🤖 Robots, MinecraftGrade 2Reading: grades 3-4Place valueAdditionSubtractionMultiplicationMissing addends
The Golden Redstone Core Mystery
Someone broke into the Blocky Biotech Lab and snatched the Golden Redstone Core! If they power it up, they will control every machine in the biome. Use your math skills and search for clues to shut down the rogue bot.
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 | Mining Power | Backpack Tool | Hand Grip | Head Wires | Robot Glitch |
|---|---|---|---|---|---|
| Ada | laser mining | solar shield | left grip | green wires | water splash |
| Creeper | super jumping | sonic buzzer | right grip | green wires | rust potion |
| Geary | fast building | rocket boots | right grip | green wires | rust potion |
| Clank | super jumping | solar shield | right grip | green wires | water splash |
| Widget | laser mining | sonic buzzer | right grip | blue wires | sticky slime |
| Byte | fast building | solar shield | left grip | blue wires | water splash |
| Sprocket | fast building | magnet arm | right grip | green wires | sticky slime |
| Pixel | super jumping | sonic buzzer | right grip | green wires | water splash |
| Cinder | super jumping | hover fan | left grip | green wires | water splash |
| Screwy | fast building | rocket boots | right grip | blue wires | water splash |
| Goldie | fast building | magnet arm | right grip | red wires | rust potion |
| Jeb | laser mining | solar shield | right grip | blue wires | rust potion |
| Steve | fast building | sonic buzzer | left grip | green wires | water splash |
| Voxel | super jumping | sonic buzzer | right grip | green wires | sticky slime |
| Endy | fast building | hover fan | left grip | red wires | sticky slime |
| Redstone | fast building | sonic buzzer | left grip | green wires | sticky slime |
| Cobble | lava walking | rocket boots | right grip | green wires | rust potion |
| Alex | lava walking | sonic buzzer | left grip | green wires | water splash |
| Rusty | fast building | magnet arm | left grip | green wires | water splash |
| Copper | teleporting | magnet arm | left grip | red wires | water splash |
| Sparky | teleporting | sonic buzzer | left grip | green wires | sticky slime |
Clue 1
Place value
The security monitor shows a digital grid. To read the secret code, find which digit is in the tens place on the control panel.
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
45
48
59
39
46
97
46
T
45
48
73
59
75
88
46
59
68
21
46
T
45
48
31
62
59
31
48
46
62
59
39
75
31
21
What number has 4 tens and 5 ones?T
What number has 7 tens and 5 ones?F
What number has 3 tens and 9 ones?R
What number has 6 tens and 2 ones?V
What number has 6 tens and 8 ones?S
What number has 4 tens and 8 ones?H
What number has 8 tens and 8 ones?D
What number has 5 tens and 9 ones?E
What number has 3 tens and 1 one?A
What number has 9 tens and 7 ones?B
What number has 2 tens and 1 one?N
What number has 4 tens and 6 ones?O
What number has 7 tens and 3 ones?I
0/13 letters found
Clue 2
Addition
We found a chest filled with spare redstone repeaters and pistons. Add them up to see how many parts the thief dropped.
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
28
65
79
33
54
72
72
41
33
54
86
33
41
79
25
T
28
65
79
27
74
72
33
41
62
78
T
28
65
86
74
79
46
T
28
90
54
78
26
13 + 15 =T
34 + 38 =O
17 + 10 =B
45 + 41 =A
27 + 14 =K
9 + 16 =D
21 + 12 =C
31 + 15 =F
51 + 23 =L
55 + 24 =E
36 + 18 =R
19 + 7 =P
37 + 53 =G
42 + 20 =W
42 + 36 =I
19 + 46 =H
0/16 letters found
Clue 3
Subtraction
The power level in the robot recharge station is dropping. Subtract the leftover fuel cells to see how much energy the thief drained.
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
63
36
29
31
A
63
36
88
55
21
48
A
63
64
38
17
36
88
55
17
64
38
59
64
88
38
36
74
36
64
38
13
94 - 31 =A
95 - 36 =D
45 - 9 =S
64 - 26 =E
103 - 29 =Y
33 - 4 =P
47 - 30 =R
63 - 15 =W
16 - 3 =M
97 - 9 =H
40 - 19 =F
72 - 17 =O
59 - 28 =L
85 - 21 =T
0/14 letters found
Clue 4
Multiplication facts (1-12)
There are rows of charging docks lining the wall. Multiply the number of docks in each row to find the total charging capacity.
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
1
60
77
40
16
2
22
7
21
60
60
2
W
1
3
21
60
72
9
45
45
8
60
88
21
3
80
60
72
88
60
2
60
1 × 1 =W
1 × 2 =N
10 × 4 =O
7 × 11 =F
2 × 11 =D
7 × 3 =R
1 × 3 =I
5 × 9 =T
4 × 2 =H
9 × 1 =A
4 × 4 =U
1 × 7 =G
8 × 9 =S
8 × 11 =C
8 × 10 =M
5 × 12 =E
0/16 letters found
Clue 5
Missing addends — the last clue
We need to calibrate the radar. Figure out what missing number of signals we need to add to reach the target total.
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 + ___ = 5
6 + ___ = 8
5 + ___ = 9
10 + ___ = 21
3 + ___ = 9
3 + ___ = 10
10 + ___ = 19
5 + ___ = 15
1 + ___ = 13
7 + ___ = 8
1 + ___ = 6
Step 2 — cross out the sentence with each answer
1.The villain strides across the hot lava lake, then pulls iron ingots with a magnet arm.
2.The villain stacks blocks to reach the ceiling, then pulls iron ingots with a magnet arm.
3.The villain uses a mining laser to cut through bedrock, then shines a solar shield to blind the cameras.
4.The villain strides across the hot lava lake, then shatters glass with a sonic buzzer.
5.The villain teleports past the iron golems, then drifts over traps with a hover fan.
6.The villain leaps over the obsidian wall, then shines a solar shield to blind the cameras.
7.The villain uses a mining laser to cut through bedrock, then pulls iron ingots with a magnet arm.
8.The villain stacks blocks to reach the ceiling, then shatters glass with a sonic buzzer.
9.The villain leaps over the obsidian wall, then shatters glass with a sonic buzzer.
10.The villain strides across the hot lava lake, then blasts away with noisy rocket boots.
11.The villain uses a mining laser to cut through bedrock, then blasts away with noisy rocket boots.
12.The villain leaps over the obsidian wall, then blasts away with noisy rocket boots.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Golden Redstone Core Mystery
Culprit: Steve (fast building · sonic buzzer · left grip · green wires · water splash)
- Clue 1 (Place value): "THE ROBO THIEF DOES NOT HAVE A HOVER FAN"What number has 4 tens and 5 ones? = 45 (T) · What number has 7 tens and 5 ones? = 75 (F) · What number has 3 tens and 9 ones? = 39 (R) · What number has 6 tens and 2 ones? = 62 (V) · What number has 6 tens and 8 ones? = 68 (S) · What number has 4 tens and 8 ones? = 48 (H) · What number has 8 tens and 8 ones? = 88 (D) · What number has 5 tens and 9 ones? = 59 (E) · What number has 3 tens and 1 one? = 31 (A) · What number has 9 tens and 7 ones? = 97 (B) · What number has 2 tens and 1 one? = 21 (N) · What number has 4 tens and 6 ones? = 46 (O) · What number has 7 tens and 3 ones? = 73 (I)
- Clue 2 (Addition): "THE CROOK CRACKED THE BLOCK WITH A LEFT GRIP"13 + 15 = 28 (T) · 34 + 38 = 72 (O) · 17 + 10 = 27 (B) · 45 + 41 = 86 (A) · 27 + 14 = 41 (K) · 9 + 16 = 25 (D) · 21 + 12 = 33 (C) · 31 + 15 = 46 (F) · 51 + 23 = 74 (L) · 55 + 24 = 79 (E) · 36 + 18 = 54 (R) · 19 + 7 = 26 (P) · 37 + 53 = 90 (G) · 42 + 20 = 62 (W) · 42 + 36 = 78 (I) · 19 + 46 = 65 (H)
- Clue 3 (Subtraction): "A SPLASH OF WATER SHORTED THE SYSTEM"94 - 31 = 63 (A) · 95 - 36 = 59 (D) · 45 - 9 = 36 (S) · 64 - 26 = 38 (E) · 103 - 29 = 74 (Y) · 33 - 4 = 29 (P) · 47 - 30 = 17 (R) · 63 - 15 = 48 (W) · 16 - 3 = 13 (M) · 97 - 9 = 88 (H) · 40 - 19 = 21 (F) · 72 - 17 = 55 (O) · 59 - 28 = 31 (L) · 85 - 21 = 64 (T)
- Clue 4 (Multiplication facts (1-12)): "WE FOUND GREEN WIRES AT THE CRIME SCENE"1 × 1 = 1 (W) · 1 × 2 = 2 (N) · 10 × 4 = 40 (O) · 7 × 11 = 77 (F) · 2 × 11 = 22 (D) · 7 × 3 = 21 (R) · 1 × 3 = 3 (I) · 5 × 9 = 45 (T) · 4 × 2 = 8 (H) · 9 × 1 = 9 (A) · 4 × 4 = 16 (U) · 1 × 7 = 7 (G) · 8 × 9 = 72 (S) · 8 × 11 = 88 (C) · 8 × 10 = 80 (M) · 5 × 12 = 60 (E)
- Clue 5 (Missing addends): surviving statement (box 8) → Steve2 + ___ = 5 = 3 · 6 + ___ = 8 = 2 · 5 + ___ = 9 = 4 · 10 + ___ = 21 = 11 · 3 + ___ = 9 = 6 · 3 + ___ = 10 = 7 · 10 + ___ = 19 = 9 · 5 + ___ = 15 = 10 · 1 + ___ = 13 = 12 · 7 + ___ = 8 = 1 · 1 + ___ = 6 = 5
About this mystery
- Grade level
- Grade 2 math
- Math topics
- Place value, Addition, Subtraction, Multiplication, Missing addends
- Reading level
- grades 3-4
- Theme
- The Golden Redstone Core Mystery — set in The Blocky Biotech Lab
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects