🔎 E scooter and e bikesGrade 1Reading: grades 3-4AdditionSubtractionSkip countingPlace valueMissing addends
The Mystery of the Golden E-Scooter
Someone hacked the charging station at Volt City Park and zoomed off with the prototype Golden E-Scooter. Use your detective skills to decode the tracks and find out who snatched the ride.
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 | Deck Tech | Handlebar Gadget | Riding Stance | Hair Style | Mechanical Glitch |
|---|---|---|---|---|---|
| Owen Glide | Hydro Brake Deck | Loud Siren Horn | Left Foot Forward | Spiky Blue Hair | Squeaky Disc Brake |
| Eli Cable | Solar Battery Deck | Digital Speedo | Right Foot Forward | Curly Red Hair | Loose Chain Noise |
| Jax Sparks | Dual Motor Deck | Digital Speedo | Right Foot Forward | Spiky Blue Hair | Loose Chain Noise |
| Skye Fender | Hydro Brake Deck | Loud Siren Horn | Left Foot Forward | Curly Red Hair | Loose Chain Noise |
| Milo Gear | Neon Wheel Deck | Digital Speedo | Left Foot Forward | Curly Red Hair | Loose Chain Noise |
| Leo Pedal | Dual Motor Deck | Loud Siren Horn | Left Foot Forward | Spiky Blue Hair | Loose Chain Noise |
| Ivy Charger | Neon Wheel Deck | Cargo Storage Box | Right Foot Forward | Long Neon Braids | Loose Chain Noise |
| Zoe Volt | Dual Motor Deck | Digital Speedo | Right Foot Forward | Curly Red Hair | Squeaky Disc Brake |
| Ella Amp | Dual Motor Deck | GPS Map Screen | Right Foot Forward | Curly Red Hair | Low Battery Beep |
| Jade Pulse | Dual Motor Deck | GPS Map Screen | Left Foot Forward | Long Neon Braids | Low Battery Beep |
| Nora Shift | Solar Battery Deck | Laser Path Light | Right Foot Forward | Curly Red Hair | Squeaky Disc Brake |
| Liam Watt | Neon Wheel Deck | GPS Map Screen | Left Foot Forward | Spiky Blue Hair | Loose Chain Noise |
| Noah Circuit | Neon Wheel Deck | Loud Siren Horn | Left Foot Forward | Long Neon Braids | Loose Chain Noise |
| Aria Chain | Fat Tire Deck | Cargo Storage Box | Left Foot Forward | Spiky Blue Hair | Low Battery Beep |
| Tess Motor | Hydro Brake Deck | Loud Siren Horn | Left Foot Forward | Curly Red Hair | Squeaky Disc Brake |
| Chloe Hub | Hydro Brake Deck | Cargo Storage Box | Left Foot Forward | Curly Red Hair | Loose Chain Noise |
| Mia Sprocket | Fat Tire Deck | GPS Map Screen | Left Foot Forward | Spiky Blue Hair | Loose Chain Noise |
| Kai Tread | Solar Battery Deck | Digital Speedo | Left Foot Forward | Curly Red Hair | Loose Chain Noise |
| Caleb Drift | Hydro Brake Deck | Cargo Storage Box | Left Foot Forward | Long Neon Braids | Loose Chain Noise |
| Finn Rim | Neon Wheel Deck | Laser Path Light | Left Foot Forward | Curly Red Hair | Loose Chain Noise |
| Ruby Turbo | Fat Tire Deck | Laser Path Light | Left Foot Forward | Curly Red Hair | Squeaky Disc Brake |
Clue 1
Addition
You combine the spare battery packs in the workshop to power up your clue scanner.
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
13
8
5
4
20
4
15
5
18
T
13
6
7
5
4
19
7
T
13
8
14
3
5
9
7
20
6
4
10
11
5
19
8
7
11
19
5 + 8 =T
10 + 5 =P
6 + 2 =H
6 + 4 =I
3 + 2 =E
5 + 14 =N
6 + 14 =U
9 + 9 =C
2 + 1 =V
6 + 5 =R
3 + 4 =O
9 + 5 =A
4 + 2 =D
1 + 3 =S
2 + 7 =L
0/15 letters found
Clue 2
Subtraction
You count the missing helmets on the display rack 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.
W
4
12
14
10
17
16
16
16
7
W
4
11
17
2
14
2
1
1
14
2
1
6
W
4
7
6
5
1
10
14
15
17
5
17
13
3
11 - 7 =W
13 - 7 =R
6 - 5 =O
18 - 3 =H
17 - 3 =T
8 - 5 =K
7 - 2 =D
13 - 1 =I
18 - 1 =E
18 - 7 =L
14 - 4 =N
19 - 6 =C
17 - 1 =S
4 - 2 =F
16 - 9 =A
0/15 letters found
Clue 3
Skip counting
You count the scooter wheels stacked in rows of two along the garage wall.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
H
18
80
12
35
120
12
14
10
10
110
80
100
H
18
12
140
28
28
10
140
110
80
28
80
12
35
21
H
18
80
H
18
36
45
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, ___, 20, 22H
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, ___, 30, 32N
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, ___, 40, 45R
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, ___, 130, 140D
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, ___, 150, 160I
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55B
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, ___, 90, 100E
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, ___, 110, 120C
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, ___, 14, 16A
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, ___, 24, 27T
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14O
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, ___, 39, 42U
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, ___, 16, 18L
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130S
0/14 letters found
Clue 4
Place value
You read the digital numbers on a dropped speedometer screen to get a clue code.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
F
81
27
37
15
97
30
37
26
78
17
26
38
97
41
36
95
26
15
38
36
26
59
41
38
30
41
36
26
55
38
26
What number has 8 tens and 1 one?F
What number has 7 tens and 8 ones?L
What number has 1 ten and 5 ones?N
What number has 2 tens and 7 ones?O
What number has 3 tens and 8 ones?E
What number has 5 tens and 5 ones?G
What number has 3 tens and 6 ones?A
What number has 9 tens and 7 ones?D
What number has 5 tens and 9 ones?T
What number has 3 tens and 0 ones?C
What number has 1 ten and 7 ones?Y
What number has 2 tens and 6 ones?R
What number has 4 tens and 1 one?H
What number has 3 tens and 7 ones?U
What number has 9 tens and 5 ones?I
0/15 letters found
Clue 5
Missing addends — the last clue
You calculate how many extra charging cables are needed to fill the rack.
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
5 + ___ = 12
10 + ___ = 12
3 + ___ = 6
2 + ___ = 8
6 + ___ = 14
3 + ___ = 8
8 + ___ = 9
4 + ___ = 14
2 + ___ = 14
7 + ___ = 16
2 + ___ = 6
Step 2 — cross out the sentence with each answer
1.The villain rolled on the fat tire deck, then tapped the gps map screen.
2.The villain charged the solar battery deck, then checked the digital speedo.
3.The villain clamped the hydro brake deck, then latched a cargo storage box.
4.The villain charged the solar battery deck, then switched on a laser path light.
5.The villain revved up the dual motor deck, then honked with a loud siren horn.
6.The villain lit up the neon wheel deck, then tapped the gps map screen.
7.The villain lit up the neon wheel deck, then switched on a laser path light.
8.The villain revved up the dual motor deck, then tapped the gps map screen.
9.The villain revved up the dual motor deck, then switched on a laser path light.
10.The villain rolled on the fat tire deck, then honked with a loud siren horn.
11.The villain lit up the neon wheel deck, then checked the digital speedo.
12.The villain charged the solar battery deck, then latched a cargo storage box.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Mystery of the Golden E-Scooter
Culprit: Milo Gear (Neon Wheel Deck · Digital Speedo · Left Foot Forward · Curly Red Hair · Loose Chain Noise)
- Clue 1 (Addition): "THE SUSPECT DOES NOT HAVE LOUD SIREN HORN"5 + 8 = 13 (T) · 10 + 5 = 15 (P) · 6 + 2 = 8 (H) · 6 + 4 = 10 (I) · 3 + 2 = 5 (E) · 5 + 14 = 19 (N) · 6 + 14 = 20 (U) · 9 + 9 = 18 (C) · 2 + 1 = 3 (V) · 6 + 5 = 11 (R) · 3 + 4 = 7 (O) · 9 + 5 = 14 (A) · 4 + 2 = 6 (D) · 1 + 3 = 4 (S) · 2 + 7 = 9 (L)
- Clue 2 (Subtraction): "WITNESS SAW LEFT FOOT FORWARD ON THE DECK"11 - 7 = 4 (W) · 13 - 7 = 6 (R) · 6 - 5 = 1 (O) · 18 - 3 = 15 (H) · 17 - 3 = 14 (T) · 8 - 5 = 3 (K) · 7 - 2 = 5 (D) · 13 - 1 = 12 (I) · 18 - 1 = 17 (E) · 18 - 7 = 11 (L) · 14 - 4 = 10 (N) · 19 - 6 = 13 (C) · 17 - 1 = 16 (S) · 4 - 2 = 2 (F) · 16 - 9 = 7 (A)
- Clue 3 (Skip counting): "HEARD A LOOSE CHAIN NOISE NEAR THE HUB"Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, ___, 20, 22 = 18 (H) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, ___, 30, 32 = 28 (N) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, ___, 40, 45 = 35 (R) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, ___, 130, 140 = 120 (D) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, ___, 150, 160 = 140 (I) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55 = 45 (B) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, ___, 90, 100 = 80 (E) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, ___, 110, 120 = 100 (C) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, ___, 14, 16 = 12 (A) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, ___, 24, 27 = 21 (T) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14 = 10 (O) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, ___, 39, 42 = 36 (U) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, ___, 16, 18 = 14 (L) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130 = 110 (S)
- Clue 4 (Place value): "FOUND CURLY RED HAIR NEAR THE CHARGER"What number has 8 tens and 1 one? = 81 (F) · What number has 7 tens and 8 ones? = 78 (L) · What number has 1 ten and 5 ones? = 15 (N) · What number has 2 tens and 7 ones? = 27 (O) · What number has 3 tens and 8 ones? = 38 (E) · What number has 5 tens and 5 ones? = 55 (G) · What number has 3 tens and 6 ones? = 36 (A) · What number has 9 tens and 7 ones? = 97 (D) · What number has 5 tens and 9 ones? = 59 (T) · What number has 3 tens and 0 ones? = 30 (C) · What number has 1 ten and 7 ones? = 17 (Y) · What number has 2 tens and 6 ones? = 26 (R) · What number has 4 tens and 1 one? = 41 (H) · What number has 3 tens and 7 ones? = 37 (U) · What number has 9 tens and 5 ones? = 95 (I)
- Clue 5 (Missing addends): surviving statement (box 11) → Milo Gear5 + ___ = 12 = 7 · 10 + ___ = 12 = 2 · 3 + ___ = 6 = 3 · 2 + ___ = 8 = 6 · 6 + ___ = 14 = 8 · 3 + ___ = 8 = 5 · 8 + ___ = 9 = 1 · 4 + ___ = 14 = 10 · 2 + ___ = 14 = 12 · 7 + ___ = 16 = 9 · 2 + ___ = 6 = 4
About this mystery
- Grade level
- Grade 1 math
- Math topics
- Addition, Subtraction, Skip counting, Place value, Missing addends
- Reading level
- grades 3-4
- Theme
- The Mystery of the Golden E-Scooter — set in Volt City Bike Park
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects