🚀 The case of the missing yellGrade 1Reading: grades 1-2AdditionSubtractionSkip countingPlace valueMissing addends
The Case of the Missing Yellow Minion Spaceship
Miles built a cool yellow minion spaceship out of shiny Lego bricks. But now the toy spaceship is gone! Miles and his helper friends Teddy and Margot must find the sneaky thief who took it.
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 | Lego Tool | Super Brick Color | Sticker Style | Minion Hair | Toy Defeat |
|---|---|---|---|---|---|
| Lance | Mega Hammer | Lime Green | Left Side Sticker | Bald Head Smooth | Stuck on Sticky Tape |
| Don | Mini Screwdriver | Glow Orange | Right Side Sticker | Spiky Hair Black | Trapped under a Cup |
| Jerry | Mega Hammer | Neon Blue | Left Side Sticker | Spiky Hair Black | Stuck on Sticky Tape |
| Jorge | Brick Separator | Sparkle Purple | Left Side Sticker | Bald Head Smooth | Trapped under a Cup |
| Mark | Mega Hammer | Sparkle Purple | Right Side Sticker | Tall Sprouts Black | Stuck on Sticky Tape |
| Phil | Tiny Wrench | Sparkle Purple | Left Side Sticker | Tall Sprouts Black | Trapped under a Cup |
| Gary | Suction Cup | Lime Green | Right Side Sticker | Spiky Hair Black | Trapped under a Cup |
| Mel | Mini Screwdriver | Sparkle Purple | Left Side Sticker | Spiky Hair Black | Dropped in Soap Water |
| Henry | Tiny Wrench | Sparkle Purple | Left Side Sticker | Bald Head Smooth | Trapped under a Cup |
| Stuart | Mega Hammer | Sparkle Purple | Right Side Sticker | Bald Head Smooth | Trapped under a Cup |
| Tim | Mini Screwdriver | Lime Green | Left Side Sticker | Bald Head Smooth | Trapped under a Cup |
| Paul | Mega Hammer | Lime Green | Right Side Sticker | Bald Head Smooth | Stuck on Sticky Tape |
| Eric | Suction Cup | Neon Blue | Left Side Sticker | Bald Head Smooth | Trapped under a Cup |
| Tom | Tiny Wrench | Neon Blue | Left Side Sticker | Tall Sprouts Black | Dropped in Soap Water |
| Kevin | Mini Screwdriver | Neon Blue | Left Side Sticker | Tall Sprouts Black | Dropped in Soap Water |
| Carl | Tiny Wrench | Sparkle Purple | Left Side Sticker | Bald Head Smooth | Stuck on Sticky Tape |
| Norbert | Tiny Wrench | Glow Orange | Right Side Sticker | Tall Sprouts Black | Trapped under a Cup |
| Jon | Brick Separator | Chrome Gold | Left Side Sticker | Bald Head Smooth | Stuck on Sticky Tape |
| Fred | Tiny Wrench | Sparkle Purple | Right Side Sticker | Spiky Hair Black | Stuck on Sticky Tape |
| Bob | Suction Cup | Neon Blue | Left Side Sticker | Bald Head Smooth | Stuck on Sticky Tape |
| Ken | Mega Hammer | Chrome Gold | Left Side Sticker | Bald Head Smooth | Trapped under a Cup |
Clue 1
Addition
Teddy counts the yellow Lego blocks left on the floor. He adds five blocks and four more blocks. The total sum leads us to the first hint.
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
17
15
5
T
17
15
18
5
7
15
9
2
14
12
14
5
12
14
13
8
16
5
8 + 9 =T
4 + 1 =E
3 + 10 =B
11 + 7 =I
3 + 6 =A
9 + 6 =H
4 + 10 =N
9 + 3 =O
1 + 1 =S
2 + 6 =L
3 + 4 =F
9 + 7 =U
0/12 letters found
Clue 2
Subtraction
Margot checks the tool box. She takes ten plastic wrenches away from the big pack of twelve. The subtraction tells us a helpful detail.
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
5
10
9
13
9
3
T
5
16
T
5
12
8
4
9
15
7
18
16
16
8
15
18
T
5
8
10
9
6
13 - 8 =T
16 - 1 =R
18 - 8 =H
8 - 1 =W
13 - 1 =I
8 - 4 =K
10 - 7 =F
9 - 1 =C
16 - 3 =L
17 - 8 =E
8 - 2 =D
20 - 2 =A
20 - 4 =S
0/13 letters found
Clue 3
Skip counting
Miles counts the yellow footprints on the dusty shelf. He counts them by twos to save time. This path reveals a hair sample.
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
50
22
25
15
120
60
T
50
T
50
27
28
10
10
25
8
35
21
8
25
27
28
30
35
10
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, ___, 55, 60T
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14P
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, ___, 18, 21Y
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, ___, 24, 26H
Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12D
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, ___, 30, 32A
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, ___, 130, 140G
Skip-count by 10s. Fill the blank: 10, 20, ___, 40, 50C
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, ___, 65, 70O
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, ___, 30, 35E
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33R
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, ___, 40, 45U
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, ___, 24, 27N
0/13 letters found
Clue 4
Place value (tens & ones)
Teddy finds a secret note under a Lego baseplate. It has a number with three tens and five ones. This place value code shows us the thief's tell.
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
88
38
15
65
36
87
44
44
56
85
32
15
38
87
44
13
85
38
87
91
96
32
87
96
17
44
What number has 8 tens and 8 ones?T
What number has 1 ten and 7 ones?K
What number has 8 tens and 7 ones?A
What number has 9 tens and 1 one?I
What number has 5 tens and 6 ones?D
What number has 9 tens and 6 ones?R
What number has 3 tens and 6 ones?L
What number has 4 tens and 4 ones?S
What number has 1 ten and 5 ones?E
What number has 8 tens and 5 ones?O
What number has 3 tens and 8 ones?H
What number has 1 ten and 3 ones?N
What number has 6 tens and 5 ones?G
What number has 3 tens and 2 ones?M
0/14 letters found
Clue 5
Missing addends — the last clue
Margot knows the ship needs six fuel parts. She only finds four parts on the rug. The missing number of parts shows us how to stop the thief.
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
9 + ___ = 21
5 + ___ = 8
3 + ___ = 5
9 + ___ = 18
9 + ___ = 19
3 + ___ = 8
3 + ___ = 9
9 + ___ = 20
3 + ___ = 4
10 + ___ = 14
8 + ___ = 15
Step 2 — cross out the sentence with each answer
1.The villain turns a tiny wrench, then shines in chrome gold.
2.The villain swings a mega hammer, then shines in chrome gold.
3.The villain clicks a brick separator, then glimmers in sparkle purple.
4.The villain clicks a brick separator, then shines in chrome gold.
5.The villain swings a mega hammer, then glares in glow orange.
6.The villain twists a mini screwdriver, then glows in neon blue.
7.The villain swings a mega hammer, then glimmers in sparkle purple.
8.The villain twists a mini screwdriver, then flashes in lime green.
9.The villain twists a mini screwdriver, then glimmers in sparkle purple.
10.The villain uses a suction cup, then shines in chrome gold.
11.The villain uses a suction cup, then glares in glow orange.
12.The villain turns a tiny wrench, then glimmers in sparkle purple.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Case of the Missing Yellow Minion Spaceship
Culprit: Tim (Mini Screwdriver · Lime Green · Left Side Sticker · Bald Head Smooth · Trapped under a Cup)
- Clue 1 (Addition): "THE THIEF HAS NO NEON BLUE"8 + 9 = 17 (T) · 4 + 1 = 5 (E) · 3 + 10 = 13 (B) · 11 + 7 = 18 (I) · 3 + 6 = 9 (A) · 9 + 6 = 15 (H) · 4 + 10 = 14 (N) · 9 + 3 = 12 (O) · 1 + 1 = 2 (S) · 2 + 6 = 8 (L) · 3 + 4 = 7 (F) · 9 + 7 = 16 (U)
- Clue 2 (Subtraction): "THE LEFT STICKER WAS SCRATCHED"13 - 8 = 5 (T) · 16 - 1 = 15 (R) · 18 - 8 = 10 (H) · 8 - 1 = 7 (W) · 13 - 1 = 12 (I) · 8 - 4 = 4 (K) · 10 - 7 = 3 (F) · 9 - 1 = 8 (C) · 16 - 3 = 13 (L) · 17 - 8 = 9 (E) · 8 - 2 = 6 (D) · 20 - 2 = 18 (A) · 20 - 4 = 16 (S)
- Clue 3 (Skip counting): "THEY GOT TRAPPED UNDER A CUP"Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, ___, 55, 60 = 50 (T) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14 = 10 (P) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, ___, 18, 21 = 15 (Y) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, ___, 24, 26 = 22 (H) · Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12 = 8 (D) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, ___, 30, 32 = 28 (A) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, ___, 130, 140 = 120 (G) · Skip-count by 10s. Fill the blank: 10, 20, ___, 40, 50 = 30 (C) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, ___, 65, 70 = 60 (O) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, ___, 30, 35 = 25 (E) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, ___, 30, 33 = 27 (R) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, ___, 40, 45 = 35 (U) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, ___, 24, 27 = 21 (N)
- Clue 4 (Place value (tens & ones)): "THE GLASS DOME HAS NO HAIR MARKS"What number has 8 tens and 8 ones? = 88 (T) · What number has 1 ten and 7 ones? = 17 (K) · What number has 8 tens and 7 ones? = 87 (A) · What number has 9 tens and 1 one? = 91 (I) · What number has 5 tens and 6 ones? = 56 (D) · What number has 9 tens and 6 ones? = 96 (R) · What number has 3 tens and 6 ones? = 36 (L) · What number has 4 tens and 4 ones? = 44 (S) · What number has 1 ten and 5 ones? = 15 (E) · What number has 8 tens and 5 ones? = 85 (O) · What number has 3 tens and 8 ones? = 38 (H) · What number has 1 ten and 3 ones? = 13 (N) · What number has 6 tens and 5 ones? = 65 (G) · What number has 3 tens and 2 ones? = 32 (M)
- Clue 5 (Missing addends): surviving statement (box 8) → Tim9 + ___ = 21 = 12 · 5 + ___ = 8 = 3 · 3 + ___ = 5 = 2 · 9 + ___ = 18 = 9 · 9 + ___ = 19 = 10 · 3 + ___ = 8 = 5 · 3 + ___ = 9 = 6 · 9 + ___ = 20 = 11 · 3 + ___ = 4 = 1 · 10 + ___ = 14 = 4 · 8 + ___ = 15 = 7
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 Case of the Missing Yellow Minion Spaceship — set in Miles's Lego playroom floor
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects