Grade 4Reading: grades 3-4Fractions of a numberRoundingAdditionSubtraction
The Mystery of Jaguar Isle
Someone snuck into the camp headquarters and took the ancient Golden Jaguar Idol! The Junior Explorers must analyze the evidence left behind and figure out who did it.
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 | Main Tool | Gadget | Dominant Hand | Hair Style | Secret Weakness |
|---|---|---|---|---|---|
| Sienna West | Sonar Whistle | Camo Netting | Right-handed | Curly Hair | Squeaky Toy |
| Tara Gomez | Glow Compass | Zip Cord | Left-handed | Braided Hair | Squeaky Toy |
| Caleb Knight | Smoke Bombs | Laser Torch | Left-handed | Spiky Hair | Flashlight |
| Chloe Wilde | Grappling Hook | Decoy Flare | Left-handed | Braided Hair | Squeaky Toy |
| Jax Miller | Sonar Whistle | Laser Torch | Left-handed | Curly Hair | Squeaky Toy |
| Mia Chang | Sonar Whistle | Zip Cord | Right-handed | Braided Hair | Squeaky Toy |
| Ella Frost | Smoke Bombs | Decoy Flare | Left-handed | Curly Hair | Flashlight |
| Owen Drake | Smoke Bombs | Laser Torch | Left-handed | Braided Hair | Loud Bell |
| Luke Santos | Grappling Hook | Camo Netting | Left-handed | Braided Hair | Squeaky Toy |
| Finn Connor | Glider Suit | Zip Cord | Right-handed | Spiky Hair | Loud Bell |
| Eli Thorn | Glow Compass | Rocket Boots | Left-handed | Spiky Hair | Loud Bell |
| Ava Sterling | Sonar Whistle | Laser Torch | Left-handed | Curly Hair | Flashlight |
| Zoe Vance | Glider Suit | Laser Torch | Left-handed | Curly Hair | Flashlight |
| Mason Reed | Sonar Whistle | Zip Cord | Right-handed | Spiky Hair | Flashlight |
| Lila Finch | Glider Suit | Zip Cord | Right-handed | Curly Hair | Flashlight |
| Ivy Rhodes | Sonar Whistle | Rocket Boots | Left-handed | Braided Hair | Squeaky Toy |
| Sam Rivera | Smoke Bombs | Camo Netting | Right-handed | Braided Hair | Flashlight |
| Ruby Hayes | Glow Compass | Camo Netting | Left-handed | Braided Hair | Squeaky Toy |
| Noah Mercer | Grappling Hook | Camo Netting | Right-handed | Braided Hair | Squeaky Toy |
| Kai Bennett | Sonar Whistle | Zip Cord | Left-handed | Spiky Hair | Squeaky Toy |
| Cole Hunter | Sonar Whistle | Decoy Flare | Left-handed | Braided Hair | Flashlight |
Clue 1
Fractions of a number
We found a bundle of trail notes, but only a fraction of them belong to the bandit.
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
40
35
16
24
15
38
8
22
T
40
8
23
16
21
38
23
T
40
32
21
16
8
16
18
23
30
14
2
15
9
16
21
5/10 of 80 =T
7/10 of 20 =F
4/8 of 4 =L
4/8 of 48 =B
1/5 of 40 =D
3/5 of 50 =Y
1/10 of 150 =A
9/10 of 20 =C
2/4 of 70 =H
2/8 of 84 =S
2/10 of 190 =N
1/3 of 66 =I
1/8 of 128 =E
2/10 of 115 =O
6/10 of 15 =R
2/4 of 64 =U
0/16 letters found
Clue 2
Rounding
The tracking scanner shows distance estimates rounded to the nearest ten meters.
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
4300
430
30
2900
5000
230
50
300
900
230
2900
7000
1300
50
300
30
200
130
7000
900
1300
T
4300
430
T
4300
430
30
170
30
3700
T
4300
430
230
5000
200
Round 4,321 to the nearest hundredT
Round 199 to the nearest hundredD
Round 2,915 to the nearest hundredS
Round 3,662 to the nearest hundredF
Round 129 to the nearest tenU
Round 28 to the nearest tenE
Round 941 to the nearest hundredW
Round 46 to the nearest tenC
Round 321 to the nearest hundredK
Round 432 to the nearest tenH
Round 4,902 to the nearest thousandN
Round 228 to the nearest tenA
Round 6,791 to the nearest thousandP
Round 174 to the nearest tenL
Round 1,256 to the nearest hundredI
0/15 letters found
Clue 3
Addition
We tallied all the gear supplies left behind by the camp boundary to get a total count.
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
4921
2443
9183
8760
4163
4373
9183
8588
5338
4131
T
4921
7977
4131
9247
6758
8760
T
4921
8184
8588
6968
T
4921
9183
9247
T
4921
2443
9183
3211
8588
8911
9247
6758
T
4921
2546 + 2375 =T
3002 + 1371 =U
4202 + 4386 =A
2240 + 1923 =Q
2734 + 6026 =S
2568 + 5409 =O
2988 + 6259 =D
2233 + 3105 =K
4830 + 4081 =N
6245 + 2938 =E
1633 + 2498 =Y
1495 + 948 =H
2750 + 4218 =C
1499 + 1712 =B
3249 + 4935 =R
3446 + 3312 =I
0/16 letters found
Clue 4
Subtraction
We subtracted the missing flashlights from the main trunk to see how many remained.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
B
3948
2375
3001
3516
3140
2152
3140
8152
3001
3516
2375
5809
1287
2375
3001
8289
3140
5809
5382
2152
2375
2152
4445
4930
8583
8289
3140
3516
8289
5809
3516
3140
2152
5386 - 1438 =B
9336 - 753 =U
2353 - 1066 =T
5221 - 3069 =E
5614 - 684 =O
12217 - 4065 =H
7000 - 1191 =S
3992 - 991 =A
5399 - 17 =W
4695 - 1179 =I
9016 - 4571 =F
4172 - 1797 =R
10186 - 1897 =N
6242 - 3102 =D
0/14 letters found
Clue 5
Fractions of a number — the last clue
Only a fraction of the gold medals stored in the trophy case were taken.
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
1/5 of 40 = ?
1/10 of 30 = ?
4/6 of 18 = ?
2/6 of 6 = ?
2/3 of 6 = ?
4/8 of 10 = ?
2/8 of 24 = ?
1/4 of 40 = ?
1/8 of 8 = ?
1/5 of 35 = ?
5/10 of 22 = ?
Step 2 — cross out the sentence with each answer
1.The villain called wild birds with a sonar whistle, then zipped down the ravine with a zip cord.
2.The villain called wild birds with a sonar whistle, then distracted guards with a decoy flare.
3.The villain swung across the camp on a grappling hook, then hid in the bushes under camo netting.
4.The villain called wild birds with a sonar whistle, then melted the lock using a laser torch.
5.The villain swung across the camp on a grappling hook, then zipped down the ravine with a zip cord.
6.The villain vanished into a cloud of smoke bombs, then escaped up the hill using rocket boots.
7.The villain vanished into a cloud of smoke bombs, then distracted guards with a decoy flare.
8.The villain guided their way with a glow compass, then hid in the bushes under camo netting.
9.The villain guided their way with a glow compass, then zipped down the ravine with a zip cord.
10.The villain vanished into a cloud of smoke bombs, then melted the lock using a laser torch.
11.The villain soared over the trees in a glider suit, then melted the lock using a laser torch.
12.The villain called wild birds with a sonar whistle, then escaped up the hill using rocket boots.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Mystery of Jaguar Isle
Culprit: Tara Gomez (Glow Compass · Zip Cord · Left-handed · Braided Hair · Squeaky Toy)
- Clue 1 (Fractions of a number): "THE BANDIT DOES NOT USE DECOY FLARES"5/10 of 80 = 40 (T) · 7/10 of 20 = 14 (F) · 4/8 of 4 = 2 (L) · 4/8 of 48 = 24 (B) · 1/5 of 40 = 8 (D) · 3/5 of 50 = 30 (Y) · 1/10 of 150 = 15 (A) · 9/10 of 20 = 18 (C) · 2/4 of 70 = 35 (H) · 2/8 of 84 = 21 (S) · 2/10 of 190 = 38 (N) · 1/3 of 66 = 22 (I) · 1/8 of 128 = 16 (E) · 2/10 of 115 = 23 (O) · 6/10 of 15 = 9 (R) · 2/4 of 64 = 32 (U)
- Clue 2 (Rounding): "THE SNACK WAS PICKED UP WITH THE LEFT HAND"Round 4,321 to the nearest hundred = 4300 (T) · Round 199 to the nearest hundred = 200 (D) · Round 2,915 to the nearest hundred = 2900 (S) · Round 3,662 to the nearest hundred = 3700 (F) · Round 129 to the nearest ten = 130 (U) · Round 28 to the nearest ten = 30 (E) · Round 941 to the nearest hundred = 900 (W) · Round 46 to the nearest ten = 50 (C) · Round 321 to the nearest hundred = 300 (K) · Round 432 to the nearest ten = 430 (H) · Round 4,902 to the nearest thousand = 5000 (N) · Round 228 to the nearest ten = 230 (A) · Round 6,791 to the nearest thousand = 7000 (P) · Round 174 to the nearest ten = 170 (L) · Round 1,256 to the nearest hundred = 1300 (I)
- Clue 3 (Addition): "THE SQUEAKY TOY DISTRACTED THE BANDIT"2546 + 2375 = 4921 (T) · 3002 + 1371 = 4373 (U) · 4202 + 4386 = 8588 (A) · 2240 + 1923 = 4163 (Q) · 2734 + 6026 = 8760 (S) · 2568 + 5409 = 7977 (O) · 2988 + 6259 = 9247 (D) · 2233 + 3105 = 5338 (K) · 4830 + 4081 = 8911 (N) · 6245 + 2938 = 9183 (E) · 1633 + 2498 = 4131 (Y) · 1495 + 948 = 2443 (H) · 2750 + 4218 = 6968 (C) · 1499 + 1712 = 3211 (B) · 3249 + 4935 = 8184 (R) · 3446 + 3312 = 6758 (I)
- Clue 4 (Subtraction): "BRAIDED HAIR STRANDS WERE FOUND INSIDE"5386 - 1438 = 3948 (B) · 9336 - 753 = 8583 (U) · 2353 - 1066 = 1287 (T) · 5221 - 3069 = 2152 (E) · 5614 - 684 = 4930 (O) · 12217 - 4065 = 8152 (H) · 7000 - 1191 = 5809 (S) · 3992 - 991 = 3001 (A) · 5399 - 17 = 5382 (W) · 4695 - 1179 = 3516 (I) · 9016 - 4571 = 4445 (F) · 4172 - 1797 = 2375 (R) · 10186 - 1897 = 8289 (N) · 6242 - 3102 = 3140 (D)
- Clue 5 (Fractions of a number): surviving statement (box 9) → Tara Gomez1/5 of 40 = 8 · 1/10 of 30 = 3 · 4/6 of 18 = 12 · 2/6 of 6 = 2 · 2/3 of 6 = 4 · 4/8 of 10 = 5 · 2/8 of 24 = 6 · 1/4 of 40 = 10 · 1/8 of 8 = 1 · 1/5 of 35 = 7 · 5/10 of 22 = 11
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Fractions of a number, Rounding, Addition, Subtraction
- Reading level
- grades 3-4
- Theme
- The Mystery of Jaguar Isle — set in Jaguar Isle Exploration Camp
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects