26 brass compasses. How many more brass compasses does the red team have?
draw a bar model
Answer:→H
One group collected 3 jungle vines and another group collected 70 jungle vines. How many jungle vines in all?
draw a bar model
Answer:→A
The lead guide has 228 ancient coins, packed 3 to a bag. How many bags can be filled?
draw a bar model
Answer:→F
One group collected 103 jungle vines and another group collected 10 jungle vines. How many jungle vines in all?
draw a bar model
Answer:→E
The lead guide has 5 times as many brass compasses as a teammate. The teammate has 12 brass compasses. How many brass compasses does the lead guide have?
draw a bar model
Answer:→N
0/7 letters found
Clue 3
Integers
The temple elevator shaft rises and falls past several subterranean levels. By tracking the positive climbs and negative drops through the underground ruins, we can pinpoint the exact floor where the suspect hid.
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
6
16
30
T
6
16
11
30
4
13
8
27
4
13
29
9
8
16
8
13
9
25
30
12
12
12
1
11
10
30
13
(-5) + 11 =T
(-4) + 5 =P
(-15) + 27 =S
(-7) + 11 =F
(-1) + 30 =O
(-12) + 23 =I
(-4) + 31 =N
5 - (-11) =H
28 - (-2) =E
(-15) + 24 =M
(-7) + 15 =A
(-4) + 17 =R
(-5) + 15 =D
(-5) + 30 =L
0/14 letters found
Clue 4
Percentages
The camp solar generator is slowly draining, and the decoded ruins map is only partially downloaded. We must compute the exact percentage of data recovered before the power drops to absolute zero.
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
15
45
31
22
25
25
10
50
26
10
A
15
44
35
A
15
50
23
16
10
40
45
59
26
25
27
32
50
10% of 150 =A
40% of 40 =R
10% of 500 =D
50% of 118 =I
10% of 220 =O
5% of 800 =Y
75% of 60 =S
25% of 124 =P
5% of 520 =L
20% of 50 =E
50% of 50 =T
50% of 88 =F
5% of 460 =G
5% of 640 =U
50% of 70 =H
10% of 270 =M
0/16 letters found
Clue 5
Missing addends — the last clue
To open the sealed obsidian chest, we need to balance the ancient stone scales. The left side holds a heavy brass relic, but the right side requires a precise missing weight value to level the beam perfectly.
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
37 + ___ = 46
36 + ___ = 47
17 + ___ = 18
25 + ___ = 31
7 + ___ = 15
28 + ___ = 33
6 + ___ = 10
24 + ___ = 34
5 + ___ = 17
26 + ___ = 29
28 + ___ = 30
Step 2 — cross out the sentence with each answer
1.The villain cracked the hidden code on the vault door, then escaped on a roaring dirt bike.
2.The villain scrambled up the crumbling stone wall, then dashed toward the secret river boat.
3.The villain cracked the hidden code on the vault door, then hid behind the waterfall basin.
4.The villain slipped past the ancient poison darts, then dropped a trail of golden coins.
5.The villain brushed through the giant ferns, then hid behind the waterfall basin.
6.The villain scrambled up the crumbling stone wall, then escaped on a roaring dirt bike.
7.The villain scrambled up the crumbling stone wall, then dropped a trail of golden coins.
8.The villain swung across the flooded river gorge, then vanished into the thick fog.
9.The villain slipped past the ancient poison darts, then vanished into the thick fog.
10.The villain brushed through the giant ferns, then escaped on a roaring dirt bike.
11.The villain slipped past the ancient poison darts, then escaped on a roaring dirt bike.
12.The villain scrambled up the crumbling stone wall, then hid behind the waterfall basin.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Canopy Ruins Mystery
Culprit: Chloe Frazer (mapping caverns · machete tool · left handed journal · grey silt mud · fear of spiders)
- Clue 1 (Rounding): "THE ROGUE DID NOT BRING A CANTEEN"Round 906 to the nearest hundred = 900 (T) · Round 373 to the nearest ten = 370 (N) · Round 33 to the nearest ten = 30 (R) · Round 1,085 to the nearest hundred = 1100 (H) · Round 241 to the nearest hundred = 200 (A) · Round 47 to the nearest ten = 50 (O) · Round 428 to the nearest ten = 430 (E) · Round 2,888 to the nearest hundred = 2900 (G) · Round 288 to the nearest ten = 290 (I) · Round 109 to the nearest ten = 110 (U) · Round 4,260 to the nearest hundred = 4300 (B) · Round 3,748 to the nearest hundred = 3700 (C) · Round 1,590 to the nearest thousand = 2000 (D)
- Clue 2 (Bar model word problems): "LEFT HANDED JOURNAL"The lead guide has 3 times as many machete blades as a teammate. The teammate has 6 machete blades. How many machete blades does the lead guide have? = 18 (L) · The lead guide used 3/5 of the stone tablets on the first day. The other 20 stone tablets were used the next day. How many stone tablets were there in all? = 50 (T) · The red team has 142 brass compasses and the blue team has 26 brass compasses. How many more brass compasses does the red team have? = 116 (H) · One group collected 3 jungle vines and another group collected 70 jungle vines. How many jungle vines in all? = 73 (A) · The lead guide has 228 ancient coins, packed 3 to a bag. How many bags can be filled? = 76 (F) · One group collected 103 jungle vines and another group collected 10 jungle vines. How many jungle vines in all? = 113 (E) · The lead guide has 5 times as many brass compasses as a teammate. The teammate has 12 brass compasses. How many brass compasses does the lead guide have? = 60 (N)
- Clue 3 (Integers): "THE THIEF RAN FROM A HARMLESS SPIDER"(-5) + 11 = 6 (T) · (-4) + 5 = 1 (P) · (-15) + 27 = 12 (S) · (-7) + 11 = 4 (F) · (-1) + 30 = 29 (O) · (-12) + 23 = 11 (I) · (-4) + 31 = 27 (N) · 5 - (-11) = 16 (H) · 28 - (-2) = 30 (E) · (-15) + 24 = 9 (M) · (-7) + 15 = 8 (A) · (-4) + 17 = 13 (R) · (-5) + 15 = 10 (D) · (-5) + 30 = 25 (L)
- Clue 4 (Percentages): "A SPOTTED LEAF HAD GREY SILT MUD"10% of 150 = 15 (A) · 40% of 40 = 16 (R) · 10% of 500 = 50 (D) · 50% of 118 = 59 (I) · 10% of 220 = 22 (O) · 5% of 800 = 40 (Y) · 75% of 60 = 45 (S) · 25% of 124 = 31 (P) · 5% of 520 = 26 (L) · 20% of 50 = 10 (E) · 50% of 50 = 25 (T) · 50% of 88 = 44 (F) · 5% of 460 = 23 (G) · 5% of 640 = 32 (U) · 50% of 70 = 35 (H) · 10% of 270 = 27 (M)
- Clue 5 (Missing addends): surviving statement (box 7) → Chloe Frazer37 + ___ = 46 = 9 · 36 + ___ = 47 = 11 · 17 + ___ = 18 = 1 · 25 + ___ = 31 = 6 · 7 + ___ = 15 = 8 · 28 + ___ = 33 = 5 · 6 + ___ = 10 = 4 · 24 + ___ = 34 = 10 · 5 + ___ = 17 = 12 · 26 + ___ = 29 = 3 · 28 + ___ = 30 = 2
About this mystery
- Grade level
- Grade 7 math
- Math topics
- Rounding, Bar models, Integers, Percentages, Missing addends
- Reading level
- grades 7-9
- Theme
- The Canopy Ruins Mystery — set in The misty jungle ruins of the Obsidian Canopy
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects