Grade 5Reading: grades 1-2Fractions of a numberOrder of operationsMultiplicationRoundingDivision
The Dinosaur Island Rescue
Someone snuck into the Dino Park and took the golden t-rex egg! Chief Ranger Rex needs our help. The Dino Patrol must track down 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 | Rescue Tool | Special Gadget | Hand Sign | Head Gear | Best Defense |
|---|---|---|---|---|---|
| Cole | Power Grapple | Radar Watch | Right Handed | Red Helmet | Banana Peel |
| Max | Bubble Blaster | Mini Drone | Left Handed | Red Helmet | Banana Peel |
| Maya | Mega Net | Radar Watch | Right Handed | Green Visor | Banana Peel |
| Jax | Power Grapple | Sound Booster | Right Handed | Green Visor | Squeaky Toy |
| Ben | Sticky Rope | Radar Watch | Left Handed | Red Helmet | Squeaky Toy |
| Zoe | Bubble Blaster | Radar Watch | Left Handed | Blue Cap | Squeaky Toy |
| Ivy | Bubble Blaster | Radar Watch | Left Handed | Red Helmet | Banana Peel |
| Kai | Jet Pack | Sound Booster | Right Handed | Red Helmet | Banana Peel |
| Emma | Power Grapple | Mini Drone | Right Handed | Blue Cap | Banana Peel |
| Ruby | Jet Pack | Mini Drone | Right Handed | Red Helmet | Banana Peel |
| Abby | Bubble Blaster | Sound Booster | Right Handed | Red Helmet | Banana Peel |
| Ava | Power Grapple | Laser Pointer | Right Handed | Red Helmet | Banana Peel |
| Toby | Mega Net | Sound Booster | Right Handed | Red Helmet | Sparkly Glitter |
| Leo | Bubble Blaster | Night Goggles | Left Handed | Green Visor | Squeaky Toy |
| Lily | Bubble Blaster | Mini Drone | Right Handed | Red Helmet | Banana Peel |
| Noah | Power Grapple | Radar Watch | Right Handed | Red Helmet | Sparkly Glitter |
| Cody | Sticky Rope | Laser Pointer | Right Handed | Green Visor | Squeaky Toy |
| Sam | Mega Net | Laser Pointer | Left Handed | Green Visor | Sparkly Glitter |
| Mia | Mega Net | Radar Watch | Left Handed | Green Visor | Sparkly Glitter |
| Ella | Jet Pack | Laser Pointer | Left Handed | Blue Cap | Sparkly Glitter |
| Luke | Power Grapple | Laser Pointer | Right Handed | Green Visor | Sparkly Glitter |
Clue 1
Fractions of a number
We find a scrap of paper on the trail. Only a small fraction of the map is left. Let us count the parts.
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
15
38
14
27
7
18
T
15
3
38
14
35
25
2
14
27
7
2
T
15
40
27
14
18
21
12
7
12
25
35
2
7
14
3/8 of 40 =T
2/4 of 70 =R
1/10 of 180 =A
2/4 of 50 =D
2/6 of 42 =E
1/4 of 152 =H
8/10 of 50 =U
3/4 of 4 =C
3/5 of 45 =S
4/8 of 4 =O
5/10 of 14 =N
1/6 of 72 =I
1/8 of 168 =M
0/13 letters found
Clue 2
Order of operations
To unlock the jungle gate we must press the buttons in the right order. First do this then do that.
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
70
7
19
39
40
50
T
70
29
7
19
59
60
39
19
76
T
70
7
19
35
59
59
35
22
7
T
70
7
50
40
76
T
70
67
22
59
50
68
35
T
70
52 + 6 × 3 =T
5 × 12 - 1 =R
12 × 7 - 24 =U
11 × 7 - 1 =D
10 × 7 - 2 =B
1 + 3 × 6 =E
33 + 3 × 2 =S
16 + 8 × 3 =N
10 + 6 × 2 =G
7 × 5 - 6 =C
3 + 2 × 2 =H
8 × 12 - 29 =O
26 + 3 × 8 =A
8 × 6 - 13 =I
0/14 letters found
Clue 3
Multiplication facts (1-12)
We see rows of baby dino tracks in the mud. There are five rows with three prints in each row.
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
9
45
84
120
132
90
T
9
7
45
84
6
120
77
10
56
120
144
56
20
132
90
2
90
132
90
132
90
56
84
84
77
1 × 9 =T
9 × 10 =A
2 × 1 =B
12 × 7 =E
10 × 12 =S
7 × 11 =L
4 × 5 =O
2 × 3 =R
5 × 2 =I
12 × 12 =U
12 × 11 =N
5 × 9 =H
7 × 1 =C
8 × 7 =P
0/14 letters found
Clue 4
Rounding
The radar screen is dusty. It only shows the distance rounded to the nearest ten miles.
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
130
3000
2000
4300
20
2300
1700
5000
170
3000
1700
290
3000
70
2900
3000
500
30
500
170
5000
7000
5000
500
500
290
3000
30
1300
3000
2300
3000
Round 132 to the nearest tenW
Round 1,707 to the nearest thousandF
Round 4,261 to the nearest hundredO
Round 3,094 to the nearest thousandE
Round 294 to the nearest tenH
Round 1,348 to the nearest hundredC
Round 7,048 to the nearest thousandP
Round 172 to the nearest tenR
Round 29 to the nearest tenS
Round 5,171 to the nearest thousandA
Round 74 to the nearest tenL
Round 2,274 to the nearest hundredN
Round 493 to the nearest hundredT
Round 2,902 to the nearest hundredM
Round 23 to the nearest tenU
Round 1,698 to the nearest hundredD
0/16 letters found
Clue 5
Division facts (1-12) — the last clue
We need to share our dino treats equally among the baby raptors so they do not bite.
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 = ?
56 ÷ 8 = ?
12 ÷ 4 = ?
8 ÷ 8 = ?
33 ÷ 3 = ?
48 ÷ 8 = ?
32 ÷ 4 = ?
108 ÷ 9 = ?
40 ÷ 10 = ?
80 ÷ 8 = ?
63 ÷ 7 = ?
Step 2 — cross out the sentence with each answer
1.The villain uses a jet pack to fly over the wall, then flies a mini drone to spot the egg.
2.The villain fires a power grapple to swing inside, then looks at a radar watch for the time.
3.The villain uses a jet pack to fly over the wall, then uses a sound booster to listen.
4.The villain fires a power grapple to swing inside, then checks the dark with night goggles.
5.The villain blasts bubbles to distract everyone, then uses a sound booster to listen.
6.The villain shoots a sticky rope to climb up, then looks at a radar watch for the time.
7.The villain fires a power grapple to swing inside, then points a laser pointer to find the lock.
8.The villain uses a jet pack to fly over the wall, then points a laser pointer to find the lock.
9.The villain shoots a sticky rope to climb up, then flies a mini drone to spot the egg.
10.The villain throws a mega net over the gate, then points a laser pointer to find the lock.
11.The villain uses a jet pack to fly over the wall, then looks at a radar watch for the time.
12.The villain uses a jet pack to fly over the wall, then checks the dark with night goggles.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Dinosaur Island Rescue
Culprit: Cole (Power Grapple · Radar Watch · Right Handed · Red Helmet · Banana Peel)
- Clue 1 (Fractions of a number): "THE SNATCHER DOES NOT USE A MINI DRONE"3/8 of 40 = 15 (T) · 2/4 of 70 = 35 (R) · 1/10 of 180 = 18 (A) · 2/4 of 50 = 25 (D) · 2/6 of 42 = 14 (E) · 1/4 of 152 = 38 (H) · 8/10 of 50 = 40 (U) · 3/4 of 4 = 3 (C) · 3/5 of 45 = 27 (S) · 4/8 of 4 = 2 (O) · 5/10 of 14 = 7 (N) · 1/6 of 72 = 12 (I) · 1/8 of 168 = 21 (M)
- Clue 2 (Order of operations): "THE SNATCHER USED THEIR RIGHT HAND TO GRAB IT"52 + 6 × 3 = 70 (T) · 5 × 12 - 1 = 59 (R) · 12 × 7 - 24 = 60 (U) · 11 × 7 - 1 = 76 (D) · 10 × 7 - 2 = 68 (B) · 1 + 3 × 6 = 19 (E) · 33 + 3 × 2 = 39 (S) · 16 + 8 × 3 = 40 (N) · 10 + 6 × 2 = 22 (G) · 7 × 5 - 6 = 29 (C) · 3 + 2 × 2 = 7 (H) · 8 × 12 - 29 = 67 (O) · 26 + 3 × 8 = 50 (A) · 8 × 6 - 13 = 35 (I)
- Clue 3 (Multiplication facts (1-12)): "THE SNATCHER SLIPS UPON A BANANA PEEL"1 × 9 = 9 (T) · 9 × 10 = 90 (A) · 2 × 1 = 2 (B) · 12 × 7 = 84 (E) · 10 × 12 = 120 (S) · 7 × 11 = 77 (L) · 4 × 5 = 20 (O) · 2 × 3 = 6 (R) · 5 × 2 = 10 (I) · 12 × 12 = 144 (U) · 12 × 11 = 132 (N) · 5 × 9 = 45 (H) · 7 × 1 = 7 (C) · 8 × 7 = 56 (P)
- Clue 4 (Rounding): "WE FOUND A RED HELMET STRAP AT THE SCENE"Round 132 to the nearest ten = 130 (W) · Round 1,707 to the nearest thousand = 2000 (F) · Round 4,261 to the nearest hundred = 4300 (O) · Round 3,094 to the nearest thousand = 3000 (E) · Round 294 to the nearest ten = 290 (H) · Round 1,348 to the nearest hundred = 1300 (C) · Round 7,048 to the nearest thousand = 7000 (P) · Round 172 to the nearest ten = 170 (R) · Round 29 to the nearest ten = 30 (S) · Round 5,171 to the nearest thousand = 5000 (A) · Round 74 to the nearest ten = 70 (L) · Round 2,274 to the nearest hundred = 2300 (N) · Round 493 to the nearest hundred = 500 (T) · Round 2,902 to the nearest hundred = 2900 (M) · Round 23 to the nearest ten = 20 (U) · Round 1,698 to the nearest hundred = 1700 (D)
- Clue 5 (Division facts (1-12)): surviving statement (box 2) → Cole55 ÷ 11 = 5 · 56 ÷ 8 = 7 · 12 ÷ 4 = 3 · 8 ÷ 8 = 1 · 33 ÷ 3 = 11 · 48 ÷ 8 = 6 · 32 ÷ 4 = 8 · 108 ÷ 9 = 12 · 40 ÷ 10 = 4 · 80 ÷ 8 = 10 · 63 ÷ 7 = 9
About this mystery
- Grade level
- Grade 5 math
- Math topics
- Fractions of a number, Order of operations, Multiplication, Rounding, Division
- Reading level
- grades 1-2
- Theme
- The Dinosaur Island Rescue — set in the sunny trails of Dino Island
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects