🦕 DinosaursGrade 4Reading: grades 3-4RoundingAdditionSubtractionMultiplicationDivision
Case of the Missing Egg Keeper
Someone snuck into Thunder Valley last night and carried off the Egg Keeper, the ranger who guards the rarest dino eggs. Big three-toed tracks lead away from the nest, and a torn map flutters in the mud. It's up to you to find which dino 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 | Dino Kind | Special Trick | Crest | Scale Color | Weak Spot |
|---|---|---|---|---|---|
| Razor | Pteranodon | climbs tall cliffs | horned crest | green scales | bright lights |
| Spike | Raptor | sneaks in silence | smooth crest | green scales | loud thunder |
| Swoop | Pteranodon | digs deep tunnels | smooth crest | red scales | bright lights |
| Maple | Triceratops | leaps over fences | smooth crest | red scales | cold mud |
| Dakota | Raptor | swims fast rivers | horned crest | red scales | bright lights |
| Glider | Stegosaurus | digs deep tunnels | horned crest | red scales | cold mud |
| Roary | Raptor | leaps over fences | horned crest | brown scales | bright lights |
| Talon | Triceratops | digs deep tunnels | smooth crest | green scales | bright lights |
| Bronson | Raptor | climbs tall cliffs | smooth crest | brown scales | loud thunder |
| Bramble | T-Rex | digs deep tunnels | horned crest | red scales | bright lights |
| Clawdia | Raptor | swims fast rivers | smooth crest | red scales | bright lights |
| Gnasher | Raptor | swims fast rivers | horned crest | green scales | loud thunder |
| Petra | Triceratops | climbs tall cliffs | horned crest | green scales | loud thunder |
| Dustin | Pteranodon | sneaks in silence | smooth crest | red scales | bright lights |
| Pebbles | Pteranodon | climbs tall cliffs | horned crest | brown scales | loud thunder |
| Chomper | Triceratops | leaps over fences | smooth crest | red scales | bright lights |
| Maizie | Triceratops | swims fast rivers | smooth crest | brown scales | bright lights |
| Cricket | Pteranodon | swims fast rivers | horned crest | brown scales | cold mud |
| Rexford | T-Rex | climbs tall cliffs | smooth crest | red scales | loud thunder |
| Ferny | Stegosaurus | swims fast rivers | smooth crest | green scales | bright lights |
| Thorn | Stegosaurus | digs deep tunnels | smooth crest | red scales | bright lights |
Clue 1
Rounding
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
28000
200000
2000
300
280000
1400000
T
28000
50
200000
2000
310
50
1400000
280000
280000
500
T
28000
300
140000
1400
20000
470
1400000
300
T
28000
310
1400
280
2000
310
300
Round 28,173 to the nearest thousandT
Round 206,140 to the nearest hundred thousandH
Round 2,006 to the nearest thousandE
Round 295 to the nearest hundredS
Round 282,512 to the nearest ten thousandN
Round 1,412,987 to the nearest hundred thousandA
Round 48 to the nearest tenC
Round 310 to the nearest tenR
Round 465 to the nearest hundredO
Round 141,635 to the nearest ten thousandW
Round 1,432 to the nearest hundredI
Round 17,000 to the nearest ten thousandM
Round 471 to the nearest tenF
Round 281 to the nearest tenV
0/14 letters found
Clue 2
Addition
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
3359
5910
3638
2784
3125
3422
4537
4537
4537
A
3359
5910
A
3359
4537
5802
9506
9506
2784
5323
3410
8531
3422
4537
2784
3638
3125
2784
5323
3422
5043
A
3359
8531
6724
1895 + 1464 =A
2613 + 3297 =W
1829 + 1809 =I
1347 + 1437 =T
1560 + 1565 =N
1868 + 1554 =E
3144 + 1393 =S
3358 + 2444 =M
4691 + 4815 =O
3197 + 2126 =H
1335 + 2075 =C
4892 + 3639 =R
2249 + 2794 =D
2583 + 4141 =K
0/14 letters found
Clue 3
Subtraction
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
3610
3056
4030
3178
4030
4030
1498
4030
6884
1116
4250
7965
4056
8178
4030
8178
7965
T
3610
4017
7965
T
3610
3056
1116
6884
7965
3110
3056
T
3610
4250
7965
3110
3056
T
3610
8515
7645 - 4035 =T
5975 - 2919 =H
7033 - 3003 =E
7360 - 4182 =K
3337 - 1839 =P
11526 - 4642 =R
2453 - 1337 =B
7492 - 3242 =L
12668 - 4703 =I
8921 - 4865 =N
9094 - 916 =D
8740 - 4723 =W
5891 - 2781 =G
10807 - 2292 =S
0/14 letters found
Clue 4
Multiplication facts (1–12)
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
50
15
7
45
120
35
A
50
3
7
3
A
50
18
88
7
120
4
45
7
60
28
7
25
7
120
60
10 × 5 =A
3 × 5 =R
7 × 1 =E
5 × 9 =D
12 × 10 =S
7 × 5 =C
1 × 3 =L
6 × 3 =Y
11 × 8 =B
4 × 1 =I
10 × 6 =T
7 × 4 =H
5 × 5 =N
0/13 letters found
Clue 5
Division facts (1–12) — the last clue
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
8 ÷ 2 = ?
25 ÷ 5 = ?
24 ÷ 12 = ?
30 ÷ 10 = ?
90 ÷ 9 = ?
110 ÷ 10 = ?
21 ÷ 3 = ?
108 ÷ 9 = ?
99 ÷ 11 = ?
4 ÷ 4 = ?
72 ÷ 12 = ?
Step 2 — cross out the sentence with each answer
1.The villain stomps up to the nest, then swims fast rivers.
2.The villain glides down from above, then sneaks in silence.
3.The villain stomps up to the nest, then digs deep tunnels.
4.The villain charges through the gate, then leaps over fences.
5.The villain swings its spiked tail, then digs deep tunnels.
6.The villain darts past the guards, then digs deep tunnels.
7.The villain stomps up to the nest, then leaps over fences.
8.The villain glides down from above, then digs deep tunnels.
9.The villain glides down from above, then climbs tall cliffs.
10.The villain charges through the gate, then climbs tall cliffs.
11.The villain swings its spiked tail, then swims fast rivers.
12.The villain swings its spiked tail, then sneaks in silence.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — Case of the Missing Egg Keeper
Culprit: Swoop (Pteranodon · digs deep tunnels · smooth crest · red scales · bright lights)
- Clue 1 (Rounding): "THE SNATCHER CANNOT SWIM FAST RIVERS"Round 28,173 to the nearest thousand = 28000 (T) · Round 206,140 to the nearest hundred thousand = 200000 (H) · Round 2,006 to the nearest thousand = 2000 (E) · Round 295 to the nearest hundred = 300 (S) · Round 282,512 to the nearest ten thousand = 280000 (N) · Round 1,412,987 to the nearest hundred thousand = 1400000 (A) · Round 48 to the nearest ten = 50 (C) · Round 310 to the nearest ten = 310 (R) · Round 465 to the nearest hundred = 500 (O) · Round 141,635 to the nearest ten thousand = 140000 (W) · Round 1,432 to the nearest hundred = 1400 (I) · Round 17,000 to the nearest ten thousand = 20000 (M) · Round 471 to the nearest ten = 470 (F) · Round 281 to the nearest ten = 280 (V)
- Clue 2 (Addition): "A WITNESS SAW A SMOOTH CREST IN THE DARK"1895 + 1464 = 3359 (A) · 2613 + 3297 = 5910 (W) · 1829 + 1809 = 3638 (I) · 1347 + 1437 = 2784 (T) · 1560 + 1565 = 3125 (N) · 1868 + 1554 = 3422 (E) · 3144 + 1393 = 4537 (S) · 3358 + 2444 = 5802 (M) · 4691 + 4815 = 9506 (O) · 3197 + 2126 = 5323 (H) · 1335 + 2075 = 3410 (C) · 4892 + 3639 = 8531 (R) · 2249 + 2794 = 5043 (D) · 2583 + 4141 = 6724 (K)
- Clue 3 (Subtraction): "THE KEEPER BLINDED IT WITH BRIGHT LIGHTS"7645 - 4035 = 3610 (T) · 5975 - 2919 = 3056 (H) · 7033 - 3003 = 4030 (E) · 7360 - 4182 = 3178 (K) · 3337 - 1839 = 1498 (P) · 11526 - 4642 = 6884 (R) · 2453 - 1337 = 1116 (B) · 7492 - 3242 = 4250 (L) · 12668 - 4703 = 7965 (I) · 8921 - 4865 = 4056 (N) · 9094 - 916 = 8178 (D) · 8740 - 4723 = 4017 (W) · 5891 - 2781 = 3110 (G) · 10807 - 2292 = 8515 (S)
- Clue 4 (Multiplication facts (1–12)): "A RED SCALE LAY BESIDE THE NEST"10 × 5 = 50 (A) · 3 × 5 = 15 (R) · 7 × 1 = 7 (E) · 5 × 9 = 45 (D) · 12 × 10 = 120 (S) · 7 × 5 = 35 (C) · 1 × 3 = 3 (L) · 6 × 3 = 18 (Y) · 11 × 8 = 88 (B) · 4 × 1 = 4 (I) · 10 × 6 = 60 (T) · 7 × 4 = 28 (H) · 5 × 5 = 25 (N)
- Clue 5 (Division facts (1–12)): surviving statement (box 8) → Swoop8 ÷ 2 = 4 · 25 ÷ 5 = 5 · 24 ÷ 12 = 2 · 30 ÷ 10 = 3 · 90 ÷ 9 = 10 · 110 ÷ 10 = 11 · 21 ÷ 3 = 7 · 108 ÷ 9 = 12 · 99 ÷ 11 = 9 · 4 ÷ 4 = 1 · 72 ÷ 12 = 6
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Rounding, Addition, Subtraction, Multiplication, Division
- Reading level
- grades 3-4
- Theme
- Case of the Missing Egg Keeper — set in the Thunder Valley Dino Park
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects