🦕 DinosaursGrade 5Reading: grades 5-6AdditionSubtractionMultiplicationFractions of a numberDivision

Mystery at Cretacia Park

Someone broke into the Cretacia Park research lab and snatched the rare golden Amber Skull! Work through the clues and 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	Specialty	Tool	Dominant Hand	Hairstyle	Weakness
Paul Barrett	FOSSIL DIGGING	NIGHT VISOR	RIGHT HANDED	MUDDY SPIKES	SMELLY BAIT
Rodolfo Coria	TRICERATOPS TAME	SONIC WHISTLE	LEFT HANDED	FOSSIL BRAID	LOUD AIRHORN
Angela Milner	TRICERATOPS TAME	STUN BATON	LEFT HANDED	FOSSIL BRAID	SMELLY BAIT
Ian Malcolm	FLYING REPTILE	SONIC WHISTLE	LEFT HANDED	MUDDY SPIKES	BRIGHT FLARE
Othniel Marsh	FLYING REPTILE	STUN BATON	LEFT HANDED	FOSSIL BRAID	SMELLY BAIT
Robert Bakker	FLYING REPTILE	STUN BATON	RIGHT HANDED	MUDDY SPIKES	BRIGHT FLARE
Dong Zhiming	REX TRACKING	SONIC WHISTLE	LEFT HANDED	MUDDY SPIKES	BRIGHT FLARE
Patricia Vickers	FLYING REPTILE	NET LAUNCHER	RIGHT HANDED	MUDDY SPIKES	BRIGHT FLARE
Ellie Sattler	RAPTOR CONTROL	LASER POINTER	LEFT HANDED	MUDDY SPIKES	BRIGHT FLARE
Nizar Ibrahim	FOSSIL DIGGING	SONIC WHISTLE	LEFT HANDED	FOSSIL BRAID	BRIGHT FLARE
Paul Sereno	RAPTOR CONTROL	STUN BATON	RIGHT HANDED	MUDDY SPIKES	BRIGHT FLARE
Mary Anning	TRICERATOPS TAME	SONIC WHISTLE	RIGHT HANDED	BUZZ CUT	BRIGHT FLARE
Kenneth Carpenter	FOSSIL DIGGING	NET LAUNCHER	LEFT HANDED	MUDDY SPIKES	SMELLY BAIT
Jack Horner	RAPTOR CONTROL	NIGHT VISOR	LEFT HANDED	MUDDY SPIKES	BRIGHT FLARE
Barnum Brown	FOSSIL DIGGING	LASER POINTER	LEFT HANDED	MUDDY SPIKES	SMELLY BAIT
Alan Grant	FLYING REPTILE	STUN BATON	LEFT HANDED	MUDDY SPIKES	LOUD AIRHORN
Phil Currie	REX TRACKING	NIGHT VISOR	LEFT HANDED	FOSSIL BRAID	LOUD AIRHORN
Xu Xing	REX TRACKING	SONIC WHISTLE	LEFT HANDED	FOSSIL BRAID	LOUD AIRHORN
Lindsay Zanno	REX TRACKING	NET LAUNCHER	LEFT HANDED	MUDDY SPIKES	BRIGHT FLARE
Karen Chin	FOSSIL DIGGING	LASER POINTER	LEFT HANDED	FOSSIL BRAID	BRIGHT FLARE
Steve Brusatte	RAPTOR CONTROL	SONIC WHISTLE	RIGHT HANDED	FOSSIL BRAID	LOUD AIRHORN

Clue 1

Addition

Ranger Sam tallied up all the damaged fossil crates in both storage barns to gather early evidence.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

4277

7541

6047

9860

7093

9860

2661

6047

6426

4277

2624

3799

6047

9860

2190

3799

4277

7093

9860

6047

2190

7523

5116

7541

4277

4407

7523

9860

3799

2803

2341 + 1936 =T

5020 + 2521 =H

2935 + 3491 =C

2175 + 2941 =G

1098 + 1705 =R

1224 + 1400 =D

2866 + 1541 =V

926 + 1735 =P

1963 + 4084 =E

714 + 1476 =N

4064 + 3459 =I

2817 + 4276 =U

6463 + 3397 =S

2315 + 1484 =O

0/14 letters found

Clue 2

Subtraction

To figure out how many raptor claws are missing, Dr. Ellie subtracted the remaining inventory from yesterday's total.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

1760

2179

2128

7545

7639

2825

8487

2128

7576

1642

7423

5861

8487

1979

7423

5861

7814

2825

1642

3092

2128

2179

2128

1979

7423

1642

7423

1760

2128

4767 - 3007 =F

6323 - 4681 =L

6812 - 951 =A

7587 - 4762 =I

9475 - 2052 =E

4197 - 2218 =H

5393 - 2301 =Y

8729 - 1184 =P

3457 - 1278 =O

9081 - 594 =N

5092 - 2964 =T

9300 - 1661 =R

11181 - 3367 =V

10110 - 2534 =S

0/14 letters found

Clue 3

Multiplication facts (1-12)

The tracking team calculates the search grid area by multiplying the rows of dig sites by the columns.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

108

1 × 1 =A

3 × 5 =S

9 × 7 =W

2 × 7 =G

8 × 10 =R

3 × 10 =B

6 × 6 =E

1 × 4 =I

3 × 11 =Y

9 × 1 =H

3 × 2 =F

9 × 12 =L

11 × 1 =C

4 × 12 =T

0/14 letters found

Clue 4

Fractions of a number

The paleontology team analyzed a fraction of the soil samples from the quarry to narrow down the footprint trail.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

1/5 of 35 =F

1/4 of 76 =T

1/8 of 136 =A

3/6 of 58 =M

1/10 of 80 =S

2/5 of 85 =R

2/4 of 30 =E

2/6 of 75 =Y

1/5 of 30 =P

3/6 of 78 =H

1/6 of 198 =K

1/10 of 130 =N

6/8 of 12 =O

4/6 of 21 =C

2/4 of 22 =U

1/2 of 56 =D

1/4 of 108 =I

0/17 letters found

Clue 5

Division facts (1-12) — the last clue

The security crew divided the perimeter patrol duties evenly among all available park rangers.

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

80 ÷ 10 = ?

18 ÷ 2 = ?

30 ÷ 10 = ?

56 ÷ 8 = ?

55 ÷ 11 = ?

60 ÷ 5 = ?

22 ÷ 11 = ?

7 ÷ 7 = ?

66 ÷ 11 = ?

120 ÷ 12 = ?

66 ÷ 6 = ?

Step 2 — cross out the sentence with each answer

1.The villain tamed a wild raptor, then charged a high power stun baton.

2.The villain tracked a roaring rex, then flashed a red laser pointer.

3.The villain tracked a roaring rex, then fired a heavy net launcher.

4.The villain tracked a roaring rex, then blew a loud sonic whistle.

5.The villain tracked a roaring rex, then charged a high power stun baton.

6.The villain steered a heavy triceratops, then scouted with night visor.

7.The villain dug up a rare fossil, then flashed a red laser pointer.

8.The villain soared with a pterodactyl, then blew a loud sonic whistle.

9.The villain tamed a wild raptor, then flashed a red laser pointer.

10.The villain tamed a wild raptor, then scouted with night visor.

11.The villain dug up a rare fossil, then blew a loud sonic whistle.

12.The villain steered a heavy triceratops, then fired a heavy net launcher.

Solve it

Name the culprit

Choose the one suspect left standing.

Answer Key — Mystery at Cretacia Park

Culprit: Dong Zhiming (REX TRACKING · SONIC WHISTLE · LEFT HANDED · MUDDY SPIKES · BRIGHT FLARE)

Clue 1 (Addition): "THE SUSPECT DOES NOT USE NIGHT VISOR"
2341 + 1936 = 4277 (T) · 5020 + 2521 = 7541 (H) · 2935 + 3491 = 6426 (C) · 2175 + 2941 = 5116 (G) · 1098 + 1705 = 2803 (R) · 1224 + 1400 = 2624 (D) · 2866 + 1541 = 4407 (V) · 926 + 1735 = 2661 (P) · 1963 + 4084 = 6047 (E) · 714 + 1476 = 2190 (N) · 4064 + 3459 = 7523 (I) · 2817 + 4276 = 7093 (U) · 6463 + 3397 = 9860 (S) · 2315 + 1484 = 3799 (O)
Clue 2 (Subtraction): "FOOTPRINTS LEAN HEAVILY TO THE LEFT"
4767 - 3007 = 1760 (F) · 6323 - 4681 = 1642 (L) · 6812 - 951 = 5861 (A) · 7587 - 4762 = 2825 (I) · 9475 - 2052 = 7423 (E) · 4197 - 2218 = 1979 (H) · 5393 - 2301 = 3092 (Y) · 8729 - 1184 = 7545 (P) · 3457 - 1278 = 2179 (O) · 9081 - 594 = 8487 (N) · 5092 - 2964 = 2128 (T) · 9300 - 1661 = 7639 (R) · 11181 - 3367 = 7814 (V) · 10110 - 2534 = 7576 (S)
Clue 3 (Multiplication facts (1-12)): "A BRIGHT FLARE SCARES THE BEAST AWAY"
1 × 1 = 1 (A) · 3 × 5 = 15 (S) · 9 × 7 = 63 (W) · 2 × 7 = 14 (G) · 8 × 10 = 80 (R) · 3 × 10 = 30 (B) · 6 × 6 = 36 (E) · 1 × 4 = 4 (I) · 3 × 11 = 33 (Y) · 9 × 1 = 9 (H) · 3 × 2 = 6 (F) · 9 × 12 = 108 (L) · 11 × 1 = 11 (C) · 4 × 12 = 48 (T)
Clue 4 (Fractions of a number): "FOUND MUDDY SPIKES HAIR AT THE SCENE"
1/5 of 35 = 7 (F) · 1/4 of 76 = 19 (T) · 1/8 of 136 = 17 (A) · 3/6 of 58 = 29 (M) · 1/10 of 80 = 8 (S) · 2/5 of 85 = 34 (R) · 2/4 of 30 = 15 (E) · 2/6 of 75 = 25 (Y) · 1/5 of 30 = 6 (P) · 3/6 of 78 = 39 (H) · 1/6 of 198 = 33 (K) · 1/10 of 130 = 13 (N) · 6/8 of 12 = 9 (O) · 4/6 of 21 = 14 (C) · 2/4 of 22 = 11 (U) · 1/2 of 56 = 28 (D) · 1/4 of 108 = 27 (I)
Clue 5 (Division facts (1-12)): surviving statement (box 4) → Dong Zhiming
80 ÷ 10 = 8 · 18 ÷ 2 = 9 · 30 ÷ 10 = 3 · 56 ÷ 8 = 7 · 55 ÷ 11 = 5 · 60 ÷ 5 = 12 · 22 ÷ 11 = 2 · 7 ÷ 7 = 1 · 66 ÷ 11 = 6 · 120 ÷ 12 = 10 · 66 ÷ 6 = 11

About this mystery

Grade level: Grade 5 math
Math topics: Addition, Subtraction, Multiplication, Fractions of a number, Division
Reading level: grades 5-6
Theme: Mystery at Cretacia Park — set in Cretacia Fossil Park
Format: Interactive online & printable worksheet with answer key
Solution: One unique, verified culprit among 21 suspects

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