Math Mysteries
🏎️ Legos, building, constructioGrade 2Reading: grades 1-2AdditionSubtractionWord problemsPlace valueMissing addends

The Great Toy Brick Heist

Oh no! The Golden Brick has been stolen from the Brick City Museum! The Chief Architect needs your help. A Rogue Builder took it. We must find them before they rebuild the whole city in the wrong colors!

Suspects

Possible suspects

Cross off a row as each clue rules it out. On screen, tap a row.

21 of 21 still in play
NameBuilding StyleSpecial ToolHandednessHair PieceBuilding Flaw
Sienna StoneTower-climbingLaser LevelerRight-handed builderSpiky blue hairLoose baseplates
Wendy WallColor-sortingMagnetic GlovesRight-handed builderCurly brown hairSlippery slopes
Artie ArchColor-sortingMagnetic GlovesRight-handed builderCurly brown hairLoose baseplates
Pip PlasticSpeed-stackingMagnetic GlovesRight-handed builderCurly brown hairMissing corner bricks
Pip PinBridge-craftingBrick SeparatorRight-handed builderSpiky blue hairLoose baseplates
Peter PegTower-climbingSuction BootsLeft-handed builderCurly brown hairSlippery slopes
Bella BeamColor-sortingSuction BootsLeft-handed builderSpiky blue hairSlippery slopes
GodtfredSpeed-stackingLaser LevelerLeft-handed builderCurly brown hairSlippery slopes
Cody CornerSpeed-stackingPower DrillRight-handed builderCurly brown hairSlippery slopes
Clara ClayColor-sortingPower DrillRight-handed builderYellow hard hatSlippery slopes
Toby TileBridge-craftingMagnetic GlovesRight-handed builderYellow hard hatLoose baseplates
Ole KirkTower-climbingBrick SeparatorRight-handed builderSpiky blue hairSlippery slopes
Benny BlueBridge-craftingBrick SeparatorLeft-handed builderYellow hard hatLoose baseplates
Buster BlockBridge-craftingSuction BootsLeft-handed builderCurly brown hairLoose baseplates
Penny PlateTower-climbingMagnetic GlovesRight-handed builderSpiky blue hairLoose baseplates
MasonBridge-craftingBrick SeparatorLeft-handed builderCurly brown hairSlippery slopes
Gaby GlueBridge-craftingBrick SeparatorRight-handed builderCurly brown hairSlippery slopes
Sammy SlopeBridge-craftingSuction BootsRight-handed builderCurly brown hairSlippery slopes
Studs McgeeTower-climbingMagnetic GlovesRight-handed builderCurly brown hairSlippery slopes
Danny DomeBridge-craftingMagnetic GlovesRight-handed builderYellow hard hatMissing corner bricks
Gwen GirderTower-climbingSuction BootsRight-handed builderYellow hard hatSlippery slopes
Clue 1

Addition

We found some dropped bricks on the floor. Add them up to find the first clue!

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
32
30
90
91
26
90
64
67
42
80
88
34
34
64
88
26
33
72
90
91
26
72
T
32
35
91
90
64
97
72
93
90
41
33
41
88
34
34
9 + 23 =T
12 + 22 =L
17 + 24 =R
39 + 25 =A
33 + 39 =O
52 + 28 =V
13 + 20 =D
21 + 9 =H
61 + 27 =I
38 + 29 =K
20 + 22 =Y
25 + 10 =U
60 + 30 =E
55 + 36 =S
37 + 60 =P
48 + 45 =W
15 + 11 =N
0/17 letters found
Clue 2

Subtraction

A tall stack of bricks was knocked over. Subtract the broken ones to get the next clue.

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
22
85
77
74
58
58
T
22
56
48
28
84
T
22
62
56
48
58
68
77
66
48
28
44
85
T
22
85
66
84
17
77
17
46
40
28
86
17
77
48
57 - 35 =T
66 - 8 =O
47 - 3 =G
71 - 9 =S
35 - 18 =D
92 - 6 =L
74 - 26 =R
74 - 6 =V
39 - 11 =I
92 - 8 =N
113 - 28 =H
65 - 19 =B
91 - 35 =P
47 - 7 =U
103 - 37 =A
105 - 28 =E
98 - 24 =F
0/17 letters found
Clue 3

Word problems

The thief left a note about building blocks. Solve this word puzzle to read it.

Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.

Someonescaredthevillainoffwith
S
36
21
7
15
15
34
22
32
S
36
21
O
 
15
34
S
36
.
There were 38 plastic studs. 2 were used up. How many plastic studs are left?S
Master builder found 4 yellow tiles yesterday and 3 more today. How many yellow tiles in all?I
There were 25 plastic studs. 10 were used up. How many plastic studs are left?P
Master builder lined up 11 rows of 2 yellow tiles. How many yellow tiles in all?R
Master builder found 25 red bricks yesterday and 9 more today. How many red bricks in all?E
There were 39 yellow tiles. 7 were used up. How many yellow tiles are left?Y
Master builder lined up 3 rows of 7 red bricks. How many red bricks in all?L
0/7 letters found
Clue 4

Place value

Look at this digital blueprint. Count the tens and ones to unlock this clue.

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
63
13
95
49
15
30
30
13
28
68
76
99
59
79
27
99
15
W
63
51
21
46
29
99
29
51
30
21
13
68
59
46
79
What number has 6 tens and 3 ones?W
What number has 7 tens and 9 ones?Y
What number has 2 tens and 1 one?H
What number has 4 tens and 9 ones?P
What number has 4 tens and 6 ones?A
What number has 2 tens and 7 ones?B
What number has 7 tens and 6 ones?U
What number has 9 tens and 5 ones?S
What number has 5 tens and 9 ones?L
What number has 6 tens and 8 ones?C
What number has 2 tens and 9 ones?I
What number has 9 tens and 9 ones?R
What number has 5 tens and 1 one?N
What number has 1 ten and 5 ones?O
What number has 2 tens and 8 ones?D
What number has 3 tens and 0 ones?T
What number has 1 ten and 3 ones?E
0/17 letters found
Clue 5

Missing addends — the last clue

A brick wall has a few missing pieces. Find the missing number to finish the wall and see the clue.

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
10 + ___ = 20
6 + ___ = 7
4 + ___ = 11
10 + ___ = 16
4 + ___ = 15
3 + ___ = 8
5 + ___ = 7
10 + ___ = 19
10 + ___ = 18
6 + ___ = 10
5 + ___ = 8
Step 2 — cross out the sentence with each answer
1.The villain creates a long arch bridge, then walks up the wall with boots.
2.The villain scales the tallest tower, then shines a bright green laser.
3.The villain sorts all the plastic blocks, then shines a bright green laser.
4.The villain creates a long arch bridge, then grabs metal beams with gloves.
5.The villain scales the tallest tower, then walks up the wall with boots.
6.The villain stacks bricks in a flash, then grabs metal beams with gloves.
7.The villain creates a long arch bridge, then pops bricks apart with a tool.
8.The villain stacks bricks in a flash, then drills a hole in the floor.
9.The villain stacks bricks in a flash, then walks up the wall with boots.
10.The villain sorts all the plastic blocks, then grabs metal beams with gloves.
11.The villain builds a tiny micro-model, then walks up the wall with boots.
12.The villain scales the tallest tower, then grabs metal beams with gloves.
Solve it

Name the culprit

Choose the one suspect left standing.

About this mystery

Grade level
Grade 2 math
Math topics
Addition, Subtraction, Word problems, Place value, Missing addends
Reading level
grades 1-2
Theme
The Great Toy Brick Heist — set in Brick City
Format
Interactive online & printable worksheet with answer key
Solution
One unique, verified culprit among 21 suspects

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