🔎 Legos and a new yellow transGrade 2Reading: grades 1-2AdditionSubtractionPlace valueMultiplicationMissing addends

The Case of the Missing Yellow Bolt

Bolt is the new yellow transformer in Brick City. He can turn into a race car in one click. But last night someone snatched Bolt right off his shelf, and now the city needs you to find the Brick Snatcher.

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	Transform Mode	Brick Gadget	Builder Type	Brick Color	Weak Spot
Gear	Race Car	Smoke Puff	girl minifig	green bricks	trips on loose bricks
Dot	Speed Boat	Magnet Hands	girl minifig	red bricks	very ticklish
Nova	Race Car	Light Beam	boy minifig	red bricks	very ticklish
Brick	Robot Dog	Grappling Hook	girl minifig	red bricks	very ticklish
Mia	Speed Boat	Spring Legs	boy minifig	blue bricks	trips on loose bricks
Max	Robot Dog	Smoke Puff	boy minifig	red bricks	very ticklish
Bolt	Speed Boat	Spring Legs	boy minifig	blue bricks	very ticklish
Lux	Speed Boat	Grappling Hook	boy minifig	red bricks	trips on loose bricks
Snap	Speed Boat	Light Beam	girl minifig	green bricks	trips on loose bricks
Sparky	Speed Boat	Spring Legs	boy minifig	green bricks	very ticklish
Roxy	Helicopter	Smoke Puff	girl minifig	blue bricks	very ticklish
Stud	Race Car	Magnet Hands	boy minifig	green bricks	afraid of water
Dash	Robot Dog	Light Beam	girl minifig	green bricks	afraid of water
Rex	Race Car	Smoke Puff	boy minifig	red bricks	afraid of water
Jet	Helicopter	Spring Legs	boy minifig	red bricks	very ticklish
Pip	Race Car	Spring Legs	boy minifig	red bricks	trips on loose bricks
Lily	Speed Boat	Light Beam	boy minifig	blue bricks	afraid of water
Finn	Helicopter	Smoke Puff	boy minifig	green bricks	very ticklish
Coral	Jet Plane	Grappling Hook	girl minifig	red bricks	very ticklish
Plate	Helicopter	Light Beam	boy minifig	red bricks	very ticklish
Tile	Race Car	Magnet Hands	boy minifig	red bricks	very ticklish

Clue 1

Addition

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

58 + 24 =T

20 + 30 =H

26 + 53 =E

49 + 26 =V

12 + 23 =I

39 + 37 =L

12 + 26 =A

27 + 20 =N

43 + 50 =C

32 + 38 =O

23 + 32 =U

37 + 60 =S

21 + 37 =P

53 + 42 =R

27 + 22 =G

0/15 letters found

Clue 2

Subtraction

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

74 - 7 =A

35 - 10 =W

105 - 24 =I

81 - 38 =T

75 - 13 =N

86 - 1 =E

81 - 9 =S

88 - 2 =B

64 - 35 =O

81 - 8 =Y

18 - 4 =M

100 - 32 =F

104 - 22 =G

113 - 29 =R

116 - 33 =U

0/15 letters found

Clue 3

Place value (tens & ones)

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

What number has 5 tens and 3 ones?W

What number has 3 tens and 0 ones?E

What number has 8 tens and 6 ones?T

What number has 1 ten and 1 one?I

What number has 9 tens and 3 ones?C

What number has 3 tens and 3 ones?K

What number has 6 tens and 4 ones?L

What number has 5 tens and 0 ones?D

What number has 9 tens and 7 ones?H

What number has 9 tens and 8 ones?V

What number has 5 tens and 6 ones?A

What number has 2 tens and 9 ones?N

What number has 7 tens and 0 ones?O

What number has 6 tens and 3 ones?G

What number has 1 ten and 7 ones?Y

0/15 letters found

Clue 4

Multiplication facts (1–12)

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

110

121

2 × 1 =R

1 × 1 =E

3 × 7 =D

11 × 10 =B

3 × 9 =I

8 × 7 =C

12 × 4 =K

4 × 8 =S

6 × 4 =W

5 × 11 =L

7 × 11 =F

7 × 2 =T

11 × 1 =A

11 × 11 =H

8 × 11 =N

0/15 letters found

Clue 5

Missing addends — the last 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

4 + ▢ = 16

9 + ▢ = 18

10 + ▢ = 20

7 + ▢ = 10

8 + ▢ = 16

3 + ▢ = 10

8 + ▢ = 14

8 + ▢ = 12

3 + ▢ = 5

1 + ▢ = 6

9 + ▢ = 10

Step 2 — cross out the sentence with each answer

1.The villain sneaks up as a robot dog, then swings off on a grappling hook.

2.The villain spins in as a helicopter, then hops away on spring legs.

3.The villain sneaks up as a robot dog, then hops away on spring legs.

4.The villain speeds over as a speed boat, then hops away on spring legs.

5.The villain zooms in as a race car, then swings off on a grappling hook.

6.The villain zooms in as a race car, then hides in a smoke puff.

7.The villain sneaks up as a robot dog, then blinds the guards with a light beam.

8.The villain swoops down as a jet plane, then grabs the loot with magnet hands.

9.The villain zooms in as a race car, then grabs the loot with magnet hands.

10.The villain zooms in as a race car, then blinds the guards with a light beam.

11.The villain spins in as a helicopter, then blinds the guards with a light beam.

12.The villain sneaks up as a robot dog, then hides in a smoke puff.

Solve it

Name the culprit

Choose the one suspect left standing.

Answer Key — The Case of the Missing Yellow Bolt

Culprit: Plate (Helicopter · Light Beam · boy minifig · red bricks · very ticklish)

Clue 1 (Addition): "THE VILLAIN CANNOT USE SPRING LEGS"
58 + 24 = 82 (T) · 20 + 30 = 50 (H) · 26 + 53 = 79 (E) · 49 + 26 = 75 (V) · 12 + 23 = 35 (I) · 39 + 37 = 76 (L) · 12 + 26 = 38 (A) · 27 + 20 = 47 (N) · 43 + 50 = 93 (C) · 32 + 38 = 70 (O) · 23 + 32 = 55 (U) · 37 + 60 = 97 (S) · 21 + 37 = 58 (P) · 53 + 42 = 95 (R) · 27 + 22 = 49 (G)
Clue 2 (Subtraction): "A WITNESS SAW A BOY MINIFIG RUN OFF"
74 - 7 = 67 (A) · 35 - 10 = 25 (W) · 105 - 24 = 81 (I) · 81 - 38 = 43 (T) · 75 - 13 = 62 (N) · 86 - 1 = 85 (E) · 81 - 9 = 72 (S) · 88 - 2 = 86 (B) · 64 - 35 = 29 (O) · 81 - 8 = 73 (Y) · 18 - 4 = 14 (M) · 100 - 32 = 68 (F) · 104 - 22 = 82 (G) · 113 - 29 = 84 (R) · 116 - 33 = 83 (U)
Clue 3 (Place value (tens & ones)): "WE TICKLED THE VILLAIN TO GET AWAY"
What number has 5 tens and 3 ones? = 53 (W) · What number has 3 tens and 0 ones? = 30 (E) · What number has 8 tens and 6 ones? = 86 (T) · What number has 1 ten and 1 one? = 11 (I) · What number has 9 tens and 3 ones? = 93 (C) · What number has 3 tens and 3 ones? = 33 (K) · What number has 6 tens and 4 ones? = 64 (L) · What number has 5 tens and 0 ones? = 50 (D) · What number has 9 tens and 7 ones? = 97 (H) · What number has 9 tens and 8 ones? = 98 (V) · What number has 5 tens and 6 ones? = 56 (A) · What number has 2 tens and 9 ones? = 29 (N) · What number has 7 tens and 0 ones? = 70 (O) · What number has 6 tens and 3 ones? = 63 (G) · What number has 1 ten and 7 ones? = 17 (Y)
Clue 4 (Multiplication facts (1–12)): "RED BRICKS WERE LEFT AT THE SCENE"
2 × 1 = 2 (R) · 1 × 1 = 1 (E) · 3 × 7 = 21 (D) · 11 × 10 = 110 (B) · 3 × 9 = 27 (I) · 8 × 7 = 56 (C) · 12 × 4 = 48 (K) · 4 × 8 = 32 (S) · 6 × 4 = 24 (W) · 5 × 11 = 55 (L) · 7 × 11 = 77 (F) · 7 × 2 = 14 (T) · 11 × 1 = 11 (A) · 11 × 11 = 121 (H) · 8 × 11 = 88 (N)
Clue 5 (Missing addends): surviving statement (box 11) → Plate
4 + ▢ = 16 = 12 · 9 + ▢ = 18 = 9 · 10 + ▢ = 20 = 10 · 7 + ▢ = 10 = 3 · 8 + ▢ = 16 = 8 · 3 + ▢ = 10 = 7 · 8 + ▢ = 14 = 6 · 8 + ▢ = 12 = 4 · 3 + ▢ = 5 = 2 · 1 + ▢ = 6 = 5 · 9 + ▢ = 10 = 1

About this mystery

Grade level: Grade 2 math
Math topics: Addition, Subtraction, Place value, Multiplication, Missing addends
Reading level: grades 1-2
Theme: The Case of the Missing Yellow Bolt — set in Brick City, a town built from Legos
Format: Interactive online & printable worksheet with answer key
Solution: One unique, verified culprit among 21 suspects