🚀 SpaceGrade 2Reading: grades 1-2MultiplicationWord problemsPlace valueAdditionDivision
The Mars Crystal Mystery
The gold space crystal is gone! The Space Bandit took it from the launch pad. We must find them before they fly away into deep space!
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 | Jetpack | Laser Tool | Glove Mark | Helmet Visor | Space Trap |
|---|---|---|---|---|---|
| Jessica | blue thrusters | ice cutter | left glove badge | green visor | sticky space slime |
| Alan | gravity boots | dust blaster | left glove badge | green visor | sticky space slime |
| Guion | red thrusters | ice cutter | left glove badge | green visor | bright flash light |
| Christina | bubble boots | moon beam | right glove badge | gold visor | magnetic net |
| Scott | blue thrusters | ice cutter | right glove badge | green visor | bright flash light |
| Michael | red thrusters | ice cutter | left glove badge | gold visor | sticky space slime |
| Edward | red thrusters | ice cutter | left glove badge | gold visor | bright flash light |
| Buzz | blue thrusters | moon beam | left glove badge | green visor | sticky space slime |
| Victor | gravity boots | rock grabber | left glove badge | green visor | sticky space slime |
| Guy | blue thrusters | moon beam | right glove badge | green visor | sticky space slime |
| Sally | solar wings | rock grabber | left glove badge | silver visor | sticky space slime |
| Neil | red thrusters | star laser | left glove badge | gold visor | sticky space slime |
| Sunita | blue thrusters | rock grabber | left glove badge | green visor | bright flash light |
| Roberta | solar wings | ice cutter | right glove badge | gold visor | magnetic net |
| Charles | red thrusters | dust blaster | right glove badge | gold visor | magnetic net |
| Mae | bubble boots | moon beam | left glove badge | green visor | magnetic net |
| Yuri | red thrusters | rock grabber | left glove badge | gold visor | bright flash light |
| John | blue thrusters | rock grabber | right glove badge | green visor | bright flash light |
| Kathy | bubble boots | star laser | right glove badge | green visor | magnetic net |
| Peggy | solar wings | moon beam | right glove badge | silver visor | sticky space slime |
| Kalpana | solar wings | star laser | left glove badge | green visor | sticky space slime |
Clue 1
Multiplication facts (1-12)
The space docks have rows of ships. We count the ships in groups to find a note.
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
30
18
9
2
15
121
6
55
T
30
6
64
9
25
121
64
T
30
56
25
9
T
30
18
9
6
56
25
T
30
2
108
15
25
T
30
9
21
5 × 6 =T
8 × 7 =U
7 × 3 =R
6 × 3 =H
11 × 5 =I
3 × 5 =A
11 × 11 =N
3 × 2 =D
2 × 1 =B
12 × 9 =L
5 × 5 =S
1 × 9 =E
8 × 8 =O
0/13 letters found
Clue 2
Word problems
A baby alien lost its space rocks. We solved the word puzzle to get a secret file.
Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.
Awitnesssawthevillainwas .
L
33
28
22
29
31
L
33
11
16
28
B
A
D
31
28
Zoggy found 8 alien coin yesterday and 25 more today. How many alien coin in all?L
There were 29 moon rock. 7 were used up. How many moon rock are left?F
Zoggy found 10 alien coin yesterday and 18 more today. How many alien coin in all?E
Zoggy found 7 toy rocket yesterday and 4 more today. How many toy rocket in all?O
There were 34 alien coin. 3 were used up. How many alien coin are left?G
Zoggy found 24 star badge yesterday and 5 more today. How many star badge in all?T
Zoggy lined up 2 rows of 8 star badge. How many star badge in all?V
0/7 letters found
Clue 3
Place value
The robot screen shows numbers in tens and ones. We read the code to unlock a drawer.
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
20
94
80
50
51
92
88
80
50
51
11
45
80
59
T
20
94
80
98
34
96
59
92
T
20
59
11
45
96
What number has 2 tens and 0 ones?T
What number has 9 tens and 6 ones?N
What number has 9 tens and 4 ones?H
What number has 1 ten and 1 one?O
What number has 9 tens and 8 ones?B
What number has 9 tens and 2 ones?I
What number has 8 tens and 0 ones?E
What number has 5 tens and 9 ones?D
What number has 5 tens and 1 one?L
What number has 4 tens and 5 ones?W
What number has 3 tens and 4 ones?A
What number has 5 tens and 0 ones?S
What number has 8 tens and 8 ones?M
0/13 letters found
Clue 4
Addition
We put together all the star charts. Adding up the map numbers shows a new path.
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
83
62
50
98
23
64
79
44
41
62
62
64
44
48
22
57
57
57
36
22
41
79
57
24 + 59 =W
8 + 15 =U
30 + 20 =F
24 + 55 =D
47 + 51 =O
18 + 44 =E
24 + 33 =S
19 + 17 =H
18 + 30 =L
24 + 20 =G
35 + 29 =N
9 + 13 =A
28 + 13 =R
0/13 letters found
Clue 5
Division facts (1-12) — the last clue
We split the power blocks into equal piles. Each pile has a secret clue on the bottom.
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
121 ÷ 11 = ?
72 ÷ 6 = ?
10 ÷ 10 = ?
36 ÷ 12 = ?
24 ÷ 4 = ?
7 ÷ 1 = ?
30 ÷ 6 = ?
54 ÷ 6 = ?
6 ÷ 3 = ?
90 ÷ 9 = ?
40 ÷ 5 = ?
Step 2 — cross out the sentence with each answer
1.The villain ran across the space dock, then stole the crystal with a rock grabber.
2.The villain leaped over the rover, then zapped the lock with a star laser.
3.The villain leaped over the rover, then cleared the path with a dust blaster.
4.The villain floated through the hatch, then zapped the lock with a star laser.
5.The villain flew past the satellite, then stole the crystal with a rock grabber.
6.The villain ran across the space dock, then cut the glass with an ice cutter.
7.The villain leaped over the rover, then stole the crystal with a rock grabber.
8.The villain flew past the satellite, then cleared the path with a dust blaster.
9.The villain floated through the hatch, then cut the glass with an ice cutter.
10.The villain flew past the satellite, then zapped the lock with a star laser.
11.The villain leaped over the rover, then melted the door with a moon beam.
12.The villain leaped over the rover, then cut the glass with an ice cutter.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Mars Crystal Mystery
Culprit: Kalpana (solar wings · star laser · left glove badge · green visor · sticky space slime)
- Clue 1 (Multiplication facts (1-12)): "THE BANDIT DOES NOT USE THE DUST BLASTER"5 × 6 = 30 (T) · 8 × 7 = 56 (U) · 7 × 3 = 21 (R) · 6 × 3 = 18 (H) · 11 × 5 = 55 (I) · 3 × 5 = 15 (A) · 11 × 11 = 121 (N) · 3 × 2 = 6 (D) · 2 × 1 = 2 (B) · 12 × 9 = 108 (L) · 5 × 5 = 25 (S) · 1 × 9 = 9 (E) · 8 × 8 = 64 (O)
- Clue 2 (Word problems): "LEFT GLOVE BADGE"Zoggy found 8 alien coin yesterday and 25 more today. How many alien coin in all? = 33 (L) · There were 29 moon rock. 7 were used up. How many moon rock are left? = 22 (F) · Zoggy found 10 alien coin yesterday and 18 more today. How many alien coin in all? = 28 (E) · Zoggy found 7 toy rocket yesterday and 4 more today. How many toy rocket in all? = 11 (O) · There were 34 alien coin. 3 were used up. How many alien coin are left? = 31 (G) · Zoggy found 24 star badge yesterday and 5 more today. How many star badge in all? = 29 (T) · Zoggy lined up 2 rows of 8 star badge. How many star badge in all? = 16 (V)
- Clue 3 (Place value): "THE SLIME SLOWED THE BANDIT DOWN"What number has 2 tens and 0 ones? = 20 (T) · What number has 9 tens and 6 ones? = 96 (N) · What number has 9 tens and 4 ones? = 94 (H) · What number has 1 ten and 1 one? = 11 (O) · What number has 9 tens and 8 ones? = 98 (B) · What number has 9 tens and 2 ones? = 92 (I) · What number has 8 tens and 0 ones? = 80 (E) · What number has 5 tens and 9 ones? = 59 (D) · What number has 5 tens and 1 one? = 51 (L) · What number has 4 tens and 5 ones? = 45 (W) · What number has 3 tens and 4 ones? = 34 (A) · What number has 5 tens and 0 ones? = 50 (S) · What number has 8 tens and 8 ones? = 88 (M)
- Clue 4 (Addition): "WE FOUND GREEN GLASS SHARDS"24 + 59 = 83 (W) · 8 + 15 = 23 (U) · 30 + 20 = 50 (F) · 24 + 55 = 79 (D) · 47 + 51 = 98 (O) · 18 + 44 = 62 (E) · 24 + 33 = 57 (S) · 19 + 17 = 36 (H) · 18 + 30 = 48 (L) · 24 + 20 = 44 (G) · 35 + 29 = 64 (N) · 9 + 13 = 22 (A) · 28 + 13 = 41 (R)
- Clue 5 (Division facts (1-12)): surviving statement (box 4) → Kalpana121 ÷ 11 = 11 · 72 ÷ 6 = 12 · 10 ÷ 10 = 1 · 36 ÷ 12 = 3 · 24 ÷ 4 = 6 · 7 ÷ 1 = 7 · 30 ÷ 6 = 5 · 54 ÷ 6 = 9 · 6 ÷ 3 = 2 · 90 ÷ 9 = 10 · 40 ÷ 5 = 8
About this mystery
- Grade level
- Grade 2 math
- Math topics
- Multiplication, Word problems, Place value, Addition, Division
- Reading level
- grades 1-2
- Theme
- The Mars Crystal Mystery — set in Astro-Dome Nine on Mars
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects