🔎 JapanGrade 6Reading: grades 1-2Place valuePercentagesExponentsOrder of operationsDivision
The Great Robo-Museum Mystery
Oh no! A sneaky Neon Shadow stole the golden scroll from the Tokyo Robo-Museum. The Tokyo Robo Squad needs your help. Use your math skills to track down the thief!
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 | Ninja Gear | Mega Mech Power | Writing Hand | Hair Streak Color | Fear |
|---|---|---|---|---|---|
| Kaito | shadow cloak | jet pack | left handed | pink streak | flashing camera lights |
| Mio | shadow cloak | robo arm | left handed | blue streak | meowing robot cats |
| Kenji | smoke bomb | neon shield | left handed | green streak | loud taiko drums |
| Yuto | paper glider | jet pack | left handed | pink streak | loud taiko drums |
| Rin | glowing fan | robo arm | left handed | pink streak | flashing camera lights |
| Mei | bamboo staff | robo arm | right handed | blue streak | flashing camera lights |
| Haruto | bamboo staff | robo arm | left handed | pink streak | loud taiko drums |
| Naoko | paper glider | laser sword | right handed | blue streak | meowing robot cats |
| Hiro | paper glider | neon shield | left handed | blue streak | meowing robot cats |
| Hana | smoke bomb | speed boots | left handed | pink streak | loud taiko drums |
| Koki | shadow cloak | neon shield | right handed | pink streak | loud taiko drums |
| Shinji | glowing fan | speed boots | right handed | green streak | meowing robot cats |
| Riku | glowing fan | neon shield | left handed | pink streak | loud taiko drums |
| Yua | shadow cloak | laser sword | right handed | pink streak | loud taiko drums |
| Sota | smoke bomb | jet pack | left handed | green streak | meowing robot cats |
| Takuya | paper glider | robo arm | right handed | pink streak | loud taiko drums |
| Aoi | paper glider | robo arm | left handed | pink streak | loud taiko drums |
| Ren | bamboo staff | robo arm | right handed | blue streak | loud taiko drums |
| Yuma | smoke bomb | neon shield | left handed | pink streak | meowing robot cats |
| Sora | paper glider | robo arm | left handed | blue streak | loud taiko drums |
| Keiko | shadow cloak | robo arm | left handed | green streak | meowing robot cats |
Clue 1
Place value
The thief left a digital code on the door. Look at the digit in the thousands place. It will show us 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
30
50
900
100
500
300
300
5000
500
10
200
600
900
40
10
600
T
30
9000
40
900
5000
7000
900
T
30
1000
5000
400
70
What is the value of the 3 in 82,634?T
What is the value of the 6 in 823,681?O
What is the value of the 1 in 67,617?N
What is the value of the 7 in 238,474?K
What is the value of the 5 in 742,509?I
What is the value of the 1 in 966,179?V
What is the value of the 5 in 79,153?H
What is the value of the 7 in 87,611?J
What is the value of the 1 in 21,870?P
What is the value of the 4 in 13,495?C
What is the value of the 5 in 385,718?A
What is the value of the 9 in 15,972?E
What is the value of the 9 in 49,214?U
What is the value of the 4 in 93,148?S
What is the value of the 3 in 97,309?L
What is the value of the 2 in 799,258?D
0/16 letters found
Clue 2
Percentages
A robot helper scanned the room. It found energy marks. What percent of the room is clean? Solve this 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
25
14
15
44
15
31
T
25
14
7
22
35
35
43
39
32
32
15
35
5
32
33
44
44
15
35
33
22
28
5% of 500 =T
10% of 150 =E
50% of 62 =F
25% of 172 =R
5% of 100 =S
5% of 780 =O
10% of 320 =P
10% of 220 =N
25% of 140 =D
10% of 70 =A
50% of 56 =K
20% of 70 =H
60% of 55 =I
50% of 88 =L
0/14 letters found
Clue 3
Exponents
The security lock has a power scale. It grows fast by multiplying itself. Solve the power problem to unlock the third 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
196
49
324
T
196
49
289
324
4
169
144
400
4
169
225
121
T
196
49
324
16
225
100
361
T
196
144
289
216
225
361
169
100
121
14^2 =T
20^2 =N
7^2 =H
13^2 =R
2^2 =F
11^2 =M
6^3 =K
18^2 =E
15^2 =O
2^4 =L
17^2 =I
10^2 =U
12^2 =A
19^2 =D
0/14 letters found
Clue 4
Order of operations
We found a secret plan. We must follow the rules of math steps to read it. Solve the steps in the right order for clue four!
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
18
57
59
26
17
15
48
46
45
11
15
76
28
46
11
73
63
66
73
57
46
76
11
15
66
28
57
55
26
6
76
6 + 4 × 3 =W
2 + 2 × 2 =C
12 × 7 - 11 =R
11 × 7 - 22 =L
6 × 10 - 14 =A
7 + 4 × 2 =N
9 × 10 - 27 =S
36 + 3 × 4 =D
9 × 10 - 14 =K
8 × 8 - 19 =P
9 × 9 - 15 =T
49 + 5 × 2 =F
8 × 10 - 23 =E
6 × 4 - 13 =I
8 × 6 - 22 =O
24 + 2 × 2 =H
3 × 8 - 7 =U
0/17 letters found
Clue 5
Division facts (1-12) — the last clue
The ninja divided their stolen star toys into equal groups. How many toys are in each group? This last answer gives us the final 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
110 ÷ 10 = ?
60 ÷ 12 = ?
9 ÷ 9 = ?
14 ÷ 7 = ?
48 ÷ 8 = ?
16 ÷ 2 = ?
50 ÷ 5 = ?
18 ÷ 2 = ?
12 ÷ 1 = ?
63 ÷ 9 = ?
3 ÷ 1 = ?
Step 2 — cross out the sentence with each answer
1.The villain throws a smoke bomb to vanish, then runs out the back door in speed boots.
2.The villain throws a smoke bomb to vanish, then grabs the golden scroll with a robo arm.
3.The villain throws a paper glider into the air, then runs out the back door in speed boots.
4.The villain waves a glowing fan to make wind, then blocks the security laser with a neon shield.
5.The villain throws a paper glider into the air, then grabs the golden scroll with a robo arm.
6.The villain wraps a shadow cloak around them, then runs out the back door in speed boots.
7.The villain waves a glowing fan to make wind, then grabs the golden scroll with a robo arm.
8.The villain wraps a shadow cloak around them, then grabs the golden scroll with a robo arm.
9.The villain wraps a shadow cloak around them, then flies up into the sky using a jet pack.
10.The villain spins a bamboo staff fast, then runs out the back door in speed boots.
11.The villain spins a bamboo staff fast, then grabs the golden scroll with a robo arm.
12.The villain waves a glowing fan to make wind, then runs out the back door in speed boots.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Great Robo-Museum Mystery
Culprit: Riku (glowing fan · neon shield · left handed · pink streak · loud taiko drums)
- Clue 1 (Place value): "THE VILLAIN DOES NOT USE A JET PACK"What is the value of the 3 in 82,634? = 30 (T) · What is the value of the 6 in 823,681? = 600 (O) · What is the value of the 1 in 67,617? = 10 (N) · What is the value of the 7 in 238,474? = 70 (K) · What is the value of the 5 in 742,509? = 500 (I) · What is the value of the 1 in 966,179? = 100 (V) · What is the value of the 5 in 79,153? = 50 (H) · What is the value of the 7 in 87,611? = 7000 (J) · What is the value of the 1 in 21,870? = 1000 (P) · What is the value of the 4 in 13,495? = 400 (C) · What is the value of the 5 in 385,718? = 5000 (A) · What is the value of the 9 in 15,972? = 900 (E) · What is the value of the 9 in 49,214? = 9000 (U) · What is the value of the 4 in 93,148? = 40 (S) · What is the value of the 3 in 97,309? = 300 (L) · What is the value of the 2 in 799,258? = 200 (D)
- Clue 2 (Percentages): "THE LEFT HAND DROPPED SPILLED INK"5% of 500 = 25 (T) · 10% of 150 = 15 (E) · 50% of 62 = 31 (F) · 25% of 172 = 43 (R) · 5% of 100 = 5 (S) · 5% of 780 = 39 (O) · 10% of 320 = 32 (P) · 10% of 220 = 22 (N) · 25% of 140 = 35 (D) · 10% of 70 = 7 (A) · 50% of 56 = 28 (K) · 20% of 70 = 14 (H) · 60% of 55 = 33 (I) · 50% of 88 = 44 (L)
- Clue 3 (Exponents): "THE THIEF RAN FROM THE LOUD TAIKO DRUM"14^2 = 196 (T) · 20^2 = 400 (N) · 7^2 = 49 (H) · 13^2 = 169 (R) · 2^2 = 4 (F) · 11^2 = 121 (M) · 6^3 = 216 (K) · 18^2 = 324 (E) · 15^2 = 225 (O) · 2^4 = 16 (L) · 17^2 = 289 (I) · 10^2 = 100 (U) · 12^2 = 144 (A) · 19^2 = 361 (D)
- Clue 4 (Order of operations): "WE FOUND A PINK HAIR STREAK IN THE LOCK"6 + 4 × 3 = 18 (W) · 2 + 2 × 2 = 6 (C) · 12 × 7 - 11 = 73 (R) · 11 × 7 - 22 = 55 (L) · 6 × 10 - 14 = 46 (A) · 7 + 4 × 2 = 15 (N) · 9 × 10 - 27 = 63 (S) · 36 + 3 × 4 = 48 (D) · 9 × 10 - 14 = 76 (K) · 8 × 8 - 19 = 45 (P) · 9 × 9 - 15 = 66 (T) · 49 + 5 × 2 = 59 (F) · 8 × 10 - 23 = 57 (E) · 6 × 4 - 13 = 11 (I) · 8 × 6 - 22 = 26 (O) · 24 + 2 × 2 = 28 (H) · 3 × 8 - 7 = 17 (U)
- Clue 5 (Division facts (1-12)): surviving statement (box 4) → Riku110 ÷ 10 = 11 · 60 ÷ 12 = 5 · 9 ÷ 9 = 1 · 14 ÷ 7 = 2 · 48 ÷ 8 = 6 · 16 ÷ 2 = 8 · 50 ÷ 5 = 10 · 18 ÷ 2 = 9 · 12 ÷ 1 = 12 · 63 ÷ 9 = 7 · 3 ÷ 1 = 3
About this mystery
- Grade level
- Grade 6 math
- Math topics
- Place value, Percentages, Exponents, Order of operations, Division
- Reading level
- grades 1-2
- Theme
- The Great Robo-Museum Mystery — set in the Tokyo Robo-Museum
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects