⚽ Roblox, Mermaids, Unicorns, Grade 3Reading: grades 3-4Place valueSkip countingFractions of a numberRounding
The Mystery of the Rainbow Reef Trophy
Someone snuck into the locker room during the big championship game and snatched the Golden Catnip Trophy! Coach Whiskers needs your math skills to find out which player did it before the final whistle sounds.
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 | Soccer Move | Roblox Gear | Dominant Hand | Trait | Weakness |
|---|---|---|---|---|---|
| Coral Chloe | Bubble Dash | Teleport Spin | Left Handed | Silver Fur | Catnip Spray |
| Starlet Siren | Rainbow Pass | Teleport Spin | Right Handed | Aqua Tail | Glitter Net |
| Fluffy Felix | Paw Tackle | Mega Bounce | Right Handed | Pink Mane | Catnip Spray |
| Purrfect Pete | Paw Tackle | Teleport Spin | Left Handed | Pink Mane | Magic Whistle |
| Sam Kerr | Horn Blast | Speed Boost | Left Handed | Pink Mane | Catnip Spray |
| Mane Manny | Rainbow Pass | Teleport Spin | Left Handed | Pink Mane | Catnip Spray |
| Kitten Kit | Paw Tackle | Neon Glow | Left Handed | Aqua Tail | Magic Whistle |
| Alex Morgan | Bubble Dash | Speed Boost | Left Handed | Silver Fur | Glitter Net |
| Mia Hamm | Rainbow Pass | Shield Blast | Right Handed | Pink Mane | Magic Whistle |
| Sparkle Sam | Bubble Dash | Mega Bounce | Left Handed | Pink Mane | Magic Whistle |
| Paw Patty | Sparkle Kick | Teleport Spin | Right Handed | Pink Mane | Catnip Spray |
| Mermaid Mia | Horn Blast | Teleport Spin | Right Handed | Aqua Tail | Glitter Net |
| Lionel Messi | Rainbow Pass | Shield Blast | Left Handed | Pink Mane | Catnip Spray |
| Marta | Sparkle Kick | Neon Glow | Left Handed | Pink Mane | Magic Whistle |
| Pele | Sparkle Kick | Teleport Spin | Left Handed | Pink Mane | Catnip Spray |
| Misty Tail | Paw Tackle | Neon Glow | Right Handed | Silver Fur | Magic Whistle |
| Finny Frank | Horn Blast | Mega Bounce | Left Handed | Silver Fur | Catnip Spray |
| Captain Sparkles | Sparkle Kick | Shield Blast | Right Handed | Pink Mane | Magic Whistle |
| Cristiano Ronaldo | Horn Blast | Speed Boost | Right Handed | Pink Mane | Magic Whistle |
| Whiskers Will | Paw Tackle | Neon Glow | Left Handed | Pink Mane | Catnip Spray |
| Unicorn Uma | Rainbow Pass | Speed Boost | Left Handed | Silver Fur | Catnip Spray |
Clue 1
Place value
Coach Whiskers checked the digital scoreboard in Blox World. Looking at the digit values gave a clue about the culprit.
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
8000
1000
40
600
300
40
80
6000
900
600
T
8000
70
7000
6000
40
70
3000
50
40
600
300
50
T
8000
5000
600
40
300
40
50
300
9000
60
50
100
What is the value of the 8 in 8,179?T
What is the value of the 1 in 3,195?W
What is the value of the 5 in 5,303?U
What is the value of the 8 in 986?A
What is the value of the 1 in 41,946?H
What is the value of the 3 in 83,008?D
What is the value of the 9 in 9,078?G
What is the value of the 5 in 7,259?O
What is the value of the 7 in 17,286?I
What is the value of the 3 in 370?N
What is the value of the 6 in 3,761?L
What is the value of the 6 in 5,679?S
What is the value of the 9 in 914?Y
What is the value of the 4 in 746?E
What is the value of the 7 in 378?R
What is the value of the 6 in 6,433?K
0/16 letters found
Clue 2
Skip counting
The detective counted footprints in equal skips along the unicorn pitch to track where the thief ran.
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
40
22
39
45
90
65
65
65
36
W
40
36
130
90
70
39
24
36
45
14
90
14
12
22
80
12
36
39
27
110
36
130
Skip-count by 10s. Fill the blank: 10, 20, 30, ___, 50, 60W
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, ___, 16, 18D
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, ___, 39, 42A
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, ___, 27, 30H
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110E
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, ___, 140, 150L
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130O
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, ___, 24, 26I
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55N
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, ___, 42, 45T
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, ___, 90, 100C
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33G
Skip-count by 3s. Fill the blank: 3, 6, 9, ___, 15, 18K
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, ___, 70, 75S
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, ___, 75, 80F
0/15 letters found
Clue 3
Fractions of a number
Mermaid Mia divided the supply of magic potions into equal groups to see how many were taken.
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
19
8
28
8
6
8
37
28
8
25
4
30
8
28
36
13
T
40
37
24
29
30
29
25
13
26
T
40
12
30
T
40
12
29
T
40
19
8
11
2/10 of 200 =T
3/8 of 80 =S
5/10 of 50 =R
1/3 of 108 =C
2/6 of 111 =N
1/2 of 38 =H
2/4 of 8 =U
4/8 of 58 =P
2/8 of 24 =F
4/6 of 18 =O
1/6 of 168 =D
1/6 of 66 =M
1/4 of 32 =E
2/6 of 39 =A
4/6 of 39 =Y
4/10 of 60 =I
0/16 letters found
Clue 4
Rounding
The stadium radar scanner rounded the player speed to the nearest ten to pinpoint the suspect.
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
900
60
6000
8000
6000
T
900
6000
20
T
900
4000
50
6000
9000
700
3000
2000
8000
70
4000
2000
90
400
80
2000
6000
7000
T
900
800
80
2000
8000
7000
Round 906 to the nearest hundredT
Round 7,519 to the nearest thousandD
Round 4,029 to the nearest thousandI
Round 3,213 to the nearest thousandU
Round 6,146 to the nearest thousandE
Round 61 to the nearest tenH
Round 748 to the nearest hundredO
Round 2,497 to the nearest thousandN
Round 83 to the nearest tenA
Round 49 to the nearest tenV
Round 23 to the nearest tenC
Round 795 to the nearest hundredR
Round 357 to the nearest hundredM
Round 90 to the nearest tenK
Round 6,614 to the nearest thousandS
Round 9,161 to the nearest thousandF
Round 68 to the nearest tenP
0/17 letters found
Clue 5
Fractions of a number — the last clue
Captain Sparkles looked at a fraction of the glittery treats left behind on the field.
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
2/8 of 8 = ?
1/5 of 35 = ?
4/8 of 8 = ?
3/6 of 6 = ?
2/10 of 25 = ?
1/2 of 2 = ?
1/6 of 60 = ?
1/4 of 24 = ?
1/5 of 40 = ?
2/10 of 55 = ?
2/8 of 36 = ?
Step 2 — cross out the sentence with each answer
1.The villain blew a horn blast, then cast shield blast.
2.The villain made a rainbow pass, then used teleport spin.
3.The villain shot a sparkle kick, then activated neon glow.
4.The villain shot a sparkle kick, then used teleport spin.
5.The villain used bubble dash, then activated neon glow.
6.The villain tried a paw tackle, then cast shield blast.
7.The villain made a rainbow pass, then cast shield blast.
8.The villain blew a horn blast, then used teleport spin.
9.The villain shot a sparkle kick, then cast shield blast.
10.The villain shot a sparkle kick, then turned on speed boost.
11.The villain used bubble dash, then cast shield blast.
12.The villain blew a horn blast, then turned on speed boost.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Mystery of the Rainbow Reef Trophy
Culprit: Sam Kerr (Horn Blast · Speed Boost · Left Handed · Pink Mane · Catnip Spray)
- Clue 1 (Place value): "THE SNEAKY STRIKER DOES NOT USE NEON GLOW"What is the value of the 8 in 8,179? = 8000 (T) · What is the value of the 1 in 3,195? = 100 (W) · What is the value of the 5 in 5,303? = 5000 (U) · What is the value of the 8 in 986? = 80 (A) · What is the value of the 1 in 41,946? = 1000 (H) · What is the value of the 3 in 83,008? = 3000 (D) · What is the value of the 9 in 9,078? = 9000 (G) · What is the value of the 5 in 7,259? = 50 (O) · What is the value of the 7 in 17,286? = 7000 (I) · What is the value of the 3 in 370? = 300 (N) · What is the value of the 6 in 3,761? = 60 (L) · What is the value of the 6 in 5,679? = 600 (S) · What is the value of the 9 in 914? = 900 (Y) · What is the value of the 4 in 746? = 40 (E) · What is the value of the 7 in 378? = 70 (R) · What is the value of the 6 in 6,433? = 6000 (K)
- Clue 2 (Skip counting): "WITNESS SAW A LEFT HANDED KICK AT GOAL"Skip-count by 10s. Fill the blank: 10, 20, 30, ___, 50, 60 = 40 (W) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, ___, 16, 18 = 14 (D) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, ___, 39, 42 = 36 (A) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, ___, 27, 30 = 24 (H) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110 = 90 (E) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, ___, 140, 150 = 130 (L) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130 = 110 (O) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, ___, 24, 26 = 22 (I) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55 = 45 (N) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, ___, 42, 45 = 39 (T) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, ___, 90, 100 = 80 (C) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33 = 27 (G) · Skip-count by 3s. Fill the blank: 3, 6, 9, ___, 15, 18 = 12 (K) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, ___, 70, 75 = 65 (S) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, ___, 75, 80 = 70 (F)
- Clue 3 (Fractions of a number): "THE DEFENDER USED CATNIP SPRAY TO STOP THEM"2/10 of 200 = 40 (T) · 3/8 of 80 = 30 (S) · 5/10 of 50 = 25 (R) · 1/3 of 108 = 36 (C) · 2/6 of 111 = 37 (N) · 1/2 of 38 = 19 (H) · 2/4 of 8 = 4 (U) · 4/8 of 58 = 29 (P) · 2/8 of 24 = 6 (F) · 4/6 of 18 = 12 (O) · 1/6 of 168 = 28 (D) · 1/6 of 66 = 11 (M) · 1/4 of 32 = 8 (E) · 2/6 of 39 = 13 (A) · 4/6 of 39 = 26 (Y) · 4/10 of 60 = 24 (I)
- Clue 4 (Rounding): "THE DETECTIVE FOUND PINK MANE STRANDS"Round 906 to the nearest hundred = 900 (T) · Round 7,519 to the nearest thousand = 8000 (D) · Round 4,029 to the nearest thousand = 4000 (I) · Round 3,213 to the nearest thousand = 3000 (U) · Round 6,146 to the nearest thousand = 6000 (E) · Round 61 to the nearest ten = 60 (H) · Round 748 to the nearest hundred = 700 (O) · Round 2,497 to the nearest thousand = 2000 (N) · Round 83 to the nearest ten = 80 (A) · Round 49 to the nearest ten = 50 (V) · Round 23 to the nearest ten = 20 (C) · Round 795 to the nearest hundred = 800 (R) · Round 357 to the nearest hundred = 400 (M) · Round 90 to the nearest ten = 90 (K) · Round 6,614 to the nearest thousand = 7000 (S) · Round 9,161 to the nearest thousand = 9000 (F) · Round 68 to the nearest ten = 70 (P)
- Clue 5 (Fractions of a number): surviving statement (box 12) → Sam Kerr2/8 of 8 = 2 · 1/5 of 35 = 7 · 4/8 of 8 = 4 · 3/6 of 6 = 3 · 2/10 of 25 = 5 · 1/2 of 2 = 1 · 1/6 of 60 = 10 · 1/4 of 24 = 6 · 1/5 of 40 = 8 · 2/10 of 55 = 11 · 2/8 of 36 = 9
About this mystery
- Grade level
- Grade 3 math
- Math topics
- Place value, Skip counting, Fractions of a number, Rounding
- Reading level
- grades 3-4
- Theme
- The Mystery of the Rainbow Reef Trophy — set in Rainbow Reef Soccer Stadium in Blox World
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects