🚀 SpaceGrade 3Reading: grades 3-4RoundingMultiplicationWord problemsPlace valueDivision
The Moonbase Sabotage
A sneaky space pirate has sneaked into Lunar Outpost Alpha and tampered with the core systems! Commander Nova needs your detective skills to decode the clues and identify the intruder.
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 | Gear Tool | Equipment | Dominant Hand | Hairstyle | Weakness |
|---|---|---|---|---|---|
| Kalpana Chawla | Gravity Boots | Star Map | Left Handed | Buzz Cut | Cold Vacuum |
| Ellen Ochoa | Force Shield | Star Map | Left Handed | Buzz Cut | Cold Vacuum |
| Yuri Gagarin | Plasma Torch | Solar Panel | Left Handed | Helmet Hair | Bright Light |
| Chris Hadfield | Laser Cutter | Probe Drone | Right Handed | Ponytail | Magnet Blast |
| Victor Glover | Gravity Boots | Solar Panel | Right Handed | Buzz Cut | Bright Light |
| Stephanie Wilson | Jetpack | Radio Beacon | Right Handed | Ponytail | Magnet Blast |
| Sunita Williams | Plasma Torch | Star Map | Right Handed | Helmet Hair | Cold Vacuum |
| Scott Kelly | Plasma Torch | Probe Drone | Left Handed | Ponytail | Magnet Blast |
| Leland Melvin | Plasma Torch | Oxygen Tank | Left Handed | Buzz Cut | Bright Light |
| Bernard Harris | Gravity Boots | Solar Panel | Right Handed | Buzz Cut | Magnet Blast |
| Neil Armstrong | Force Shield | Solar Panel | Right Handed | Buzz Cut | Bright Light |
| Valentina Tereshkova | Jetpack | Probe Drone | Right Handed | Ponytail | Bright Light |
| Alan Shepard | Force Shield | Radio Beacon | Left Handed | Ponytail | Magnet Blast |
| John Glenn | Jetpack | Oxygen Tank | Right Handed | Ponytail | Magnet Blast |
| Eileen Collins | Force Shield | Star Map | Right Handed | Ponytail | Magnet Blast |
| Sally Ride | Force Shield | Probe Drone | Right Handed | Ponytail | Magnet Blast |
| Guy Bluford | Gravity Boots | Probe Drone | Right Handed | Ponytail | Cold Vacuum |
| Michael Collins | Plasma Torch | Radio Beacon | Right Handed | Buzz Cut | Cold Vacuum |
| Christina Koch | Gravity Boots | Star Map | Right Handed | Ponytail | Cold Vacuum |
| Jeanette Epps | Plasma Torch | Oxygen Tank | Right Handed | Ponytail | Bright Light |
| Samantha Cristoforetti | Jetpack | Star Map | Left Handed | Helmet Hair | Cold Vacuum |
Clue 1
Rounding
The radar scanner rounded the distance readout to the nearest ten to pinpoint the target.
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
40
200
6000
80
6000
7000
200
20
T
30
60
4000
200
6000
2000
4000
T
30
40
5000
900
200
5000
90
5000
60
300
4000
8000
200
5000
20
4000
2000
Round 27 to the nearest tenT
Round 4,741 to the nearest thousandA
Round 8,390 to the nearest thousandB
Round 39 to the nearest tenH
Round 83 to the nearest tenU
Round 7,167 to the nearest thousandP
Round 20 to the nearest tenC
Round 867 to the nearest hundredV
Round 6,395 to the nearest thousandS
Round 1,588 to the nearest thousandN
Round 4,095 to the nearest thousandO
Round 61 to the nearest tenD
Round 318 to the nearest hundredI
Round 86 to the nearest tenR
Round 181 to the nearest hundredE
0/15 letters found
Clue 2
Multiplication facts (1-12)
We inspected the storage bay where supply modules were lined up in equal rows across the room.
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
3
45
121
66
42
42
T
3
11
15
80
21
T
3
25
25
45
42
99
7
15
80
8
45
T
3
45
7
21
64
121
64
25
T
3
121
11
3 × 1 =T
9 × 11 =W
8 × 8 =D
5 × 3 =R
1 × 11 =P
2 × 4 =G
1 × 7 =A
5 × 5 =S
5 × 9 =H
11 × 6 =F
3 × 7 =N
11 × 11 =E
6 × 7 =O
8 × 10 =I
0/14 letters found
Clue 3
Word problems
The flight engineer needed help calculating the total gear inventory for the launch.
Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.
Someonescaredthevillainoffwith .
M
66
61
76
33
14
60
12
L
61
S
60
Astronaut lined up 11 rows of 6 laser grid. How many laser grid in all?M
Astronaut lined up 6 rows of 10 moon rock. How many moon rock in all?T
Astronaut found 30 oxygen tank yesterday and 3 more today. How many oxygen tank in all?N
Astronaut lined up 4 rows of 3 laser grid. How many laser grid in all?B
Astronaut found 30 laser grid yesterday and 31 more today. How many laser grid in all?A
Astronaut found 66 laser grid yesterday and 10 more today. How many laser grid in all?G
Astronaut lined up 7 rows of 2 oxygen tank. How many oxygen tank in all?E
0/7 letters found
Clue 4
Place value
The airlock keypad flashed a number in the hundreds place to give us a 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.
A
8000
60
40
20
A
8000
500
30
4000
A
8000
60
40
900
70
30
900
500
A
8000
2000
3000
4000
700
3000
500
1000
40
A
8000
900
2000
What is the value of the 8 in 8,646?A
What is the value of the 6 in 360?S
What is the value of the 7 in 732?P
What is the value of the 7 in 9,178?E
What is the value of the 4 in 948?T
What is the value of the 2 in 7,321?R
What is the value of the 4 in 4,215?W
What is the value of the 1 in 61,963?Y
What is the value of the 9 in 947?I
What is the value of the 5 in 4,564?N
What is the value of the 3 in 438?D
What is the value of the 2 in 2,651?L
What is the value of the 3 in 53,694?O
0/13 letters found
Clue 5
Division facts (1-12) — the last clue
We split the remaining fuel canisters equally among the crew to keep the station running.
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
6 ÷ 1 = ?
9 ÷ 3 = ?
32 ÷ 8 = ?
8 ÷ 8 = ?
110 ÷ 11 = ?
14 ÷ 2 = ?
54 ÷ 6 = ?
18 ÷ 9 = ?
55 ÷ 5 = ?
15 ÷ 3 = ?
64 ÷ 8 = ?
Step 2 — cross out the sentence with each answer
1.The villain cut the emergency power, then scrambled the ship radio.
2.The villain cut the emergency power, then stole the stellar map.
3.The villain shut down the magnetic shield, then jammed the solar array.
4.The villain cut the emergency power, then drained the backup fuel.
5.The villain shut down the magnetic shield, then scrambled the ship radio.
6.The villain sliced the fuel pipes, then swiped the moon crystals.
7.The villain shut down the magnetic shield, then stole the stellar map.
8.The villain zapped the main console, then stole the stellar map.
9.The villain zapped the main console, then jammed the solar array.
10.The villain sliced the fuel pipes, then stole the stellar map.
11.The villain blasted the airlock door, then jammed the solar array.
12.The villain shut down the magnetic shield, then swiped the moon crystals.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Moonbase Sabotage
Culprit: Sally Ride (Force Shield · Probe Drone · Right Handed · Ponytail · Magnet Blast)
- Clue 1 (Rounding): "THE SUSPECT DOES NOT HAVE A RADIO BEACON"Round 27 to the nearest ten = 30 (T) · Round 4,741 to the nearest thousand = 5000 (A) · Round 8,390 to the nearest thousand = 8000 (B) · Round 39 to the nearest ten = 40 (H) · Round 83 to the nearest ten = 80 (U) · Round 7,167 to the nearest thousand = 7000 (P) · Round 20 to the nearest ten = 20 (C) · Round 867 to the nearest hundred = 900 (V) · Round 6,395 to the nearest thousand = 6000 (S) · Round 1,588 to the nearest thousand = 2000 (N) · Round 4,095 to the nearest thousand = 4000 (O) · Round 61 to the nearest ten = 60 (D) · Round 318 to the nearest hundred = 300 (I) · Round 86 to the nearest ten = 90 (R) · Round 181 to the nearest hundred = 200 (E)
- Clue 2 (Multiplication facts (1-12)): "THE FOOTPRINTS SHOW A RIGHT HANDED STEP"3 × 1 = 3 (T) · 9 × 11 = 99 (W) · 8 × 8 = 64 (D) · 5 × 3 = 15 (R) · 1 × 11 = 11 (P) · 2 × 4 = 8 (G) · 1 × 7 = 7 (A) · 5 × 5 = 25 (S) · 5 × 9 = 45 (H) · 11 × 6 = 66 (F) · 3 × 7 = 21 (N) · 11 × 11 = 121 (E) · 6 × 7 = 42 (O) · 8 × 10 = 80 (I)
- Clue 3 (Word problems): "MAGNET BLAST"Astronaut lined up 11 rows of 6 laser grid. How many laser grid in all? = 66 (M) · Astronaut lined up 6 rows of 10 moon rock. How many moon rock in all? = 60 (T) · Astronaut found 30 oxygen tank yesterday and 3 more today. How many oxygen tank in all? = 33 (N) · Astronaut lined up 4 rows of 3 laser grid. How many laser grid in all? = 12 (B) · Astronaut found 30 laser grid yesterday and 31 more today. How many laser grid in all? = 61 (A) · Astronaut found 66 laser grid yesterday and 10 more today. How many laser grid in all? = 76 (G) · Astronaut lined up 7 rows of 2 oxygen tank. How many oxygen tank in all? = 14 (E)
- Clue 4 (Place value): "A STRAND WAS TIED IN A LOW PONYTAIL"What is the value of the 8 in 8,646? = 8000 (A) · What is the value of the 6 in 360? = 60 (S) · What is the value of the 7 in 732? = 700 (P) · What is the value of the 7 in 9,178? = 70 (E) · What is the value of the 4 in 948? = 40 (T) · What is the value of the 2 in 7,321? = 20 (R) · What is the value of the 4 in 4,215? = 4000 (W) · What is the value of the 1 in 61,963? = 1000 (Y) · What is the value of the 9 in 947? = 900 (I) · What is the value of the 5 in 4,564? = 500 (N) · What is the value of the 3 in 438? = 30 (D) · What is the value of the 2 in 2,651? = 2000 (L) · What is the value of the 3 in 53,694? = 3000 (O)
- Clue 5 (Division facts (1-12)): surviving statement (box 12) → Sally Ride6 ÷ 1 = 6 · 9 ÷ 3 = 3 · 32 ÷ 8 = 4 · 8 ÷ 8 = 1 · 110 ÷ 11 = 10 · 14 ÷ 2 = 7 · 54 ÷ 6 = 9 · 18 ÷ 9 = 2 · 55 ÷ 5 = 11 · 15 ÷ 3 = 5 · 64 ÷ 8 = 8
About this mystery
- Grade level
- Grade 3 math
- Math topics
- Rounding, Multiplication, Word problems, Place value, Division
- Reading level
- grades 3-4
- Theme
- The Moonbase Sabotage — set in Lunar Outpost Alpha
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects