🤖 RobotsGrade 1Reading: grades 1-2AdditionSubtractionSkip countingPlace valueMissing addends
The Mystery of the Mischievous Bot
A rogue bot is making a mess at Gear Creek Robot Factory! The Chief Engineer needs your help to find out which robot went haywire. Collect clues to solve the mystery!
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 | Gadget Tool | Power Source | Dominant Hand | Wire Color | Reset Trick |
|---|---|---|---|---|---|
| Bolt | Oil Sprayer | Radar Dish | Left Handed | Blue Wires | Bright Flash |
| Rivets | Oil Sprayer | Silver Antenna | Right Handed | Blue Wires | Bright Flash |
| Flux | Oil Sprayer | Bronze Battery | Left Handed | Green Wires | Bright Flash |
| Sprocket | Super Magnet | Radar Dish | Right Handed | Green Wires | Loud Clap |
| Widget | Oil Sprayer | Bronze Battery | Right Handed | Green Wires | Bright Flash |
| Data | Rocket Boots | Silver Antenna | Right Handed | Green Wires | Loud Clap |
| Chip | Sonic Whistle | Radar Dish | Right Handed | Blue Wires | Bright Flash |
| Axle | Oil Sprayer | Micro Chip | Right Handed | Green Wires | Loud Clap |
| Volt | Super Magnet | Radar Dish | Left Handed | Red Wires | Water Splash |
| Sparky | Oil Sprayer | Micro Chip | Right Handed | Red Wires | Water Splash |
| Rust-E | Sonic Whistle | Micro Chip | Right Handed | Blue Wires | Water Splash |
| Gears | Super Magnet | Bronze Battery | Left Handed | Red Wires | Water Splash |
| Radar | Laser Torch | Micro Chip | Right Handed | Blue Wires | Bright Flash |
| Circuit | Super Magnet | Solar Panel | Right Handed | Red Wires | Loud Clap |
| Copper | Super Magnet | Bronze Battery | Left Handed | Green Wires | Loud Clap |
| Zinc | Laser Torch | Micro Chip | Right Handed | Green Wires | Loud Clap |
| Clinker | Rocket Boots | Bronze Battery | Right Handed | Green Wires | Loud Clap |
| Echo | Super Magnet | Micro Chip | Left Handed | Green Wires | Loud Clap |
| Piston | Laser Torch | Micro Chip | Right Handed | Red Wires | Bright Flash |
| Tinker | Sonic Whistle | Radar Dish | Right Handed | Green Wires | Water Splash |
| Beep | Super Magnet | Silver Antenna | Right Handed | Blue Wires | Bright Flash |
Clue 1
Addition
Detective Bot adds up the lost gears found near the workbench.
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
18
2
3
13
17
5
5
20
17
12
7
14
3
9
12
14
T
18
2
20
13
3
20
11
8
14
12
19
3
11
20
T
18
T
18
3
8
15
9 + 9 =T
1 + 2 =E
5 + 6 =B
3 + 4 =D
7 + 6 =V
3 + 6 =S
2 + 6 =R
12 + 5 =I
1 + 1 =H
4 + 1 =L
10 + 4 =O
7 + 8 =Y
13 + 7 =A
9 + 10 =Z
6 + 6 =N
0/15 letters found
Clue 2
Subtraction
Detective Bot takes away the broken bolts from the total count.
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
9
1
16
7
4
T
9
5
3
8
11
8
10
13
2
10
T
9
8
18
10
2
1
T
9
1
3
13
17
14 - 5 =T
19 - 3 =E
14 - 4 =I
11 - 3 =S
19 - 6 =N
12 - 1 =U
9 - 5 =O
6 - 1 =W
3 - 2 =H
20 - 2 =R
10 - 3 =B
20 - 3 =D
5 - 3 =G
10 - 7 =A
0/14 letters found
Clue 3
Skip counting
Detective Bot counts the spare batteries in groups of five.
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
16
24
65
45
15
42
24
A
16
50
33
27
65
50
33
27
40
21
10
65
130
45
21
26
65
27
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20A
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, ___, 140, 150G
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, ___, 24, 27E
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39S
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33T
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, ___, 45, 48C
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, ___, 27, 30L
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55U
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, ___, 28, 30B
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, ___, 60, 70P
Skip-count by 5s. Fill the blank: 5, 10, ___, 20, 25D
Skip-count by 10s. Fill the blank: 10, 20, 30, ___, 50, 60H
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, ___, 70, 75O
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14R
0/14 letters found
Clue 4
Place value
Detective Bot looks at tens and ones on the robot code screen.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
G
11
80
85
85
61
35
90
80
85
51
35
85
80
85
51
61
90
83
83
85
42
20
46
46
17
85
76
85
61
30
17
What number has 1 ten and 1 one?G
What number has 8 tens and 3 ones?P
What number has 6 tens and 1 one?N
What number has 9 tens and 0 ones?I
What number has 4 tens and 6 ones?T
What number has 3 tens and 0 ones?C
What number has 5 tens and 1 one?S
What number has 8 tens and 0 ones?R
What number has 2 tens and 0 ones?A
What number has 8 tens and 5 ones?E
What number has 1 ten and 7 ones?H
What number has 7 tens and 6 ones?B
What number has 4 tens and 2 ones?D
What number has 3 tens and 5 ones?W
0/14 letters found
Clue 5
Missing addends — the last clue
Detective Bot finds out how many extra wires are needed to fix the power box.
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
7 + ___ = 15
3 + ___ = 13
2 + ___ = 7
6 + ___ = 8
6 + ___ = 18
8 + ___ = 12
3 + ___ = 12
7 + ___ = 10
7 + ___ = 14
8 + ___ = 14
5 + ___ = 16
Step 2 — cross out the sentence with each answer
1.The villain blasted up to the roof, then sent out a radio signal.
2.The villain blasted up to the roof, then drained power from a battery.
3.The villain blasted up to the roof, then charged up in the bright sun.
4.The villain pulled all the loose gears, then drained power from a battery.
5.The villain pulled all the loose gears, then scanned the room for scrap metal.
6.The villain zapped the main control box, then charged up in the bright sun.
7.The villain blasted up to the roof, then saved the glitchy code.
8.The villain zapped the main control box, then saved the glitchy code.
9.The villain sprayed slippery oil around, then sent out a radio signal.
10.The villain sprayed slippery oil around, then saved the glitchy code.
11.The villain pulled all the loose gears, then sent out a radio signal.
12.The villain sprayed slippery oil around, then charged up in the bright sun.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Mystery of the Mischievous Bot
Culprit: Data (Rocket Boots · Silver Antenna · Right Handed · Green Wires · Loud Clap)
- Clue 1 (Addition): "THE VILLAIN DOES NOT HAVE A BRONZE BATTERY"9 + 9 = 18 (T) · 1 + 2 = 3 (E) · 5 + 6 = 11 (B) · 3 + 4 = 7 (D) · 7 + 6 = 13 (V) · 3 + 6 = 9 (S) · 2 + 6 = 8 (R) · 12 + 5 = 17 (I) · 1 + 1 = 2 (H) · 4 + 1 = 5 (L) · 10 + 4 = 14 (O) · 7 + 8 = 15 (Y) · 13 + 7 = 20 (A) · 9 + 10 = 19 (Z) · 6 + 6 = 12 (N)
- Clue 2 (Subtraction): "THE BOT WAS USING ITS RIGHT HAND"14 - 5 = 9 (T) · 19 - 3 = 16 (E) · 14 - 4 = 10 (I) · 11 - 3 = 8 (S) · 19 - 6 = 13 (N) · 12 - 1 = 11 (U) · 9 - 5 = 4 (O) · 6 - 1 = 5 (W) · 3 - 2 = 1 (H) · 20 - 2 = 18 (R) · 10 - 3 = 7 (B) · 20 - 3 = 17 (D) · 5 - 3 = 2 (G) · 10 - 7 = 3 (A)
- Clue 3 (Skip counting): "A LOUD CLAP STOPS THE ROGUE BOT"Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20 = 16 (A) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, ___, 140, 150 = 130 (G) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, ___, 24, 27 = 21 (E) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39 = 33 (S) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33 = 27 (T) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, ___, 45, 48 = 42 (C) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, ___, 27, 30 = 24 (L) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55 = 45 (U) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, ___, 28, 30 = 26 (B) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, ___, 60, 70 = 50 (P) · Skip-count by 5s. Fill the blank: 5, 10, ___, 20, 25 = 15 (D) · Skip-count by 10s. Fill the blank: 10, 20, 30, ___, 50, 60 = 40 (H) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, ___, 70, 75 = 65 (O) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14 = 10 (R)
- Clue 4 (Place value): "GREEN WIRES WERE SNIPPED AT THE BENCH"What number has 1 ten and 1 one? = 11 (G) · What number has 8 tens and 3 ones? = 83 (P) · What number has 6 tens and 1 one? = 61 (N) · What number has 9 tens and 0 ones? = 90 (I) · What number has 4 tens and 6 ones? = 46 (T) · What number has 3 tens and 0 ones? = 30 (C) · What number has 5 tens and 1 one? = 51 (S) · What number has 8 tens and 0 ones? = 80 (R) · What number has 2 tens and 0 ones? = 20 (A) · What number has 8 tens and 5 ones? = 85 (E) · What number has 1 ten and 7 ones? = 17 (H) · What number has 7 tens and 6 ones? = 76 (B) · What number has 4 tens and 2 ones? = 42 (D) · What number has 3 tens and 5 ones? = 35 (W)
- Clue 5 (Missing addends): surviving statement (box 1) → Data7 + ___ = 15 = 8 · 3 + ___ = 13 = 10 · 2 + ___ = 7 = 5 · 6 + ___ = 8 = 2 · 6 + ___ = 18 = 12 · 8 + ___ = 12 = 4 · 3 + ___ = 12 = 9 · 7 + ___ = 10 = 3 · 7 + ___ = 14 = 7 · 8 + ___ = 14 = 6 · 5 + ___ = 16 = 11
About this mystery
- Grade level
- Grade 1 math
- Math topics
- Addition, Subtraction, Skip counting, Place value, Missing addends
- Reading level
- grades 1-2
- Theme
- The Mystery of the Mischievous Bot — set in Gear Creek Robot Factory
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects