🔎 Axolotl‘sGrade 4Reading: grades 3-4MultiplicationSkip countingRoundingAdditionDivision
The Mystery of the Golden Bloodworm
Someone snuck into the Muddy Lagoon Sanctuary and snatched the legendary Golden Bloodworm prize! Solve the math clues to uncover which axolotl committed the watery crime.
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 | Trick | Gear | Habit | Gill Style | Fear |
|---|---|---|---|---|---|
| Splash | Mud Dash | Star Fin | Left Gill Twitch | Feathery Gills | Ice Cube |
| Bubbles | Mud Dash | Worm Whistle | Right Gill Twitch | Smooth Head | Bright Flash |
| Ripple | Glow Spots | Moss Armor | Left Gill Twitch | Smooth Head | Squeaky Toy |
| Fidget | Glow Spots | Star Fin | Right Gill Twitch | Smooth Head | Bright Flash |
| Noodle | Bubble Shield | Crystal Crown | Right Gill Twitch | Smooth Head | Bright Flash |
| Waddles | Pink Frills | Water Cannon | Right Gill Twitch | Spiky Crest | Squeaky Toy |
| Lotl | Pink Frills | Water Cannon | Right Gill Twitch | Feathery Gills | Ice Cube |
| Shelly | Mud Dash | Water Cannon | Left Gill Twitch | Spiky Crest | Ice Cube |
| Coral | Bubble Shield | Star Fin | Right Gill Twitch | Spiky Crest | Ice Cube |
| Ziggy | Pink Frills | Crystal Crown | Right Gill Twitch | Smooth Head | Ice Cube |
| Mossy | Glow Spots | Worm Whistle | Left Gill Twitch | Spiky Crest | Squeaky Toy |
| Gilly | Tail Whip | Worm Whistle | Left Gill Twitch | Smooth Head | Ice Cube |
| Muddy | Glow Spots | Moss Armor | Right Gill Twitch | Feathery Gills | Bright Flash |
| Sir Squiggles | Pink Frills | Water Cannon | Left Gill Twitch | Smooth Head | Bright Flash |
| Slick | Bubble Shield | Worm Whistle | Right Gill Twitch | Spiky Crest | Squeaky Toy |
| Pebble | Mud Dash | Water Cannon | Right Gill Twitch | Smooth Head | Bright Flash |
| Axel | Glow Spots | Crystal Crown | Right Gill Twitch | Feathery Gills | Bright Flash |
| Nibbles | Tail Whip | Worm Whistle | Left Gill Twitch | Spiky Crest | Ice Cube |
| Finley | Mud Dash | Water Cannon | Right Gill Twitch | Smooth Head | Ice Cube |
| Swirly | Pink Frills | Worm Whistle | Right Gill Twitch | Feathery Gills | Ice Cube |
| Pinky | Bubble Shield | Water Cannon | Right Gill Twitch | Smooth Head | Bright Flash |
Clue 1
Multiplication facts (1-12)
You find rows of glowing eggs tucked into water plants and multiply the groups to unlock the first safe.
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
35
54
7
45
44
36
36
63
44
3
9
22
7
121
3
22
T
35
4
121
7
63
144
22
77
14
144
54
44
121
T
35
36
7
7 × 5 =T
2 × 11 =O
4 × 11 =I
6 × 6 =L
7 × 11 =R
5 × 9 =V
7 × 1 =E
12 × 12 =W
1 × 4 =U
11 × 11 =S
3 × 1 =N
3 × 3 =D
9 × 6 =H
9 × 7 =A
2 × 7 =M
0/15 letters found
Clue 2
Skip counting
To track the slippery footsteps across the lakebed, you skip count along the trail of pebbles.
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
25
30
65
70
16
70
9
65
6
T
25
70
30
27
35
65
21
33
20
100
18
30
T
25
18
100
45
45
T
25
35
100
T
25
6
30
12
22
T
25
33
26
110
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, ___, 30, 35T
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20U
Skip-count by 10s. Fill the blank: 10, 20, ___, 40, 50H
Skip-count by 5s. Fill the blank: 5, 10, 15, ___, 25, 30R
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, ___, 80, 90S
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55L
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, ___, 24, 27D
Skip-count by 2s. Fill the blank: 2, 4, ___, 8, 10C
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, ___, 24, 26Y
Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15P
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, ___, 28, 30N
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, ___, 70, 75E
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, ___, 40, 45W
Skip-count by 3s. Fill the blank: 3, 6, 9, ___, 15, 18B
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130K
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, ___, 21, 24G
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33O
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39A
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, ___, 110, 120I
0/19 letters found
Clue 3
Rounding
The underwater sonar screen rounds the distance to the nearest ten to pinpoint the secret cavern.
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
370
130
430
700
170
4300
1300
30
2900
A
370
900
4300
290
30
2900
700
170
4300
1300
900
110
A
370
430
230
1700
1300
4300
230
900
20
900
90
230
110
1300
Round 372 to the nearest tenA
Round 92 to the nearest tenP
Round 430 to the nearest tenR
Round 1,291 to the nearest hundredT
Round 130 to the nearest tenB
Round 292 to the nearest tenO
Round 4,275 to the nearest hundredH
Round 19 to the nearest tenU
Round 29 to the nearest tenF
Round 172 to the nearest tenG
Round 231 to the nearest tenE
Round 2,926 to the nearest hundredL
Round 106 to the nearest tenC
Round 898 to the nearest hundredS
Round 748 to the nearest hundredI
Round 1,747 to the nearest hundredD
0/16 letters found
Clue 4
Addition
You combine all the floating worm treats found near the crime scene to total up the 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.
A
3274
7728
3974
4397
4397
4069
2930
2930
4715
A
3274
9147
2124
4715
2729
4069
3203
4397
2124
4397
4397
7728
4715
2091
4263
2124
2124
2729
4263
3382
4715
7366
7728
1822 + 1452 =A
2888 + 1509 =O
1428 + 663 =G
1372 + 1357 =F
3745 + 3621 =R
4580 + 4567 =D
1323 + 2746 =T
2142 + 2573 =E
1394 + 2580 =M
2602 + 1661 =I
1545 + 1837 =B
1820 + 1110 =H
1913 + 1290 =N
1123 + 1001 =L
4939 + 2789 =S
0/15 letters found
Clue 5
Division facts (1-12) — the last clue
To share the clues fairly among your detective squad, you divide the water samples into equal jars.
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
108 ÷ 9 = ?
30 ÷ 5 = ?
22 ÷ 2 = ?
80 ÷ 10 = ?
42 ÷ 6 = ?
4 ÷ 2 = ?
44 ÷ 11 = ?
36 ÷ 12 = ?
30 ÷ 3 = ?
45 ÷ 5 = ?
12 ÷ 12 = ?
Step 2 — cross out the sentence with each answer
1.The villain shimmered with glow spots, then blasted a water cannon.
2.The villain shimmered with glow spots, then blew a worm whistle.
3.The villain flashed pink frills, then showed off a star fin.
4.The villain shimmered with glow spots, then stole the crystal crown.
5.The villain raised a bubble shield, then stole the crystal crown.
6.The villain dashed through the mud, then blasted a water cannon.
7.The villain flashed pink frills, then blasted a water cannon.
8.The villain raised a bubble shield, then showed off a star fin.
9.The villain flashed pink frills, then wrapped in moss armor.
10.The villain raised a bubble shield, then blew a worm whistle.
11.The villain shimmered with glow spots, then showed off a star fin.
12.The villain raised a bubble shield, then blasted a water cannon.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Mystery of the Golden Bloodworm
Culprit: Noodle (Bubble Shield · Crystal Crown · Right Gill Twitch · Smooth Head · Bright Flash)
- Clue 1 (Multiplication facts (1-12)): "THE VILLAIN DOES NOT USE A WORM WHISTLE"7 × 5 = 35 (T) · 2 × 11 = 22 (O) · 4 × 11 = 44 (I) · 6 × 6 = 36 (L) · 7 × 11 = 77 (R) · 5 × 9 = 45 (V) · 7 × 1 = 7 (E) · 12 × 12 = 144 (W) · 1 × 4 = 4 (U) · 11 × 11 = 121 (S) · 3 × 1 = 3 (N) · 3 × 3 = 9 (D) · 9 × 6 = 54 (H) · 9 × 7 = 63 (A) · 2 × 7 = 14 (M)
- Clue 2 (Skip counting): "THE SUSPECT SHOWED A RIGHT GILL TWITCH BY TANK"Skip-count by 5s. Fill the blank: 5, 10, 15, 20, ___, 30, 35 = 25 (T) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20 = 16 (U) · Skip-count by 10s. Fill the blank: 10, 20, ___, 40, 50 = 30 (H) · Skip-count by 5s. Fill the blank: 5, 10, 15, ___, 25, 30 = 20 (R) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, ___, 80, 90 = 70 (S) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55 = 45 (L) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, ___, 24, 27 = 21 (D) · Skip-count by 2s. Fill the blank: 2, 4, ___, 8, 10 = 6 (C) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, ___, 24, 26 = 22 (Y) · Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15 = 9 (P) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, ___, 28, 30 = 26 (N) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, ___, 70, 75 = 65 (E) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, ___, 40, 45 = 35 (W) · Skip-count by 3s. Fill the blank: 3, 6, 9, ___, 15, 18 = 12 (B) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130 = 110 (K) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, ___, 21, 24 = 18 (G) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33 = 27 (O) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39 = 33 (A) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, ___, 110, 120 = 100 (I)
- Clue 3 (Rounding): "A BRIGHT FLASH OF LIGHT SCARED THE SUSPECT"Round 372 to the nearest ten = 370 (A) · Round 92 to the nearest ten = 90 (P) · Round 430 to the nearest ten = 430 (R) · Round 1,291 to the nearest hundred = 1300 (T) · Round 130 to the nearest ten = 130 (B) · Round 292 to the nearest ten = 290 (O) · Round 4,275 to the nearest hundred = 4300 (H) · Round 19 to the nearest ten = 20 (U) · Round 29 to the nearest ten = 30 (F) · Round 172 to the nearest ten = 170 (G) · Round 231 to the nearest ten = 230 (E) · Round 2,926 to the nearest hundred = 2900 (L) · Round 106 to the nearest ten = 110 (C) · Round 898 to the nearest hundred = 900 (S) · Round 748 to the nearest hundred = 700 (I) · Round 1,747 to the nearest hundred = 1700 (D)
- Clue 4 (Addition): "A SMOOTH HEAD LEFT NO LOOSE GILL FIBERS"1822 + 1452 = 3274 (A) · 2888 + 1509 = 4397 (O) · 1428 + 663 = 2091 (G) · 1372 + 1357 = 2729 (F) · 3745 + 3621 = 7366 (R) · 4580 + 4567 = 9147 (D) · 1323 + 2746 = 4069 (T) · 2142 + 2573 = 4715 (E) · 1394 + 2580 = 3974 (M) · 2602 + 1661 = 4263 (I) · 1545 + 1837 = 3382 (B) · 1820 + 1110 = 2930 (H) · 1913 + 1290 = 3203 (N) · 1123 + 1001 = 2124 (L) · 4939 + 2789 = 7728 (S)
- Clue 5 (Division facts (1-12)): surviving statement (box 5) → Noodle108 ÷ 9 = 12 · 30 ÷ 5 = 6 · 22 ÷ 2 = 11 · 80 ÷ 10 = 8 · 42 ÷ 6 = 7 · 4 ÷ 2 = 2 · 44 ÷ 11 = 4 · 36 ÷ 12 = 3 · 30 ÷ 3 = 10 · 45 ÷ 5 = 9 · 12 ÷ 12 = 1
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Multiplication, Skip counting, Rounding, Addition, Division
- Reading level
- grades 3-4
- Theme
- The Mystery of the Golden Bloodworm — set in The Muddy Lagoon Sanctuary
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects